Brother Dh4 B980 Users Manual S91980 302

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Dh4-B980 Instructions DH4-B980 INSTRUCTIONS DH4-B980 INSTRUCTIONS BROTHER a.teamworksales.com

Rh-9800 Instructions RH-9800 INSTRUCTIONS RH-9800 INSTRUCTIONS BROTHER a.teamworksales.com

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DH4-B980

RH-9800

Please read this manual before using the machine.

Please keep this manual within easy reach for quick reference.

ELECTRONIC EYELET BUTTON HOLER

INSTRUCTION MANUAL

RH-9800

i

Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety

instructions below and the explanations given in the instruction manual.

With industrial sewing machines, it is normal to carry out work while positioned directly in front of moving parts such as

the needle and thread take-up lever, and consequently there is always a danger of injury that can be caused by these

parts. Follow the instructions from training personnel and instructors regarding safe and correct operation before

operating the machine so that you will know how to use it correctly.

SAFETY INSTRUCTIONS

1. Safety indications and their meanings

This instruction manual and the indications and symbols that are used on the machine itself are provided in order to

ensure safe operation of this machine and to prevent accidents and injury to yourself or other people.

The meanings of these indications and symbols are given below.

Indications

DANGER The instructions which follow this term indicate situations where failure to follow the

instructions will almost certainly result in death or severe injury.

CAUTION The instructions which follow this term indicate situations where failure to follow the

instructions could cause injury when using the machine or physical damage to

equipment and surroundings.

Symbols

........................................This symbol ( ) indicates something that you should be careful of. The

picture inside the triangle indicates the nature of the caution that must be

taken.

(For example, the symbol at left means “beware of injury”.)

........................................This symbol ( ) indicates something that you must not do.

........................................This symbol ( ) indicates something that you must do. The picture

inside the circle indicates the nature of the thing that must be done.

(For example, the symbol at left means “you must make the ground

connection”.)

RH-9800 ii

2. Notes on safety

DANGER

Wait at least 5 minutes after turnin

g

off the

p

ower switch and disconnectin

g

the

p

ower cord from the wall outlet

before o

p

enin

g

the face

p

late of the control box. Touchin

g

areas where hi

g

h volta

g

es are

p

resent can result in

severe injury.

CAUTION

Environmental requirements

Use the sewing machine in an area which is free

from sources of stron

g

electrical noise such as

high-frequency welders.

Sources of stron

g

electrical noise ma

y

cause

problems with correct operation.

Any fluctuations in the power supply voltage

should be within 10% of the rated voltage for

the machine.

Voltage fluctuations which are greater than this

may cause problems with correct operation.

The

p

ower su

pp

l

y

ca

p

acit

y

should be

g

reater than

the re

q

uirements for the sewin

g

machine’s

electrical consumption.

Insufficient

p

ower su

pp

l

y

ca

p

acit

y

ma

y

cause

problems with correct operation.

The

p

neumatic deliver

y

ca

p

abilit

y

should be

g

reater than the re

q

uirements for the sewin

g

machine's total air consumption.

Insufficient

p

neumatic deliver

y

ca

p

abilit

y

ma

y

cause problems with correct operation.

The ambient tem

p

erature should be within the

range of 5 to 35 during use.

Tem

p

eratures which are lower or hi

g

her than this

may cause problems with correct operation.

The relative humidit

y

should be within the ran

g

e of

45% to 85% durin

g

use, and no dew formation

should occur in any devices.

Excessivel

y

dr

y

or humid environments and dew

formation ma

y

cause

p

roblems with correct

operation.

Avoid exposure to direct sunlight during use.

Ex

p

osure to direct sunli

g

ht ma

y

cause

p

roblems

with correct operation.

In the event of an electrical storm, turn off the

p

ower and disconnect the

p

ower cord from the

wall outlet.

Li

g

htnin

g

ma

y

cause

p

roblems with correct

operation.

Installation

Machine installation should onl

y

be carried out b

y

a qualified technician.

Contact your Brother dealer or a qualified electrician

for any electrical work that may need to be done.

The sewin

g

machine wei

g

hs more than 87 k

g

.

The installation should be carried out b

y

two or

more people.

Do not connect the

p

ower cord until installation is

com

p

lete, otherwise the machine ma

y

o

p

erate if

the start switch is

p

ressed b

y

mistake, which could

result in injury.

Be sure to connect the

g

round. If the

g

round

connection is not secure, you run a high risk of

receiving a serious electric shock, and problems

with correct operation may also occur.

A

ll cords should be secured at least 25 mm awa

y

from an

y

movin

g

p

arts. Furthermore, do not

excessivel

y

bend the cords or secure them too

firml

y

with sta

p

les, otherwise there is the dan

g

er

that fire or electric shocks could occur.

Install the belt covers to the machine head and

motor.

If usin

g

a work table which has casters, the casters

should be secured in such a wa

y

so that the

y

cannot move.

Be sure to wear

p

rotective

g

o

gg

les and

g

loves

when handlin

g

the lubricatin

g

oil and

g

rease, so

that the

y

do not

g

et into

y

our e

y

es or onto

y

our

skin, otherwise inflammation can result.

Furthermore, do not drink the oil or eat the

g

rease

under an

y

circumstances, as the

y

can cause

vomiting and diarrhoea.

Keep the oil out of the reach of children.

RH-9800

iii

CAUTION

Sewing

This sewing machine should only be used by

operators who have received the necessary

training in safe use beforehand.

The sewin

g

machine should not be used for an

y

applications other than sewing.

Be sure to wear

p

rotective

g

o

gg

les when usin

g

the

machine.

If

g

o

gg

les are not worn, there is the dan

g

er that if a

needle breaks,

p

arts of the broken needle ma

y

enter your eyes and injury may result.

Turn off the power switch at the following times,

otherwise the machine ma

y

o

p

erate if the start

switch is

p

ressed b

y

mistake, which could result in

injury.

When threading the needle

When replacing the needle

When not usin

g

the machine and when leavin

g

the machine unattended

If usin

g

a work table which has casters, the casters

should be secured in such a wa

y

so that the

y

cannot move.

A

ttach all safet

y

devices before usin

g

the sewin

g

machine. If the machine is used without these

devices attached, injury may result.

Do not touch an

y

of the movin

g

p

arts or

p

ress an

y

ob

j

ects a

g

ainst the machine while sewin

g

, as this

ma

y

result in

p

ersonal in

j

ur

y

or dama

g

e to the

machine.

If an error occurs in machine o

p

eration, or if abnormal

noises or smells are noticed, immediatel

y

turn off the

p

ower switch. Then contact

y

our nearest Brother

dealer or a qualified technician.

If the machine develo

p

s a

p

roblem, contact

y

our

nearest Brother dealer or a qualified technician.

Cleaning

Turn off the

p

ower switch before carr

y

in

g

out

cleaning, otherwise the machine may operate if

the start switch is

p

ressed b

y

mistake, which could

result in injury.

Be sure to wear

p

rotective

g

o

gg

les and

g

loves

when handlin

g

the lubricatin

g

oil and

g

rease, so

that the

y

do not

g

et into

y

our e

y

es or onto

y

our

skin, otherwise inflammation can result.

Furthermore, do not drink the oil or eat the

g

rease

under an

y

circumstances, as the

y

can cause

vomiting and diarrhoea.

Keep the oil out of the reach of children.

Maintenance and inspection

Maintenance and inspection of the sewing

machine should only be carried out by a qualified

technician.

Ask your Brother dealer or a qualified electrician to

carry out any maintenance and inspection of the

electrical system.

Turn off the power switch and disconnect the

power cord from the wall outlet at the following

times, otherwise the machine may operate if the

start switch is pressed by mistake, which could

result in injury.

When carrying out inspection, adjustment and

maintenance

When replacing consumable parts such as the

loopers and knife

Disconnect the air hoses from the air supply and

wait for the needle on the pressure gauge to drop

to “0” before carrying out inspection, adjustment

and repair of any parts which use the pneumatic

equipment.

If the power switch and air need to be left on when

carrying out some adjustment, be extremely

careful to observe all safety precautions.

Use only the proper replacement parts as

specified by Brother.

If any safety devices have been removed, be

absolutely sure to re-install them to their original

positions and check that they operate correctly

before using the machine.

Any problems in machine operation which result

from unauthorized modifications to the machine

will not be covered by the warranty.

RH-9800 iv

3. Warning labels

The following warning labels appear on the sewing machine.

Please follow the instructions on the labels at all times when using the machine. If the labels have been removed

or are difficult to read, please contact your nearest Brother dealer.

Safety devices

Eye guard

Finger guard

Needle bar guard

Belt cover, etc.

3Do not touch the knife or press any objects

against the machine while sewing, as this

may result in personal injury or damage to

the machine.

4

Be sure to connect the ground. If the ground connection is not secure, you run a high risk o

f

receiving a serious electric shock, and problems with correct operation may also occur.

5Direction of operation

Belt cover

Needle bar guard

Eye guard 5

2

Finger

guard

1

2010Q

12

4 (Rear)

Belt cover

Winding prevention bar

3

3

CONTENTS

1. NAMES OF EACH PART ............................1

2. SPECIFICATIONS ..........................................2

2-1. Specifications .......................................................2

3. INSTALLATION.................................................3

3-1. Table processing diagram .................................3

3-2. Installing the motor .............................................4

3-3. Installing the machine head ...............................4

3-4. Installing the oil container ...................................5

3-5. Installing the spool stand ....................................6

3-6. Tightening the V-belt ..........................................6

3-7. Installing the control box ....................................7

3-8.

Installing the air unit and the valve assembly

.......7

3-9.

Connecting the ground wires and the wirings

.......8

3-10. Connecting the air tubes ....................................9

3-11. Installing the air hoses ......................................10

3-12. Connecting the power cord ..............................11

4. LUBRICATION..................................................12

4-1. Adding oil ..........................................................12

4-2. Lubrication ........................................................12

5. CORRECT USE ..............................................14

5-1. Initializing settings .............................................14

5-2.

Changing the lower thread and gimp trimming

........14

5-3.

Checking the direction of machine operation

.......15

5-4. Installing the needle ..........................................16

5-5. Threading the upper thread ..............................16

5-6. Threading the lower thread...............................17

5-7. Threading the gimp ..........................................18

5-8. Setting the material ...........................................18

6. USING THE OPERATION PANEL

AND FRONT PANEL ...................................19

6-1. Panel button and switch names ......................19

6-2. Selecting a program number ...........................20

6-3. Changing the mode ..........................................20

6-4. Changing the cutting timing .............................20

6-5. Setting a program .............................................21

A. Setting the sewing speed ...............................22

B. Setting the shape of the eyelet.......................22

C. Setting the buttonhole length .........................22

D. Setting the tacking length ...............................23

E. Setting the offset .............................................23

F. Setting the stitch pitch.....................................23

G. Setting the number of eyelet stitches.............24

H. Setting the cutting space ................................24

I. Setting the knife position compensation ........24

P1. Setting X correction .......................................25

P2. Setting Y correction .......................................25

P3. Setting θ1 correction.......................................25

P4. Setting θ2 correction.......................................26

6-6. Using the memory switch .................................27

6-7. List of error codes .............................................29

7. SEWING .............................................................. 30

7-1. Using the EMERGENCY STOP switch .......... 30

7-2. Sewing .............................................................. 31

7-3. Adjusting the thread tension ............................ 32

7-4. Needle and knife position ................................ 33

7-5. Using the production counter .......................... 35

7-6. Using a cycle program ..................................... 36

7-7.

Setting the feed bracket to the front position

...... 37

7-8.

Switching between single-pedal and dual-pedal

operation (Switching the foot controller)

............. 37

7-9. Using feed mode ............................................. 38

7-10. Using manual mode ........................................ 39

7-11. Changing the cycle program counter ............. 40

7-12.

Setting the number of home position cycles

...... 40

7-13. Returning to the home position ....................... 41

8.

CLEANING AND MAINTENANCE

......42

8-1. Cleaning ........................................................... 42

8-2. Draining the oil ................................................. 42

8-3. Checking the air filter ....................................... 42

9. STANDARD ADJUSTMENTS ............... 43

9-1.

Adjusting the height of the spreader and looper

....... 43

9-2. Adjusting the needle and looper timing ........... 44

9-3. Adjusting the loop stroke .................................. 45

9-4. Adjusting the height of the needle bar ............. 46

9-5. Adjusting the clearance between the

looper and needle............................................. 46

9-6. Adjusting the needle guard .............................. 47

9-7.

Adjusting the spreader mounting positions

......... 47

9-8. Adjusting the spreader timing .......................... 48

9-9. Adjusting the needle racking width

(stitch width) ...................................................... 48

9-10. Changing the knife cutting length

(Replacing the cutting block)............................ 49

9-11. Adjusting the contact between the knife

and the cutting block ........................................ 50

9-12. Replacing the knife .......................................... 51

9-13. Adjusting the cutting pressure ......................... 51

9-14. Adjusting the cloth opening amount ............... 52

9-15.

Adjusting the trimming of the upper thread

...... 53

9-16. Adjusting the trimming of the lower thread

and gimp .......................................................... 53

9-17.

Adjusting the gimp length after trimming (-02)

... 54

9-18. Lower thread presser (-02) .............................. 55

9-19. Sub presser (-02) ............................................. 55

10.

SUMMARY OF DIP SWITCHES

......... 56

10-1. Front panel DIP switches .............................. 56

10-2. Circuit board DIP switches ............................ 57

11. TROUBLESHOOTING ............................ 58

1. NAMES OF EACH PART

RH-9800 1

1. NAMES OF EACH PART

(1) Front cover (2) EMERGENCY STOP switch (3) Upper shaft pulley (4) Control panel

(5) Control box (6) Front panel (7) Start switch (8) Cloth presser switch

(9) Foot controller (10) Power switch (11) Motor

(8)

(10)

(9)

(1)

(2)

(4)

(7)

(3)

(5)

1096

Q

(11)

(6)

2. SPECIFICATIONS

RH-9800

2

2. SPECIFICATIONS

2-1. Specifications

Lower thread trimmer

Upper thread

trimmer Long type Short type

-00 - -

-01 -

-02 - *

Specification -00 -01 -02

Application Men's clothes and ladies' clothes Jeans and work clothes

Sewing speed 1,000 - 2,000 rpm (100 rpm steps)

Button hole length 10 – 50 mm 10 – 38 mm

L1 14 – 18 mm L5 28 – 32 mm

L2 18 – 22 mm L6 32 – 36 mm

L3 22 – 26 mm L7 36 – 40 mm

L4 26 – 30 mm

Stitch pitch 0.5 - 2.0 mm (0.1 mm steps)

Stitch width 1.5 - 3.2 mm

Tacking length 3 – 43 mm (1 mm steps) or none

Cloth presser height 12 mm 16 mm

Stitch shape

changing Selected by a program

Cut timing selection Selected by a switch

Starting method Dual switch (cloth presser switch and start switch) or single switch

Feed method Intermittent feed by three pulse motors (X, Y, θ)

Needle DO x 558 Nm 80 – Nm 120 (Schmetz)

Safety equipment Built-in emergency stop function and automatic stopping device which stops the machine when

the safety circuit is activated

Air pressure Main regulator: 0.5 MPa

Knife pressure regulator: 0.3 MPa

Air consumption 43.2 l/min. (8 cycles/min.)

Noise level 81 dB at max. speed of 2,000 rpm, measured according to ISO 10821

Dimensions 1,200 mm (W) x 590 mm (D) x 1,120 mm (H)

Work table legs T-shaped height-adjustable type

Power supply Single-phase 110, 200, 220, 230, 240 V

3-phase 220, 380, 415 V

Maximum electric power consumption: 1 kVA

Weight 175 kg

Eyelet buttonhole Straight buttonhole

Sewing shape

Eyelet buttonhole Eyelet buttonhole with

taper Straight buttonhole Straight buttonhole

with taper

* -02 is further divided into L1 - L7 specifications in accordance with the stitch

length. Please be sure to specify the stitch length when ordering.

DH4-B980-

RH-9800-

0793Q 0794Q 0795Q 0796Q

3.INSTALLATION

RH-9800 3

3. INSTALLATION

CAUTION

Machine installation should only be carried out by

a qualified technician.

Contact your Brother dealer or a qualified electrician

for any electrical work that may need to be done.

The sewing machine weighs more than 87 kg. The

installation should be carried out by two or more

people.

Do not connect the power cord until installation is

complete, otherwise the machine may operate if

the start switch is pressed by mistake, which could

result in injury.

All cords should be secured at least 25 mm away

from any moving parts. Furthermore, do not

excessively bend the cords or secure them too

firmly staples, otherwise there is the danger that

fire or electric shocks could occur.

Be sure to connect the ground. If the ground

connection is not secure, you run a high risk of

receiving a serious electric shock, and problems

with correct operation may also occur.

Install the belt covers to the machine head and

motor.

3-1. Table processing diagram

Use the special table indicated below.

Thread trimmer Product code

Upper thread trimmer 127-980-000-01

Upper and lower thread trimmer 127-980-001-01

If using a commercially-available table, process it as shown in the illustration below.

Note: The thickness of the table should be at least 50 mm, and it should b e strong enough to bear the weight and

vibration of the sewing machine.

2011Q

3. INSTALLATION

RH-9800

4

3-2. Installing the motor

1. Insert the three bolts (1) into the work table.

2. Turn the work table upside down to make it easier to

install the motor (2).

3. Align the motor (2) with the bolts (1), and then install

the motor (2) to the underside of the work table with

the three washers (3) and the three nuts (4).

Note: Do not use the cushion rubber. If you use it, V

belt tension cannot be adjusted.

3-3. Installing the machine head

1. Insert the accessory bed stand cushions A (1) into the bed stand, and then place the machine head on top of the work

table.

Note: When placing the machine head on top of the work table, have two or more people there to hold the handles A

and B and the rear of the head C.

2. Open the front cover (2), and then use the bed stand mounting bolt (3), washer (4), cushioning rubber (5), bed stand

cushion A (1), large washer (6) and nut (7) to attach the front right corner of the bed stand to the work table.

3. Open the rear cover (8), and then attach the bed stand to the work table in two places inside the stand in the same

way as in step 2. above.

4. Remove the fixing bolt (9) and the washer.

Note: The fixing bolt (9) and washer should be kept, as they will be needed again if the machine head is moved.

5. Raise the machine head, and then attach the front left corner of the bed stand to the work table in the same way as in

the steps above.

Note: Make sure that steps 2. to 4. above have been completed before raising the machine head.

(2)

(4)

(3)

(1)

1098Q

(3)

(4)

(5)

(2)

(9)

(1)

(7)

(1)

(3)

(4)

(5)

0808Q

(6)

(8)

(6)

(7)

1099Q

3.INSTALLATION

RH-9800 5

Raising the machine head

1. While holding the handles of the machine head (1) with both hands, gently raise the machine head.

Note: Be sure to turn the power supply off before raising the machine head.

2. If you wish to keep the machine head in the raised position, insert the head support lever (2) securely into the hinge

lever support shaft (3).

Note: Always check that the head support lever (2) and the hinge lever support shaft (3) are meshed.

Lowering the machine head

Pull the machine head down toward you gently, remove the head support lever (2) from the hinge lever support shaft

(3), and then gently lower the machine head.

Note: Do not hold the machine head by the feed bracket (4) or X feed shaft A (5) when it is being raised and

lowered.

3-4. Installing the oil container

1. Install the oil draining cap support (2) to the base of

the bed stand (1) with the two screws (3).

2. Screw the oil container (4) into the oil draining cap

support (2).

3. Push the oil draining spring pin (5) into the bed stand

(1) until the pin is flush with the surface of the stand.

4. Lower the machine head. (Refer to "Lowering the

machine head" above.)

When machine head is raised 0810Q0809Q

When machine

head is lowered

(

2

)

(

3

)

(1)

(5)

0811Q

0812Q

(5)

(1)

(5)

(1)

(2)

(3)

(3)

(4)

(4)

(1)

(2)

(3)

3. INSTALLATION

RH-9800

6

3-5. Installing the spool stand

1. To assemble the spool stand (1), follow the instructions in

the manual that came with the spool stand (1).

2. Secure the spool stand (1) to the rear right corner of

the work table with the washer and nut (2).

3-6. Tightening the V-belt

1. Open the rear cover.

2. Pass the V-belt (1) through the base of the bed stand and through the hole in the work table.

3. Loosen the two screws (2) and then remove the motor pulley cover (3).

4. Place the V-belt (1) onto the motor pulley (4).

5. Check that there is approximately 10 mm of deflection in the V-belt (1) when it is pushed in the middle with a load of 0.1 N.

If the tightness needs adjusting, loosen the two nuts (5) and move the motor up or down.

6. Install the belt casting prevention bracket (8) to the pulley cover (3) with the wing bolt (6) and washer (7).

Align the center of the washer (7) with the gradation (7) 0 shown on the outside of the pulley at this time.

7. Provisionally tighten the winding prevention bar (9) to the pulley cover (3) with the wing bolt (10).

8. Install the pulley cover (3) and tighten it with the two screws (2).

Note: Check that the V-belt is not touching the belt casting prevention bracket (8).

9. Align the winding prevention bar (9) with the point in between the V-belt and the motor pulley, and then secure it by

tightening the wing bolt (10).

Note: Check that the winding prevention bar (9) does not touching the V-belt or the motor pulley.

After a long period of use, the V-belt will become run in and will loosen around the motor pulley. When this

happens, turn off the power and adjust by the procedure given in step 5. above.

0815Q

(1)

(2)

1100Q 1101Q

1198Q

(4)

(1)

(5)

(9)

(1)

(7)

(2)

(8) (3) (7)

(6)

(9)

(1) (10)

Motor pulley

Approx.

10 mm

0.1N

3.INSTALLATION

RH-9800 7

3-7. Installing the control box

1. Align the four bolt holes in the control box (1) with the

four holes in the work table.

2. Install the control box (1) with the four bolts (2), spring

washers (3) and flat washers (4)

3. Push the four caps (5) in over the top of the bolts (2).

3-8. Installing the air unit and the valve assembly

Refer to the work table processing diagram on page 3 for the installation position.

1. Install the air unit (1) to the underside of the work table with the two screws (2).

2. Install the valve assembly (3) with the two screws (4).

3. Connect air hose No. 15 to the intermediate joint (5) of the air unit (1) and to the joint (6) of the valve assembly (3), and

connect air hose No. 16 to joints (7) and (8).

Connecting the knife valve cables

Connect the two black knife valve cables to terminal No.4 and No.6 of the 12-pin connector of the air harness.

1103Q

12-pin connector

No.6 (black)

No.4 (black) Black cable

12-pin connector

Black cable

(1)

(5)

(2)

(7)

(4)

(8)

(3)

(6)

No. 15

No. 16

1102Q

(5)

(2)

(3)

(4)

(1)

3. INSTALLATION

RH-9800

8

3-9. Connecting the ground wires and the wirings

1. Connect the foot controller cable (1) and the motor cable (2) to the control box.

2. Install the power switch (3) to the underside of the work table with the two screws (4).

3. Clamp the foot controller cable (1) with the two cable clips (5) and then secure the cable clips (5) with the screws (6).

4. Install the motor cable (2) and the power switch cable to the underside of the work table with the staple (7).

5. Pass the cable and air tube which are coming out of the feed bracket (8) and the left side of the bed stand (9) through

the cable hole (10) in the work table.

6. Pass the cable and air tube which are coming out of the belt cover (11) and the machine head (12) through the cable

hole (13) in the work table.

7. Insert each of the connectors into the connectors on the control box. (Refer to the illustration above.)

8. Pass the cables and air hoses through the two cable holders (14), and then secure the cable holders (14) to the

underside of the work table with the two screws (15).

9. The ground wires (16), (17) should always be connected to the control box.

10.Connect the accessory ground wire (18) to the ground terminal of the control box and to the table leg installation bolt.

Note: If the ground wire is not connected, mis-operation due to discharges of static electricity may occur.

11. Connect the power switch connector (19) to the motor.

1106Q

(2)

(1)

(7)

(3)

(4)

Needle

position sensor

1110Q 1111Q1108Q

1107Q 1109Q

(9)

(8)

(12)

(11)

(16)

(13) (10)

(17)

(19)

(10)

(14)

(15)

(15)

(16)

(17)

(18) 4P

12P

6P

6P

6P

White

Blue

Black

White

White

White

(5)

(6)

Power switch installation position

1104Q 1105Q

3.INSTALLATION

RH-9800 9

Insert the harness (L1 - L7) (1) to connector No. 10 (9-pin).

* When connecting the harness (1), check that its label number is the same as the numbers on the right movable

knife (2), left movable knife (3), thread handler (4), right cloth presser (5), left cloth presser (6) and movable knife

driving cam (7). (If a connector with a different label number is inserted, the machine could be damaged or thread

trimming errors could result.)

* There is 10 mm of difference in the knife installation positions between L1 - L4 and L5 - L7.

3-10. Connecting the air tubes

Connect the air tubes to the joints of the solenoid valve assembly, using the illustration below as a reference.

Numbers are marked on each of the air hoses which come out of the sewing machine.

Specification Label No. of

harness

Right/left cloth presser No.

Right/left movable knife No.

Thread handler No.

L1 11

L2 22

L3 33

L4 44

L5 5 5

L6 6 6

L7 7 7

< -02 >

No.10

Label No.

(1)

1112Q 1113Q

No.

No.

(5)

(2)

(3)

(7)

(4)

(6)

Label No. Solenoid valve

5Upper thread trimming

4Upper thread tightening

3

Lower thread tr

i

mm

i

ng *1

2Cloth spreading

(Sub presser *2)

1Cloth presser

*1 If the lower thread trimmer is not

installed, solenoid valve [3] is not

used.

*2 The sub presser can only be used

for machines with -02 specification.

< -00,-01 >

< -02 >

0826Q

0827Q

Plug 4

0828Q 0829Q

3. INSTALLATION

RH-9800

10

3-11. Installing the air hoses

Connect the air hose from the compressor to the air unit underneath the work table.

1. Turn the nut (1) at the end of the air hose, and then

connect the hose to the valve (2).

2. Open the air cock (3) on the compressor.

Check that there is no air leaking from the valve

connection.

3. Open the cock (3) by turning it in the direction of the

arrow.

The meter needle will move clockwise.

4. Adjust the air pressure by following the procedure on

the next page.

Adjusting the air pressure

Set the air pressure for the knife pressure adjustment regulator (3) to the lowest pressure at which the knife can still cut

the material. Set the standard air pressure for the main regulator (1) to 0.5 MPa.

To increase the air pressure 1. Gently lift the knob (2) of the main regulator (1) and

turn it in the direction of the arrow in the illustration.

The pressure will increase when the knob (2) is turned

clockwise.

2. Gently lift the knob (4) of the knife pressure adjustment

regulator (3) and turn it in the direction of the arrow in

the illustration.

The pressure will increase when the knob (4) is turned

clockwise.

* The pressure for the knife pressure adjustment

regulator (3) is adjusted to 0.3 MPa. Be careful not

to increase this pressure needlessly, otherwise

poor cutting performance or damage to the knife

may result.

To decrease the air pressure 1. Close the cock (5). (The needle will remain at the high

pressure position.)

2. Turn the knob screw (6) in the direction of the arrow in

the illustration to loosen it. Make sure that you turn it in

the correct direction.

The air will escape from the reservoir and the needle

will drop.

3. Tighten the knob screw (6).

4. To reduce the air pressure, gently lift knob (2) or knob

(4) and turn it counterclockwise.

5. Open the cock (5). Air will enter the reservoir and the

needle will move

0834Q 0835Q

Closed

Open

(1)

(3)

(3)

(2)

(0.3 MPa)

(0.5 MPa)

(3)

(1)

(2) (4)

0836Q

0837Q

(0.5 MPa) (0.3 MPa)

(3)

(1)

(4)

(2)

(5)

(6)

To tighten

To loosen

To close

3.INSTALLATION

RH-9800 11

3-12. Connecting the power cord

CAUTION

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious

electric shock, and problems with correct operation may also occur.

Do not connect the power cord until installation is complete, otherwise the machine may operate if the start

switch is pressed by mistake, which could result in injury.

1. Attach an appropriate plug to the power cord (1). (The

green and yellow wire is the ground wire.)

2. Insert the plug into properly-grounded AC power

supply.

Note: Do not use extension cords, otherwise

machine operation problems may result.

0840Q

0839Q

(1)

Single phase

Three phase

Green and yellow wire

(ground wire)

(1)

Green and yellow wire

(ground wire)

1114Q

4. LUBRICATION

RH-9800

12

4. LUBRICATION

CAUTION

Turn off the power switch before starting lubricating, otherwise the machine may operate if the start switch is

pressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not

get into your eyes or onto your skin, otherwise inflammation can result.

Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and

diarrhoea.

Keep the oil out of the reach of children.

Use only specified Brother oil (Nisseki Mitsubishi Sewing Lube 10 N; VG10) for the machine oil.

4-1. Adding oil

Check the oil level by looking at the sight glass. If the oil level is low, replenish the oil supply.

Filling the arm oil tank Filling the bed base oil tank

4-2. Lubrication

Oil these parts once a day.

Oil the moving parts of the needle bar, looper and spreader mechanisms and also the cam groove, roller, the felt at the

base of the wick and the wick before using the sewing machine for the first time, and also after long periods of non-use.

When oiling, some oil will get onto the thread. Carry out a test sewing to ensure that your material does not get stained

with oil.

Oiling the needle bar and cam

Add 2-3 drops of oil in the places indicated by the arrows.

(1)

(2)

0859Q 0860Q

1. Pour approximately 10 cc of machine oil into the arm oil

tank (1) (until it is about four-fifths full).

1. Raise the machine head.

2. Pour approximately 20 cc of machine oil into the bed

base oil tank (2) (until it is about four-fifths full).

3. Lower the machine head.

0861Q

4.LUBRICATION

RH-9800 13

Oiling the looper, spreader and race stand

<Removing the cloth presser plates>

1. Turn the upper shaft pulley (1) toward you until the mark on the pulley (A) is aligned with the notch in the pulley cover (2).

2. Move the feed bracket (3) toward you.

3. Turn the left and right plate pressers (4) in the directions indicated by the arrows.

4. Lift up the clamp lever (6) and the notched section (7) of the right cloth presser plate (5), remove the right cloth presser

plate (5) from the pin (8), and then pull the right cloth presser plate (5) toward you to remove it.

Note: If the lower thread trimmer has been installed, move cloth presser plate U (9) to a position where it can be

removed without its touching the needle.

Raise cloth presser plate U (9), pass the needle through the hole, and then remove cloth presser plate U (9)

from the pin (8).

5. Remove the left cloth presser plate (10) in the same way as the right cloth presser plate (5) was removed.

6. Open the front cover.

7. Turn the race stand and add a few drops of oil to the spreader cam (11), and to the supports for the looper link (12)

and spreader link (13).

8. Add a few drops of oil to the shafts of the right spreader (14), left spreader (15) and LS-holder bracket (16).

9. Fill the felt tank (17) on the race stand with oil also.

10.Add 5 - 6 drops of oil to the felt (18) which is attached to the sliding surfaces of the race stand and the bed.

11. Close the front cover.

12.Install the cloth presser plates by carrying out the steps 5., 4. and 3. in that order.

(3)

(6)

(2)

(1)

(A)

(4)

(10)

(8)

(6)

(4)

(5)

(9)

(7)

1116Q

0862Q 1117Q

(13)

(18)

(12)

(14)

(15)

(11)

(16)

(17)

0868Q

0866Q1118Q 1119Q

5. CORRECT USE

RH-9800

14

5. CORRECT USE

5-1. Initializing settings

The following procedure should be carried out before the sewing machine is used for the first time, and also after long

periods of non-use.

If "E-59" appears on the front panel display when the power is turned on, be sure to follow this procedure to initialize all

settings. ("E-59" will appear after a PROM has been replaced or after long periods of non-use. For details on the "E-59"

message display, refer to page 27.)

1. Turn off the power.

2. Remove the five screws (1).

3. Open the rear plate (2) of the control box.

4. Set DIP switch No. 1 (3) on the circuit board to ON.

5. Turn the power back on again.

Note: A buzzer will sound while the data is being

initialized.

6. Turn off the power.

7. Set DIP switch No. 1 (3) on the circuit board to OFF.

8. Close the rear plate (2) and tighten the five screws (1).

5-2. Changing the lower thread and gimp trimming

The sewing machine is set to lower thread and gimp trimming when it is shipped from the factory. (DIP switch No. 6 (3)

is set to ON.)

Carry out the following procedure only if you wish to activate upper thread trimming.

1. Turn off the power.

2. Remove the five screws (1).

3. Open the rear plate (2) of the control box.

4. Set DIP switch No. 6 (3) on the circuit board to OFF.

Note: Do not activate lower thread trimming if using

a 39-mm cutter.

Do not set DIP switch No. 6 (3) on the circuit

board to ON.

5. Close the rear plate (2) and tighten the five screws (1).

(2)

(1)

(3) (2)

1120Q

(2)

(3)

(1)

1121Q

5. CORRECT USE

RH-9800 15

5-3. Checking the direction of machine operation

1. Turn the upper shaft pulley (1) toward you until the mark (A) on the pulley (1) is aligned with the notch in the cover (2).

2. Press the power switch (3) to turn on the power.

The power indicator will illuminate and the TROUBLE indicator will flash.

3. Press the RESET button (4).

The TROUBLE indicator will switch off and the feed bracket (5) will move to the cloth setting position.

4. Press the MODE button (6) to switch to automatic mode.

The AUTO mode indicator will illuminate.

5. Depress the cloth presser switch (7).

The cloth presser (8) will be lowered.

6. Depress the start switch (9).

The machine will sew one buttonhole and will then stop.

* If the buzzer makes a beeping sound and "E-89" appears on the front panel display, the direction of operation of the

upper shaft is reversed.

Press the power switch (3) to turn the power off, and then switch over the top and bottom motor connectors (10).

7. The direction of machine operation will now be correct.

(2)

(1)

(5)

(3)

(7)

(9)

(4)

(10)

(6)

(A)

(8)

0862Q 1124Q

1123Q1116Q

1122Q

5. CORRECT USE

RH-9800

16

5-4. Installing the needle

CAUTION

Turn off the power switch before installing the needle, otherwise the machine may operate if the start switch is

pressed by mistake, which could result in injury.

Use only Schmetz D0 x 558 Nm80 – Nm120 needles.

1. Raise the finger guard (1).

2. Loosen the screw (2), and then remove the needle (3).

3. Insert the new needle (3) as far as it will go so that the

groove is facing toward you.

4. Securely tighten the screw (2).

5. Remove the cloth presser plates. (Refer to page 13.)

Note: After removing the cloth presser plates, check

that the index mark (4)on the machine head is

aligned with the index mark (5) on the race

stand before inserting the needle (3) (when

the race stand is turned fully to the right).

6. Lower the finger guard (1).

5-5. Threading the upper thread

CAUTION

Turn off the power switch before threading the thread, otherwise the machine may operate if the start switch is

pressed by mistake, which could result in injury.

Thread the upper thread as shown in the illustration below.

* Use the accessory needle threader (1).

(1)

(2)

(3)

(5)

(4)

0872Q

0873Q

0871Q

(1)

0875Q

0878Q0877Q1125Q

5. CORRECT USE

RH-9800 17

5-6. Threading the lower thread

Remove the cloth presser plates (refer to page 13), and then thread the lower thread as shown in the illustration below.

For upper thread trimming specifications (-00)

For upper and lower thread trimming specifications (-01, -02)

0879Q 0881Q

0880Q

0883Q

0882Q 0881Q

5. CORRECT USE

RH-9800

18

5-7. Threading the gimp

Remove the cloth presser plates (refer to page 13), and then thread the gimp as shown in the illustration below.

Once threading is complete, replace the cloth presser plates.

5-8. Setting the material

1. Insert the material so that it touches the right and left cloth guides (1).

2. The sewing margin can be adjusted to within 10 - 30 mm.

3. Loosen the screws (2) at left and right and move the cloth guides (1) back and forth to adjust the sewing margin.

<-00, -01>

<-02>

0884Q

0885Q

0886Q

Pass the gimp through the hole o

f

the thread tension stud (1).

Refer to “9-17. Adjusting the gimp length after trimming (-02)” (Page 54).

10 - 30 mm

(1)

(2) (2)

(1)

(2)

(1)

(2)

0889Q 0890Q

(1)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800 19

6.

USING THE OPERATION PANEL AND FRONT PANEL

6-1. Panel button and switch names

Operation panel part names

Front panel part name

POWER indicator

(A) SPEED indicator

1127Q

TROUBLE indicator

RESET button

Program number display window

CYCLE PROGRAM indicator

PROGRAM NUMBER button

AUTO mode Indicator

FEED mode indicator

MANUAL mode

indicator

PROGRAM mode indicator

MODE button

KNIFE button

A

FTER indicato

r

OFF indicator

BEFORE indicator

(B) EYELET PATTERN indicator

(C) LENGTH indicator

(D) TACKING LENGTH indicator

(E) OFFSET indicator

(F) STITCH PITCH indicator

(M) SELECT button

(K) “Down” button

(I) KNIFE

POSITION indicator

(J) Front panel display

(L) “UP” button

(N) ENTER button

(H) CUTTING

SPACE

indicator

(G)No. OF

STITCHES

indicator

1126Q

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800

20

If the power is turned on and the RESET switch is then pressed, the feed bracket will move to the cloth setting position.

Operations such as selecting a program number, changing the operation mode and selecting the cutting method can

then be carried out.

6-2. Selecting a program number

A maximum of nine different eyelet shapes can be programmed.

1. Press the PROGRAM NUMBER button (1). (Check

which of the mode indicator illuminates.)

In automatic, feed or manual mode, the program

numbers are displayed in the program number

display window (2) in the following order each time

the button is pressed.

→ 1→ 2 9

Note: If cycle programs have been input, the

sequence will be as follows:

→ 1 → 2 9→ → → →

( indicates a cycle program.)

* In programming mode, the program numbers are

displayed in the program number display window

(2) in the following order each time the button is

pressed.

→ 1 → 2 9 → C

6-3. Changing the mode

1. Press the MODE button (1).

* The mode changes in the following order each time

the button is pressed.

→ AUTO → FEED → MANUAL → PROGRAM

Automatic mode is used for normal sewing.

Feed mode is used to move the feed bracket with

out sewing in order to check component positions.

Use the Manual mode to check the machine

operation when sewing by turning the upper shaft

pulley by hand.

Programming mode is used when setting

programs.

6-4. Changing the cutting timing

When "BEFORE" (cutting before sewing) is selected, the

knife operates before the buttonhole is sewn.

When "OFF" (no cutting) is selected, the knife does not

operate.

When "AFTER" (cutting after sewing) is selected, the

knife operates after the buttonhole is sewn.

1. Press the KNIFE button (1).

* The cutting timing changes in the following order

each time the button is pressed.

→BEFORE → OFF → AFTER

1128Q

(2)

(1)

1019Q

(1)

1129Q

(1)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800 21

6-5. Setting a program

1. Push the section on the front panel marked "PUSH"

to open the front panel.

2. Press the MODE button (1) to switch to

programming mode.

Programming will not be possible unless the

PROGRAM indicator is illuminated.

* The SPEED indicator (A) will illuminate and the

current sewing speed appear on the front panel

display (J).

3. Press the PROGRAM NUMBER button (2) until the

desired program number appears in the program

number display window (3).

4. Press the SELECT button (M) to select a letter from

"A" to "P4."

* The character displayed changes in the following

order each time the button is pressed.

→A→ B P4

Then make the required settings by following steps 5.

and 6. below.

5. Press the "Up" button (L) or the "Down" button (K) to

change the setting value.

* When the setting value is changed, the numerals

appearing in the display will flash.

6. Press the ENTER button (N) to accept the changed

value.

* The display will stop flashing.

Note: If you press the SELECT button (M) or the

MODE button (1) while the display is still

flashing, the setting value will not be changed.

(J)

1130Q 1131Q

(3)

(2) (1)

(L)

(N)

(K)

(M)

(J)

(L)

(N)

(M)

(K)

(A)

1133Q

1132Q

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800

22

A.Setting the sewing speed 1. The sewing speed can be set to between 1000 - 2000

rpm in 11 100-rpm steps.

2. Press the "Up" button (L) or the "Down" button (K) to

set the desired sewing speed.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new sewing

speed setting.

* The display will stop flashing.

B.Setting the shape of the eyelet 1. The eyelet can be set to one of five different shapes in

accordance with the different shapes of knife.

The No. 2 knife is installed as the default knife for

standard specifications.

2. Select the same eyelet number as the number of the

knife which is being used.

3. Press the "Up" button (L) or the "Down" button (K) to

set the desired eyelet shape.

* When the setting value is being changed, the

numerals appearing in the display will flash.

4. Press the ENTER button (N) to accept the new eyelet

shape setting.

* The display will stop flashing.

C.Setting the buttonhole length <-00, -01>

1. The buttonhole can be set to a length of between 10

and 38 mm (10 to 50 mm with no looper thread

trimmer) in steps of 1 mm.

Note: You cannot set the buttonhole length to a

value that would make the difference between

the buttonhole length and the tacking length

less than 7 mm.

2. Press the "Up" button (L) or the "Down" button (K) to

set the desired buttonhole length.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new

buttonhole length setting.

* The display will stop flashing.

<-02>

The setting range is limited by the machine specifications (L1 - L7).

Example: For L1 specifications

1. The buttonhole can be set to a length of between 14 - 18 mm in steps of 1 mm.

Note: You cannot set the buttonhole length to a value that would make the difference between the buttonhole length

and the tacking length less than 7 mm.

2. Press the "Up" button (L) or the "Down" button (K) to set the desired buttonhole length.

* When the setting value is being changed, the numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new buttonhole length setting.

* The display will stop flashing.

The buttonhole lengths for L2 - L7 specifications can also be set in steps of 1 mm.

1135Q

1134Q (N)(L)(K)

1137Q

1136Q (N)(L)(K)

1139Q

1138Q (N)

(L)

(K)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800 23

D.Setting the tacking length 1. The tacking length can be set to between 3 and 43

mm in steps of 1 mm.

2. If not adding tacking, set the tacking length to "0". If

this is done, it will not be possible to set a value for the

offset.

Note: You cannot set the tacking length to a value

that would make the difference between the

buttonhole length and the tacking length less

than 7 mm.

3. Press the "Up" button (L) or the "Down" button (K) to

set the desired tacking length.

* When the setting value is being changed, the

numerals appearing in the display will flash.

4. Press the ENTER button (N) to accept the new tacking

length setting.

* The display will stop flashing.

E.Setting the offset 1. The offset can be set to between 0.5 and 2 mm in

steps of 0.1 mm.

* The offset should normally be set to half the stitch

width.

If a tacking length that is outside the 0 - 3 mm range

is set, it will be set back to 1.5 mm automatically.

2. Press the "Up" button (L) or the "Down" button (K) to

set the desired offset.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new offset

setting.

* The display will stop flashing.

Example: If the stitch width is 3 mm, set the offset to

3 mm ÷ 2 = 1.5 mm.

However, fine adjustments to this value

may be necessary depending on the

material and/or the thread tension.

F. Setting the stitch pitch 1. The stitch length can be set to between 0.5 and 2 mm

in steps of 0.1 mm.

2. Press the "Up" button (L) or the "Down" button (K) to

set the desired stitch length.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new stitch

length setting.

* The display will stop flashing.

1140Q 1141Q

C

D

1143Q

1142Q

EStitch

width

1145Q

1144Q

(L)

(N)

(K)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800

24

G. Setting the number of eyelet stitches 1. The number of eyelet stitches can be set to between 4

and 20 stitches in steps of 1 stitch.

2. Press the “Up” button (L) or the "Down" button (K) to

set the desired number of eyelet stitches.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new eyelet

stitch number setting.

* The display will stop flashing.

H. Setting the cutting space 1. The cutting space can be set to between -0.3 and 0.5

mm in steps of 0.1 mm.

Note: You cannot set the cutting space to a value

that would make the difference between the

knife position compensation and the cutting

space less than -0.7 mm.

2. Press the “Up” button (L) or the " Down" button (K) to

set the desired cutting space.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new cutting

space setting.

* The display will stop flashing.

I. Setting the knife position compensation 1. The knife position compensation can be set to

between -0.7 and +0.7 mm in steps of 0.1 mm.

* If you would like to move the knife closer to the

seam, set to a negative value; if you would like to

move it away from the seam, set to a positive value.

Note: You cannot set the knife position

compensation to a value that would make the

difference between the knife position

compensation and the cutting space less than

-0.7 mm.

2. Press the "Up" button (L) or the "Down" button (K) to

set the desired knife position compensation.

* When the setting value is being changed, the

numerals appearing in the display will flash.

3. Press the ENTER button (N) to accept the new knife

position compensation setting.

* The display will stop flashing.

1147Q

1146Q

(L)

(N)

(K)

1148Q 1149Q

(L)

(N)

(K)

1150Q 1151Q

(L)

(N)

(K)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800 25

P1. Setting X correction 1. The setting range is from 1 to 6 in steps of 1.

* Set to a larger value if you would like to move the

eyelet seam to the right (when seen from the

finished side, or the reverse side when sewing).

2. Press the “up” button (L) or the “down” button (K) to

set the X correction value.

* When the setting value is changed, the value

displayed will start to flash.

3. Press the ENTER button (N) to accept the X

correction setting.

* The display will stop flashing and will start

illuminating steadily.

P2. Setting Y correction 1. The setting range is from 1 to 6 in steps of 1.

* Set to a larger value if you would like to move the

right-side seam further forward (when seen from

the finished side, or the reverse side when sewing).

2. Press the “up” button (L) or the “down” button (K) to

set the Y correction value.

* When the setting value is changed, the value

displayed will start to flash.

3. Press the ENTER button (N) to accept the Y

correction setting.

* The display will stop flashing and will start

illuminating steadily.

P3. Setting θ1 correction 1. The setting range is from -3 to 3 in steps of 1.

* Set to a larger value if you would like to rotate the

seam which is not part of the eyelet clockwise

(when seen from the finished side, or the reverse

side when sewing).

2. Press the “up” button (L) or the “down” button (K) to

set the θ1 correction value.

* When the setting value is changed, the value

displayed will start to flash.

3. Press the ENTER button (N) to accept the θ1

correction setting.

* The display will stop flashing and will start

illuminating steadily.

1152Q 1153Q

(L)

(N)

(K)

1154Q 1155Q

(L)

(N)

(K)

1156Q 1157Q

(L)

(N)

(K)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800

26

P4. Setting θ 2 correction 1. The setting range is from -3 to 3 in steps of 1.

* Set to a larger value if you would like to rotate the

eyelet seam clockwise (when seen from the

finished side, or the reverse side when sewing).

2. Press the “up” button (L) or the “down” button (K) to

set θ 2 correction value.

* When the setting value is changed, the value

displayed will start to flash.

3. Press the ENTER button (N) to accept the θ2

correction setting.

* The display will stop flashing and will start

illuminating steadily.

1158Q 1159Q

(L)

(N)

(K)

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800 27

6-6. Using the memory switch

The conditions of the memory switches are memorized even if the power is OFF, however, if data of the memory

switches are initialized, the memory switches will be returned to their initial settings (factory default settings).

1. While pressing the SELECT button (M), press the power switch to turn on the power.

* The two left-side columns of the front panel display (J) are the memory switch number, and the two right-side

columns show the memory switch setting (or value).

2. Press the SELECT button (M) to select the desired memory switch number.

* The setting range is from 00 to 99. However, numbers in unused ranges are skipped.

3. Press the “UP” button (L) or “DOWN” button (K) to select the desired memory switch number.

* For memory switches which can be set to ON or OFF, press the "UP" button (L) to set to "On", and press the

"DOWN" button (K) to set to "OF". "On" represents ON, and "OF" represents OFF.

4. Press the ENTER button (N) to store the memory switch setting.

5. Press the MODE button (1).

* The TROUBLE indicator will flash and the sewing machine will go to normal standby mode.

No. Contents Setting range Initial

value

00 Bar tacking at the sewing start to prevent fraying OFF: Disabled

ON: Enabled OFF

01 Number of stitches for memory switch No. 00

* Does not appear when memory switch No. 00

is set to OFF.

01: 1 stitch

02: 2 stitches

03: 3 stitches

01

02 Bar tacking at the sewing end to prevent fraying OFF: Disabled

ON: Enabled OFF

03 Number of stitches for memory switch No. 02

* Does not appear when memory switch No. 02

is set to OFF.

01: 1 stitch

02: 2 stitches

03: 3 stitches

01

04

Work clamp operation selection when feed

bracket is at front position

(Set to OFF if the cutting block may strike the

Work clamp.)

OFF: The work clamp passes underneath the cutting

block, then rises and moves forward.

ON: The work clamp rises and then moves

forward.

OFF

05 Eyelet buttonhole sewing speed setting OFF: Same speed as speed A set at the front panel.

ON: Different speed from speed A set at the front

panel.

OFF

06

Speed for memory switch No. 05

(If the speed is set to a higher value than

speed A that has been set at the front panel,

the speed will not exceed speed A.)

* Does not appear when memory switch No. 05

is set to OFF.

10: 1,000rpm, 11: 1,100rpm, 12: 1,200rpm,

13: 1,300rpm, 14: 1,400rpm, 15: 1,500rpm,

16: 1,600rpm, 17: 1,700rpm, 18: 1,800rpm,

19: 1,900rpm, 20: 2,000rpm

18

(J)

(L)

(N)

(K)

(M) (1)

1019Q

1160Q

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800

28

No. Contents Setting range Initial

value

07 Y direction offset for return seam to prevent

thread breakage OFF: No offset

ON: Offset by 1/2 pitch OFF

08 Sewing end pitch for buttonhole taper to

prevent fraying OFF: No change

ON: Change OFF

09

No. of stitches before pitch change for memory

switch No. 08

* Does not appear when memory switch No. 08

is set to OFF.

01: 1 stitch, 02: 2 stitches, 03: 3 stitches,

04: 4 stitches, 05: 5 stitches 01

10

No. of stitches after pitch change for memory

switch No. 08

* Does not appear when memory switch No. 08

is set to OFF.

01: 1 stitch, 02: 2 stitches, 03: 3 stitches,

04: 4 stitches, 05: 5 stitches, 06: 6 stitches,

07: 7 stitches, 08: 8 stitches, 09: 9 stitches 01

11 Test feeding speed OFF: Standard speed

ON: Low speed OFF

12 Speed for memory switch No. 11

* Does not appear when memory switch No. 11

is set to OFF.

20: 20% of standard speed

35: 35% of standard speed

50: 50% of standard speed 50

13 Knife operation (BEFORE/OFF/AFTER) setting OFF: Setting not possible within cycle program

ON: Setting possible within cycle program OFF

14 Special lapel cutting device OFF: Disabled

ON: Enabled OFF

15 Button hole sensor (Special lapel cutting

device)

OFF: Disabled

ON: Enabled OFF

16 Timer for checking lowering of cutting block

(Timer for determining if cutting block is

lowered)

OFF:Disabled (Determined from slit signal

stopping)

ON: Enabled (Determined by timer) OFF

17 Time for memory switch No. 16

* Does not appear when memory switch No. 16

is set to OFF.

42: 420 ms, 45: 450ms, 48: 480ms,

51: 510ms, 54: 540 ms 45

18 Changing cutting block ON time

* Disabled (always "OFF") when memory

switch No. 16 is "ON"

OFF: Disabled (25 ms)

ON: Enabled OFF

19 Time for memory switch No. 18

* Does not appear when memory switch No. 18

is set to OFF.

05: 50 ms, 10: 100ms,

15: 150ms, 20: 200 ms 05

20

Timer for checking raising of cutting block

(Timer for determining if the cutting block has

been raised to a position where it will not touch

the next feed bracket to operate)

OFF: Disabled (Determined from number of slit

signals)

ON: Enabled (Determined by timer) OFF

21 Time for memory switch No. 20

* Does not appear when memory switch No. 20

is set to OFF.

15: 150ms, 20: 200 ms, 25: 250ms,

30: 300ms, 35: 350ms, 40: 400ms,

45: 450ms, 50: 500ms 20

22

Cutting block raising check timer

(Raised position of the cutting block is

determined from the number of slit signals, and

timer is updated)

* Disabled (always "OFF") when memory

switch No. 20 is "ON"

OFF: Disabled

ON: Enabled OFF

23 Time for memory switch No. 22

* Does not appear when memory switch No. 22

is set to OFF.

05: 50 ms, 10: 100ms, 15: 150ms,

20: 200 ms, 25: 250ms, 30: 300ms,

35: 350ms, 40: 400ms 05

24 Setting tacking length to 0 for straight tacking

specifications OFF: Disabled

ON: Enabled OFF

25

99 Spare - -

6. USING THE OPERATION PANEL AND FRONT PANEL

RH-9800 29

6-7. List of error codes

If the buzzer sounds and an error code starting with "E" appears in the front panel display, check according to

the table below.

Codes E-00 to E-16 are errors which are displayed when the power is turned on. Codes E-30 to E-59 are resetting errors

which are displayed before operation and after the EMERGENCY STOP switch is pressed. Codes E-60 to E-89

represent errors which occur during operation.

Code Explanation Resetting method

E-00 EMERGENCY STOP switch was pressed.

Press the EMERGENCY STOP switch once

more and then press the RESET button.

E-02 Machine head is raised (safety switch is off). Turn off the power.

E-03 Cloth presser switch was pressed. Release the cloth presser switch and then

press the RESET button.

E-04 Start switch was pressed. Release the start switch and then press

the RESET button.

E-05 RESET button was pressed. Turn off the power.

E-09 Sewing specifications changeover harness and stitch length

changeover harness and PROM version do not match. Turn off the power.

E-10 Needle bar is not at the highest position. Raise the needle to the needle up position

and then press the RESET button.

E-12 Cutting block is lowered. Turn off the power.

E-15 Lower thread and gimp trimming knife does not retract. Turn off the power.

E-16 Upper thread trimming knife does not retract. Turn off the power.

E-30 EMERGENCY STOP switch was pressed.

Press the EMERGENCY STOP switch once

more and then press the RESET button.

E-32 Machine head is raised (safety switch is off). Turn off the power.

E-35 RESET button was pressed. Turn off the power and then press the

RESET button.

E-40 Needle bar has not been raised. Raise the needle to the needle up position

and then press the RESET button.

E-42 Cutting block is lowered. Turn off the power.

E-45 Lower thread and gimp trimming knife does not retract. Turn off the power.

E-46 Upper thread trimming knife does not retract. Turn off the power.

E-50 X axis is not at the home position. Turn off the power.

E-51 Y axis is not at the home position. Turn off the power.

E-52 θ axis is not at the home position Turn off the power.

E-59 Sewing data has been corrupted (checked for each program). Turn off the power.

E-60 EMERGENCY STOP switch was pressed. Press the RESET button (to interrupt) or

the start switch (to continue).

E-62 Machine head is raised (safety switch is off). Turn off the power.

E-69 Needle bar does not stop at the highest position.

Raise the needle to the needle up position

and then press the start switch (to continue).

E-70 Needle up signal does not turn on and off during operation. Turn off the power.

E-71 Needle down signal does not turn on and off during operation. Turn off the power.

E-72 Cutting block operation is incorrect. Turn off the power.

E-75 Lower thread and trimming operations are incorrect. Turn off the power.

E-76 Upper thread operation is incorrect. Turn off the power.

E-80 When the feed bracket returns to the home position, the X axis is

not at the home position. Turn off the power.

E-81 When the feed bracket returns to the home position, the Y axis is

not at the home position. Turn off the power.

E-82 When the feed bracket returns to the home position, the θ axis is

not at the home position. Turn off the power.

E-89 Machine operation direction is reversed. Turn off the power.

E-91 Pulse motor overcurrent Turn off the power.

Note: Errors E-50, E-51 and E-52 are not errors to be reset after the EMERGENCY STOP switch is pressed.

7. SEWING

RH-9800

30

7. SEWING

Make sure you know where the EMENRGENCY STOP switch is and how it is used before operating the sewing

machine.

7-1. Using the EMERGENCY STOP switch

In automatic mode

1. Press the EMERGENCY STOP switch (1).

* All machine operations will stop and the buzzer will sound. The TROUBLE indicator will illuminate and "E-60" will

appear on the front panel display at this time.

2. Eliminate the cause of the problem.

* The machine will not always stop in the needle up position if the EMERGENCY STOP switch (1) is pressed during

sewing.

Turn the upper shaft pulley by hand to raise the needle to the needle up position (so that the marks are aligned).

* The feed bracket (2) can be moved back and forth at this time by pressing the "up" button (L) and "Down" button

(K).

3. To continue sewing, press the start switch (3).

* The TROUBLE indicator will switch off, the "E-60" will be cleared from the front panel display and sewing will begin

again.

To stop sewing, press the RESET button (4).

* The TROUBLE indicator will switch off, the "E-60" will be cleared from the front panel display and the feed bracket

will return to the cloth setting position.

In manual mode or in automatic mode

1. Press the EMERGENCY STOP switch (1).

* All machine operations will stop and the buzzer will sound. The TROUBLE indicator will illuminate and "E-60" will

appear on the front panel display at this time.

2. Eliminate the cause of the problem.

3. Press the RESET button (4).

* The TROUBLE indicator will switch off, the "E-60" error code will be cleared from the front panel display and the

feed bracket will return to the cloth setting position.

1161Q 1163Q

1162Q

(4)

(L)(K)

(1)

(2)

(3)

7. SEWING

RH-9800 31

7-2. Sewing

CAUTION

Turn off the power switch at the following times, otherwise the machine may operate if the start switch is pressed

by mistake, which could result in injury.

When threading the needle

When replacing the needle

When not using the machine and when leaving the machine unattended

Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result

in personal injury or damage to the machine.

When carrying out automatic sewing for the first time, be sure to carry out a test sewing first.

1. Press the power switch (1) to turn on the power.

* The POWER indicator will illuminate and the TROUBLE indicator (2) will flash.

2. Press the RESET button (3).

* The TROUBLE indicator (2) will switch off and the feed bracket will move to the cloth setting position.

* If the buzzer sounds and "E-10" appears on the front panel display (J) at this time, turn the pulley to set the needle

to its upper position, and press the RESET button (3).

3. Press the PROGRAM NUMBER button (4) to select the desired program number. (Refer to page 20.)

4. Press the MODE button (5) to switch to automatic mode.

* The AUTO indicator (6) will illuminate.

5. Press the KNIFE button (7) to select cutting before sewing, OFF (no cutting) or cutting after sewing. (Refer to page 20.)

6. Place the material to be sewn under the cloth presser and press the cloth presser switch (8) to lower the cloth presser,

and then release the cloth presser switch (8).

7. Press the start switch (9). Sewing will then start.

8. When sewing is finished, the cloth presser will be raised.

To repeat this operation, repeat steps 6. and 7. above.

Note: After you have finished the machine and have turned the power off, the previous sewing data will still be

retained in memory even when the power is turned back on again. Thus you can continue with the same type

of sewing.

Check the thread tension after sewing. Refer to the following page.

1164Q 1165Q

(1)

(8)

(2) (3) (4) (6) (5) (7)

(9)

7. SEWING

RH-9800

32

7-3. Adjusting the thread tension

Turn off the power.

Never adjust the thread tension while sewing.

<Reference values>

Woolen materials + wool gimps

Denim (3 layers)

Upper thread tension 0.9 N 1.0 N

Lower thread tension 0.3 N 0.8 N

Thread take-up spring tension 0.05 N 0.07N

Thread take-up spring stroke 8 mm 8 mm

Upper and lower thread # 30 polyester # 30 cotton

* If you change the type of material being used, it may be necessary to change the thread tension.

The upper thread tension given above is the tension when the upper thread is pulled out from the thread path hole of

the thread take-up lever, and the lower thread tension is when the lower thread is pulled out from the needle hole in the

throat plate.

Upper thread tension Lower thread tension

Adjusting the lower thread take-up spring tension and stroke

Tension adjustment

Loosen the screw (3) and turn the thread take-up spring

support (4) in the direction indicated by the arrow to

increase the tension of the spring (5).

Stroke adjustment

Loosen the screw (6) and turn the thread take-up spring

guide (7) in the direction indicated by the arrow to

increase the stroke of the spring (5).

0934Q

0933Q

(1)

(2)

Turn the upper thread tension adjustment knob (1) in the

direction indicated by the arrow to increase the uppe

r

thread tension.

Turn the lower thread tension adjustment knob (2) in the

direction indicated by the arrow to increase the lower thread

tension.

(4)

0935Q

(3)

(6)

(7)

(5)

7. SEWING

RH-9800 33

7-4. Needle and knife position

The feed bracket is electronically controlled by means of pulse motors.

It is not necessary to change the position of the knife when switching between cutting before sewing and cutting after sewing.

It is not necessary to change the needle down position in order to keep enough space for cutting when cutting after

sewing has been selected.

Relationship between knife position and eyelet shape

1. When cutting before sewing, the inside needle down

position must be aligned accurately with the straight

line section of the eyelet (when the cutting space H is

0).

This is set correctly at the time of shipment from the

factory.

2. The shape of the eyelet is automatically changed

according to the shape of the knife for cutting before

and after sewing and for no cutting.

Eyelet shape (c X d)

Knife No.

Cutting shape

(a X b) Cutting before sewing

or off (no cutting) Cutting after sewing

1 2.1 X 3.2 1.9 X 2.8 2.4 X 3.9

2 2.8 X 4.3 2.4 X 3.9 3.3 X 4.6

3 3.0 X 4.6 3.2 X 4.1 3.6 X 4.8

4 3.2 X 5.4 2.8 X 4.7 3.6 X 6.1

5 Straight Straight Straight

6 3.8 X 4.3 3.2 X 3.6 4.0 X 4.5

3. At the time of shipment, the installation position for the

knife is adjusted to the position shown in the

illustration at left (when the cutting space H and the

knife position compensation value I are "0").

Explanation of the cutting space function

When cutting after sewing, this function moves the outer needle down positions in accordance with the knife shape so

that the seam is not cut by the knife.

1. When cutting after sewing, set the cutting space H to an

appropriate value so that the seam is not cut by the knife.

* The cutting space H should generally be set to

around 0.2 - 0.3. (Refer to page 24 for details on the

setting method.)

* The knife position compensation value I should be

set to "0".

Refer to "H. Setting the cutting space" and "I.

Setting the knife position compensation".

Strai

g

ht section

0936Q

a c

b d

Cutting shape (a X b) E

y

elet sha

p

e

(

c X d

)

Knife

0937Q

(When cutting before sewing) (When cutting after sewing)

Cutting space

0938Q

7. SEWING

RH-9800

34

Knife position compensation function

This function moves the knife with respect to the seam in

order to ensure that distances a and a' are equal.

1. When cutting before sewing, the difference between a

and a' will change depending on the cloth opening

amount.

2. Set the knife position compensation value I so that the

two are equal.

(Move the knife to the positive direction (+) when

increasing the cloth opening amount.

Refer to "I. Setting the knife position compensation" on

page 24.)

1166Q

a

a’

1167Q

Knife position

compensation

aa

a’ a’

a < a’ a = a’

7. SEWING

RH-9800 35

7-5. Using the production counter

The production counter is initially set to the counting up from zero method. It can display up to a maximum count of 9999.

* If DIP switch No. 4 inside the front panel is set to OFF, the counting up from zero method will be used. If DIP switch

No. 4 is set to ON, the counting down to zero method will be used.

Displaying the production counter 1. Press the MODE button (1) to switch to automatic

mode.

* The production counter will appear in the front

panel display (J).

Resetting the production counter Counting up from zero method

1. Press the MODE button (1) to switch to automatic mode.

2. Press the ENTER button (N).

* The units digit will start flashing in the display.

3. Press the RESET button (2).

* The units digit will change to "0" and the counter

value will be reset to "0".

Counting down to zero method

1. Press the MODE button (1) to switch to automatic mode.

2. Press the ENTER button (N).

* The units digit will start flashing in the display.

3. Press the "Up" button (L) or the "Down" button (K) to

set the value for the units column, and then press the

ENTER button (N).

Repeat this step for the tens, hundreds and thousands

columns.

* The production counter function can be stopped by

setting counter to “0000”.

* When the thousands column has been set, the

machine will return to normal automatic mode.

Note: If the counting down to zero method is used, further sewing will not be possible when the production counter

reaches "0", so a number greater than zero should always be set. The production counter can be returned to

the initial setting value simply by pressing the ENTER button (N).

* If you would like to change the production counter setting due to sewing errors, use the counting down to zero

setting procedure to set the production counter.

Standard position (Counting up from zero method) Reset position (Counting down to zero method)

1168Q

1019Q

(1)

(J)

1169Q

1170Q

(N) (2)

1171Q

1172Q

(K) (L)

(N)

7. SEWING

RH-9800

36

7-6. Using a cycle program

This example shows the procedure for a cycle program which runs program 1 (with the knife operating) three times and

program 3 (with the knife not operating) once.

Programming procedure

1. Press the MODE button (1) to switch to programming

mode.

2. Keep pressing the SELECT button (2) until " C "

appears in the program number display window.

* The number in the thousands column of the front

panel display (J) will start flashing at this time.

3. Press the "Up" button (L) or the "Down" button (K) to

change the value in the thousands column to "1", and

then press the ENTER button (N).

* Program number 1 will now be set, and the dot in

the thousands column will flash.

4. Change the flashing interval so that the illumination

time for the dot is longer than the switched-off time.

* Press the "Up" button (L) to make the illuminated

period longer, and press the "Down" button (K) to

make the illuminated period shorter.

5. Press the ENTER button (N).

* The dot in the thousands column will illuminate

steadily and the number in the hundreds column

will start flashing.

* When the dot is illuminated, the knife will operate,

and when the dot is switched off, the knife will not

operate. However, if the OFF indicator illuminates

during sewing, the knife will not operate even if the

dot is illuminated.

6. Repeat steps 3. to 5. for the hundreds and tens

columns.

7. Press the "Up" button (L) or the "Down" button (K) to

change the value in the units column to "3", and then

press the ENTER button (N).

* Program number 3 will now be set, and the dot in

the units column will flash.

8. Change the flashing interval so that the illumination

time for the dot is shorter than the switched-off time,

and then press the ENTER button (N).

* The dot in the units column will switch off and the

number in the thousands column will start flashing.

9. Press the MODE button (1) to switch to automatic

mode. The cycle program "1.1.1.3" will then be set.

* If you want to clear a cycle program, carry out steps 1. and 2. above and then press the RESET button. Then press the

MODE button (1) to switch to automatic mode.

1173Q

(1)(2)

(J)

(L)

(N)

(K)

1174Q

1175Q

1176Q1177Q

(1)

7. SEWING

RH-9800 37

7-7. Setting the feed bracket to the front position

Setting the material will be easier if the feed bracket is moved forward from the standard cloth setting position.

* Cycle time will be reduced with this setting, particularly if cutting after sewing is selected.

1. Turn off the power.

2. Set DIP switch No. 3 inside the front panel.

3. Turn on the power.

4. Press the RESET button (1).

5. The feed bracket will move to the front position.

6. Sewing can then be carried out as normal. (Refer to

page 30.)

7-8. Switching between single-pedal and dual-pedal operation

(Switching the foot controller)

The cloth presser can be lowered and the machine can start sewing just by pressing the start switch, without having to

use the cloth presser switch.

1. Turn off the power.

2. Change the setting of DIP switch No.5.

OFF: To use both pedals (cloth presser switch and

start switch)

ON: To use only one pedal (start switch)

3. Turn on the power and press the RESET button (1).

Sewing can then be carried out as normal.

Note: During single pedal operation, when the start

switch is pressed, the cloth presser is lowered

and sewing starts straight away.

1178Q

1179Q 1180Q

(1)

1179Q 1180Q

(1)

1181Q

7. SEWING

RH-9800

38

7-9. Using feed mode

In this mode, the feed bracket and the cloth presser can be moved while the needle is stopped.

It is useful for checking the relative positions of the throat plate and the cloth presser.

1. Press the MODE button (1) to switch to feed mode.

* "FEEd" will appear in the front panel display (J).

2. Press the cloth presser switch (2). The cloth pressers will be lowered.

3. Press the start switch (3).

The feed bracket (4) will move to the sewing start position.

* When the start switch (3) or the "Up" button (L) is pressed, the feed bracket (4) will move to the next sewing

position.

* If the "Down" button (K) is pressed, the feed bracket (4) will move to the previous sewing position.

* To return the feed bracket (4) to the cloth setting position while sewing:

1) Press the EMERGENCY STOP switch (5).

2) Press the RESET button (6).

Note: The knife will not operate during this time.

1184Q

1183Q

1182Q

(6) (1)

(K) (L)

(J)

(5)

(4)

(2)

(3)

7. SEWING

RH-9800 39

7-10. Using manual mode

In this mode, the needle and the feed bracket can be moved one stitch at a time by turning the upper shaft pulley by

hand.

It is useful for checking the positions of the needle and the looper after the looper timing has been adjusted.

1. Press the MODE button (1) to switch to manual mode.

* “H- ” will appear in the front panel display (J). ( represents the number of stitches remaining.)

2. Press the cloth presser switch (2). The cloth presser will be lowered.

3. Press the start switch (3).

* The knife will operate only when cutting before sewing has been set.

* The feed bracket (4) will move to the sewing start position.

4. Turn the upper shaft pulley (5) toward you.

The feed bracket (4) will move to the next sewing position in accordance with the rotation of the upper shaft.

Note: If the upper shaft pulley (5) is turned in the wrong derection, the feed bracket timing may become disrupted.

* To return the feed bracket (4) to the cloth setting position while sewing:

1) Press the EMERGENCY STOP switch (6).

2) Press the RESET button (7). The feed bracket (4) will then return to the cloth setting position.

5. Turn the upper shaft pulley (5) until the last stitch has been sewn. The buzzer will then sound.

Note: Check that the mark on the upper shaft pulley (5) is aligned with the notch in the pulley cover.

6. Press the start switch (3).

* The movement of the feed bracket (4), lower thread trimming and opration of the cloth presser will all be carried out

as a single step.

* The knife will operate only when cutting after sewing has been selected.

0783Q

(1)(7)

(J)

0784Q 0785Q

(6)

(4)

(2)

(3)

(5)

7. SEWING

RH-9800

40

7-11. Changing the cycle program counter

The cycle program counter can be easily changed if necessary, for instance because re-sewing was necessary.

1. If carrying out cycle sewing in AUTO mode, switch the

contents shown in the front panel display from the

production counter to the cycle program.

The program number which is to be sewn next will

flash in the display. To change the cycle program

counter (the position where the display is flashing),

press the "up" button (L) or the "down" button (K) to

make the desired setting.

* If you would like to switch the display from the cycle

program to the production counter, press the

SELECT button (M). The production counter will be

displayed while this switch is being pressed.

7-12. Setting the number of home position cycles

The number of home position cycles can be set in order to shorten the overall cycle time.

* This function is only valid when DIP switch No. 8 on the circuit board is set to ON.

1. Press the MODE button (1) to switch to program

mode.

2. Press the SELECT button (M) so that "HP" is

displayed in the front panel display.

* The display will change in the following order each

time the SELECT button is pressed:

→A → B P4 → HP

(Continued on next page)

1186Q

1185Q

(L)(K)

(M)

(J)

(1)

1188Q

1187Q

7. SEWING

RH-9800 41

3. Press the "up" button (L) or the "down" button (K) until

the desired number of home position cycles is

displayed.

The setting range is between 0 and 9.

* If the number of home position cycles is set to "5",

returning to the home position will occur once for

every five cycles.

However, when carrying out cycle sewing, the

machine will return to the home position once for

each cycle program regardless of the number of

home position cycles which have been set (unless

the setting is "0").

Normal home position cycling will not be carried out

if the setting is "0".

4. Press the ENTER button (N) to accept the home

position cycle setting. This setting will apply to all

program numbers from 1 to 9.

* The display will stop flashing and will start

illuminating steadily.

Note: If for some reason an excessive load is applied to the feed bracket which causes it to slip, then there is the

danger that this will have an adverse effect on subsequent sewing operations. Therefore, it is recommended that

you return to the home position for each cycle (i.e. that you leave DIP switch No. 8 on the circuit board set to

OFF).

7-13. Returning to the home position

This is useful for correction purposes when mistiming occurs in the home position cycle because re-sewing was carried

out.

* This function is only valid when DIP switch No. 8 on the circuit board is set to ON.

1. When at the home position in AUTO mode, press the

RESET button (1) to start sewing from the home

position.

(J)

(K)

(M)

(L)

(N)

1171Q

(1)

1189Q

8. CLEANING AND MAINTENANCE

RH-9800

42

8. CLEANING AND MAINTENANCE

CAUTION

Turn off the power switch before starting any cleaning work, otherwise the machine may operate if the start

switch is pressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not

get into your eyes or onto your skin, otherwise inflammation can result.

Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and

diarrhoea.

Keep the oil out of the reach of children.

8-1. Cleaning

If using an air gun, do not use it while the machine head is tilted back, otherwise oil and thread scraps may adhere to the

cutter sensor and timing belt, resulting in operating problems.

1. Turn off the power.

2. Turn the air cock to stop the air.

* Turn the knob to release the air.

3. Remove any thread scraps and dust, etc. from the thread paths for the needle thread, looper thread and gimp.

In particular, the looper thread path should be cleaned every day to keep it free from thread scraps and dust.

4. Check the oil level by looking at the sight glass. If the oil level is low, replenish the oil supply.

5. Remove and discard any oil that has collected in the oil container.

6. Check the air filter and remove any water that has collected in the drain.

(Refer to the illustration below.)

8-2. Draining the oil 8-3. Checking the air filter

1190Q

(1) 0946Q

(1)

(2)

0849Q

0848Q

1. When the oil container (1) is full of oil, remove the oil

container (1) and let the oil drain out.

Note: Clean up any oil that may have been spilt onto

the floor.

1. Close the air cock (1).

2. Turn the screw (2) to release any air and water in the

drain.

9. STANDARD ADJUSTMENTS

RH-9800 43

9. STANDARD ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing

machine should only be carried out by a qualified

technician.

Ask your Brother dealer or a qualified electrician to

carry out any maintenance and inspection of the

electrical system.

Turn off the power switch and disconnect the

power cord from the wall outlet at the following

times, otherwise the machine may operate if the

start switch is pressed by mistake, which could

result in injury.

When carrying out inspection, adjustment and

maintenance.

When replacing consumable parts such as the

loopers and knife.

Disconnect the air hoses from the air supply and

wait for the needle on the pressure gauge to drop

to "0" before carrying out inspection, adjustment

and repair of any parts which use the pneumatic

equipment.

If the power switch and air need to be left on when

carrying out some adjustment, be extremely

careful to observe all safety precautions.

If any safety devices have been removed, be

absolutely sure to re-install them to their original

positions and check that they operate correctly

before using the machine.

9-1. Adjusting the height of the spreader and looper

Spreader height

The clearance between the left spreader (forked spreader) and the left looper must be set to match the thickness of the

lower thread. The clearance between the right spreader and the right looper should be as small as possible while still

letting the parts slide.

1. The right spreader (1) and left spreader (2) move by means of springs (3). Adjust so that the spreaders move smoothly

between the right spreader stopper (4), the left spreader stopper (5) and the LS-holder bracket (6), with no looseness.

2. If adjustment is necessary, loosen the screw (7) and then move the right spreader stopper (4) or left spreader stopper

(5) up or down.

Looper height

1. Set the clearance between the left looper (8) and the left spreader (2) to the same distance as the thickness of the

lower (looper) thread.

2. The clearance between the right looper (9) and the right spreader (1) should be as small as possible.

3. If adjustment is necessary, loosen the screw (10) and then move the left looper (8) and right looper (9) up or down.

(2) (1)

(4)

(7)

(3)

(5)

(3)

(7)

(2)

(3)

(5)

(6) 0948Q

0947Q

(2)

(8)

(10)

(1)

(9)

(10)

0949Q 0950Q

9. STANDARD ADJUSTMENTS

RH-9800

44

9-2. Adjusting the needle and looper timing

The distance by which the needle bar rises from its lowest position to the position where the tip of the left looper and the

center of the needle are aligned should be the same as the distance from its lowest position to the position where the tip

of the right looper and the center of the needle are aligned.

Before adjusting the looper timing, first adjust the stitch width (needle racking width).

* Refer to "Adjusting the needle racking width (stitch width)" on page 48. The standard width is 3 mm.

1. Move the needle bar to its lowest position.

2. Use calipers to measure the distance between the end of the needle bar (1) and the top of the needle bar bracket (2)

when the needle bar is at its lowest position.

3. Turn the upper shaft pulley until the tip of the left looper (4) and the center of the needle (3) are aligned when the

needle (3) is at the inside sewing position, and then use the calipers to take the same measurement as taken in step 2.

Find the difference between the measurements taken in this step and in step 2.

4. Follow the same procedure as in step 3. above to find the difference between the two measurements when the needle

(3) is at the outside sewing position.

* When the needle (3) is at the inside sewing position, the tip of the left looper (4) should be aligned with the center of

the needle (3), and when the needle (3) is at the outside sewing position, the tip of the right looper (5) should be

aligned with the center of the needle (3).

* The distance from the end of the needle bar (1) and the top of the needle bar bracket (2) should be the same when

the needle (3) is at both the inside sewing position and the outside sewing position.

5. If adjustment is necessary, turn the race stand (6) in the direction indicated by the arrow in the illustration, loosen the

screw (7), and then move the looper link support (8) up or down to tilt the LS-holder bracket (9) to the left or right (in the

direction of the arrow).

Lowest position

of needle bar

(1)

(2) (3)

(4)

(3)

(5)

0951Q 0952Q 0953Q

(9)

(8)

(7)

(6)

0955Q

0954Q

When center of needle

and looper tip are aligned

9. STANDARD ADJUSTMENTS

RH-9800 45

9-3. Adjusting the loop stroke

The loop stroke is the distance the needle bar rises from its lowest position to the position where the tips of the left and

right loopers are aligned with the center of the needle. The standard loop stroke is 2.7 mm. (The loop stroke may need

changing depending on the material and thread being used.)

* Carry out the adjustment in "9-2. Adjusting the needle and looper timing" before making this adjustment.

1. In the same way as in "9-2. Adjusting the needle and looper timing", move the needle bar to its lowest position with the

needle at the inside sewing position, and then use calipers to measure the distance between the end of the needle bar

(1) and the top of the needle bar bracket (2).

2. Add 2.7 mm to the value obtained in step 1. above.

3. Touch the end of the calipers (A) against the top of needle bar bracket (2), and then turn the upper shaft pulley until the

end of the needle bar (1) touches the edge of the calipers (B). Check that the tip of the left looper is aligned with the

center of the needle at this time.

4. In the same way, check that the tip of the right looper is aligned with the center of the needle when the needle is at the

outside sewing position.

5. If the tips of the loopers are not aligned with the center of the needle, carry out the adjustment below.

Raise the machine head.

Loosen the two screws (3) of the lower shaft timing pulley, hold the upper shaft pulley so that it doesn't move, and then

turn the lower shaft cam (4) in the direction indicated by the arrow until the tip of the left looper (5) is aligned with the

center of the needle (6). Once they are aligned, tighten the two screws (3).

After adjusting, check that the screws have been adequately tightened.

Once this adjustment has been carried out, repeat the procedure given in "9-2. Adjusting the needle and looper

timing".

2.7 mm

(1)

(2) (B)

0956Q

(A)

(3)

(4)

(6)

(5)

0957Q 0958Q

9. STANDARD ADJUSTMENTS

RH-9800

46

9-4. Adjusting the height of the needle bar

The standard height for the needle bar is 2.5 mm. (The needle bar height may need changing depending on the material

and thread being used.)

1. Align the tip of the left looper (1) with the center of the needle (2) when the needle (2) is at the inside sewing position.

2. Remove the face plate.

3. Loosen the screw (3) of the needle bar clamp (5) and adjust the height of the needle bar (4).

* After aligning the tip of the left looper (1) with the top edge of the needle hole, lower the needle bar (4) 2.5 mm.

4. Adjust so that there is as little play as possible, and so that the needle bar clamp (5) and the needle bar horizontal link

(6) can maintain their oil films. This will help to ensure that the needle bar turns smoothly.

9-5. Adjusting the clearance between the looper and needle

Be sure to carry out this adjustment after changing the size of the needle.

The clearance between the tip of the looper and the needle should be 0.05 - 0.2 mm.

1. Loosen the looper screw (1) and then adjust the clearance.

* This clearance must be uniform while the race stand is rotating (through 360o ).

If the clearance is not uniform, adjust the turning center for the needle bar. (This adjustment is made at the time of

shipment from the factory.)

* After making the adjustment in step 1. above, carry out the adjustment procedure given in "9-7. Adjusting the

spreader mounting positions".

2.5 mm

2.5 mm

(2)

(1)

(4)

(5) (3)

0959Q 0960Q 0961Q

(6)

0.05 - 0.2 mm

(1)

0963Q

0962Q

9. STANDARD ADJUSTMENTS

RH-9800 47

9-6. Adjusting the needle guard

Be sure to carry out this adjustment after changing the size of the needle.

The needle must remain stationary with respect to the needle guard until the tip of the looper reaches the needle.

1. Loosen the screw (1) and then move the needle guard

(3) in the directions indicated by the arrows by an

appropriate amount in accordance with the thickness

of the needle (2).

Note: Adjust so that the looper clasps the upper

thread securely.

9-7. Adjusting the spreader mounting positions

1. Loosen the screw (3) and adjust the position of the left spreader stopper (4) so that the fork of the left spreader (1) is

aligned with the lower thread guide hole of the left looper (2).

2. Loosen the screw (7) and adjust the position of the right spreader stopper (8) so that the tip of the right spreader (5) is

aligned with the tip of the right looper (6).

Note: Both the left spreader (1) and right spreader (5) should be installed so that they do not project past the tips of

the left looper (2) and right looper (6) respectively.

(2)

(3)

(1)

0964Q

(1)

(4)

(3) (7)

(5)

(8)

(6)

(2)

0965Q

9. STANDARD ADJUSTMENTS

RH-9800

48

9-8. Adjusting the spreader timing

When the needle is at the inside sewing position, the left spreader should touch the left spreader stopper and stop

immediately before the needle bar reaches its lowest position.

When the needle is at the outside sewing position, the right stopper should touch the right spreader stopper and stop

immediately before the needle bar reaches its lowest position.

1. Raise the machine head.

2. Loosen the screw (1) and the nut (2), and then turn the

adjusting screw (3) to adjust the spreader timing.

3. After adjusting, tighten the nut (2) and the screw (1).

9-9. Adjusting the needle racking width (stitch width)

The needle racking width is set to 3 mm at the time of shipment from the factory.

1. Loosen the needle racking adjustment nut (1) and then adjust the needle racking width by sliding the adjustment screw

(2) vertically along the oval slot.

The stitch width becomes smaller as the adjustment screw (2) is moved upward.

Note: If the needle racking width is changed greatly, you should re-adjust the timing between the needle and the

loopers.

(Refer to "9-2. Adjusting the needle and looper timing".)

(2)

(3)

(1)

0966Q

Becomes smaller

Becomes larger

2 mm

3 mm

(2)

(1)

0967Q 0968Q

Neddle racking width 1.5 - 3.2 mm

9. STANDARD ADJUSTMENTS

RH-9800 49

9-10.

Changing the knife cutting length (Replacing the cutting block)

1. Grind or replace the cutting block after changing the knife cutting length.

* When replacing the cutting block with a new one, be sure to adjust the contact between the knife and the cutting

block. (Refer to the next page.)

2. Loosen the screw (1), and then remove the cutting block (2).

Because the knife cutting length is set in accordance with the length of the cutting block, grind the cutting block as

shown in (A ) in the above illustration.

Cutting block length A = Knife cutting length + 1.5 mm

3. When installing the cutting block, push in the pin (3) and then tighten the screw (1).

* Do not use knives with different numbers on the same cutting block. If knives with different numbers are used,

accurate cutting will not be possible and the knife will be damaged.

Changing in the cutting block operation time.

If cutting is not possible even when the air pressure is increased to 0.3 MPa, memory switch No. 18 can be used to

increase the cutting block ON time. (Refer to “6-6. Using the memory switch”.)

(1)

(3)

(2)

0969Q 0970Q

Illustration (A)

9. STANDARD ADJUSTMENTS

RH-9800

50

9-11.

Adjusting the contact between the knife and the cutting block

1. Remove the cutting block. (Refer to the previous

page.)

2. If the knife incision on the surface of the cutting block

is very deep, if there are two or more incisions on the

cutting block because different knives were used, or if

only part of the incision has been made, grind the

surface of the cutting block smoothly until a single

knife incision can still be seen faintly.

3. The cutting pressure over the whole of the cutting

block should be uniform so that the material will be cut

cleanly.

Grind the surface of the cutting block so that the knife

incision will be uniform over the whole of the cutting

block.

* The cutting block can be filed until its height is 19

mm.

4. If the material cannot be cut cleanly even though

the cutting block has been ground correctly,

check whether the tip of the knife is worn.

* If the tip is worn, replace the knife.

Do not use the old cutting block after the knife has

been replaced, otherwise it may damage the tip of

the knife.

Adjusting the contact between the knife and the cutting block

To see the knife incision more easily, color the cutting surface of the cutting block with a marker pen.

1. Operate the cutting block three times with the knife making a mark on it each time.

2. Adjust the position of the cutting block or contact between the knife and the cutting block until the knife consistently

makes a mark in the same place.

Filing the cutting surface of the cutting block

Use a flat file for filing.

1. Filing the cutting surface of the cutting block on which the knife incision breaks off or is shifted

1-1. Grip the cutting block in a vise.

1-2. File the surface of the cutting block smoothly until the knife incision is eraced away.

2. Filing the cutting surface of the cutting block in which knife incision is deep

2-1. Grip the cutting block in a vise.

2-2. File the surface of the cutting block smoothy until a single knife incision can still be seen faintly.

19 mm

3 mm

1. Knife incision

is correct

0971Q

0972Q

2. Knife incision

is too deep

3. Two knife

incisions

4. Partial knife

incision

9. STANDARD ADJUSTMENTS

RH-9800 51

9-12. Replacing the knife

When replacing the knife with a new one, file the surface of the cutting block until smooth and until the knife does not

leave a mark on the cutting block.

Before replacing the knife, be sure to check that there is no gap between the knife (1) and the knife stopper (2).

1. Loosen the screw (3), and then remove the knife (1).

2. Insert the new knife (1) into the knife stopper (2), and then tighten it with the screw (3).

3. Adjusting the contact between the knife and cutting block. (Refer to the previous page.)

Note: For L1 - L4 specifications, secure the knife stopper (2) in the position closest to you (the position indicated by the

dotted lines).

* When replacing the knife (1), make sure that the knife number matches the number for the eyelet shape.

Replace the knife and cutting block as a set.

If knives with different numbers are used on the same cutting block, accurate cutting will not be possible, and damage

to the knife may result.

9-13. Adjusting the cutting pressure

Adjust the cutting pressure to the minimum pressure that still allows the material to be cut.

* If the knife cutting length is 20 mm, sufficient cutting performance can be obtained with an air pressure of 0.2 MPa.

To adjust the cutting pressure, adjust the air pressure of the knife pressure adjustment regulator (1) which is mounted

underneath the work table.

* If the cutting pressure is increased to more than is

necessary, it will cause the cutting block to become

worn or the knife to become damaged.

* If the material cannot be cut cleanly, do not increase

the cutting pressure over the maximum limit. Check

the contact between the knife and the cutting block,

while referring to "9-11. Adjusting the contact between

the knife and the cutting block".

(L 1 - L 4)

(1)

(2)

(3)

0973Q 0974Q

0975Q

(1)

9. STANDARD ADJUSTMENTS

RH-9800

52

9-14. Adjusting the cloth opening amount

1. Loosen the screw (1), and then insert a screwdriver into the notch in the side of the feed bracket and turn the adjusting

screw (2) to adjust the opening amount.

2. After tightening the screw (1), measure the opening amount.

Note: Adjust so that the opening amounts for the left and right cloth presser plates are equal.

* It is usually sufficient for one cloth presser plate to open by 0.8 mm.

Measuring the opening amount

1. Switch the mode to feed mode. (Refer to page 20.)

2. Lower the cloth presser and then use calipers to measure the distance a.

3. Press the start switch. The feed bracket will move and then the left and right cloth presser plates will open.

4. Use calipers to measure the distance b.

5. The difference between a and b is the opening amount. (Opening amount = a - b)

(1)

(2)

(1)

(2)

0976Q 0977Q

(1)

(2)

(1)

(2)

0978Q 0979Q

9. STANDARD ADJUSTMENTS

RH-9800 53

9-15. Adjusting the trimming of the upper thread

The upper thread should be trimmed at the correct time after sewing is completed.

<-00, -01>

1. Adjust so that the upper thread trimmer knife (1) cuts

only one of the threads in front of the right looper (2).

Note: If both strands of the thread loop are cut, the

thread remaining in the needle may become

too short and skipped stitches may result.

<-02>

1. Adjust so that the upper thread trimmer knife (3) cut

only one of the threads in front of the right looper (4).

Note: If both strands of the thread loop (forward and

back) are cut, the thread remaining in the

needle may become too short and skipped

stitches may result.

9-16. Adjusting the trimming of the lower thread and gimp

<-00, -01>

The lower thread and gimp should be trimmed at the correct time after the feed bracket has returned to the home position.

Thread trimming operation can be checked in steps while manual mode is active. (Refer to “Using manual mode” on page 39.)

1. The mechanism is adjusted so that the lower thread and gimp are separated from each other and spread by the loop

spreader (1).

2. The lower thread is held between thread nipper M (2) and thread nipper D (3) on the plate spring.

The gimp is held between thread nipper M (2) and thread nipper U (4) on the plate spring.

3. Adjust so that the edge of the fixed knife (6) and the index mark (8) on the movable knife (7) are aligned when the

thread trimmer knife arm (5) is at the maximum stroke.

(2)

(1)

(3)

(4)

0980Q

0981Q

(6)

(1)

(7)

(4)

(2)

(3)

(7)

0983Q

0982Q

(5)

(4)

(2)

(3)

(6)

(8)

9. STANDARD ADJUSTMENTS

RH-9800

54

<-02>

The lower thread and gimp should be trimmed at the correct time after the cloth pressers rise at the feed home position.

Thread trimming operation can be checked in steps while manual mode is active. (Refer to “Using manual mode” on

page 39.)

1. The mechanism is adjusted so that the lower thread

and gimp are spread by the thread handler (1).

2. The movable knife driving cam (2) operates, and the

right movable knife (3) and left movable knife (4) mesh

and the thread is cut.

9-17. Adjusting the gimp length after trimming (-02)

Adjust so that approximately 4 mm of the gimp thread is

coming out from the throat plate (1).

1. Loosen the screw (2) and move the gimp thread guide

J (3) in the direction of the arrow to adjust the length.

(3)

(2) (4)

(1)

0984Q

Becomes longer

Becomes shorter

(2)

(3)

Approx. 4 mm (1)

0985Q

9. STANDARD ADJUSTMENTS

RH-9800 55

9-18. Lower thread presser (-02)

The lower thread presser (1) operates at the same time

as upper thread trimming is carried out.

The end of the lower thread is securely held between the

lower thread presser (1) and the throat plate (2).

9-19. Sub presser (-02)

Trimming of the lower thread and gimp is carried out

when the cloth pressers rise. The sub presser (1) endures

that the material does not move during thread trimming, in

order to maintain a stable thread length after trimming.

(2)

(1)

0986Q

(1)

0987Q

10. SUMMARY OF DIP SWITCHES

RH-9800

56

10. SUMMARY OF DIP SWITCHES

Always turn off the power supply before changing any of the DIP switch settings.

10-1. Front panel DIP switches

The ON/OFF positions of the DIP switches inside the front panel are checked only once when the power is turned on.

Any changes to the DIP switch positions will not be effective until the power is switched off and back on again.

No. ON/OFF Description

ON Program mode disabled

1 *1

OFF Program mode enabled

ON Spare

2OFF Spare

ON Front position

3OFF Back position

ON Counting down to zero

4OFF Counting up from zero

ON Pedal 1 operation

5OFF Pedal 2 operation

ON Compatible with normally closed-type emergency stop switch (new)

6 *3

OFF Compatible with normally open-type emergency stop switch (old)

ON Upper thread remaining amount = Large

7 *2

OFF Upper thread remaining amount = Standard

ON Spare

8OFF Spare

*1 The version of the PROM is given as “E1” or later.

*2 The version of the PROM is given as “D1” or later.

*3 The version of the PROM is given as “F1” or later.

If the position of DIP switch No. 4 is changed, the production counter will be reset to zero.

* The machine is shipped from the factory with the DIP switches set as follows.

1192Q

10. SUMMARY OF DIP SWITCHES

RH-9800 57

10-2. Circuit board DIP switches

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet

before opening the face plate of the control box. Touching areas where high voltages are present can result in

severe injury.

The ON/OFF positions of the DIP switches inside the front panel are checked only once when the power is turned on.

Any changes to the DIP switch positions will not be effective until the power is switched off and back on again.

Only one of DIP switch No.1, 2 and 3 is effective at any one time. They are effective in the order 1, 2, 3.

No. ON/OFF Description

ON Data initialization

1OFF Normal

ON Input check

2OFF Normal

ON Output check

3OFF Normal

ON Upper gimp guide present

4 *1

OFF Upper gimp guide not present

ON Upper thread nipper present

5 *2

OFF Upper thread nipper not present

ON Upper and lower thread trimming

6OFF Upper thread trimming

ON Material is remains pressed after sewing

7OFF Material is released after sewing

ON Needle bar returns to home position after set number of pieces sewn

8OFF Needle bar always returns to home position after each piece sewn

*1 The version of the PROM is given as “E1” or later.

*2 The version of the PROM is given as “D1” or later.

If the stitch length has been set to 39 mm or greater, it will be automatically changed to 38 mm if DIP switch No. 6 is

changed to ON.

* The machine is shipped from the factory with the DIP switches set as follows.

1193Q

11. TROUBLESHOOTING

RH-9800

58

11. TROUBLESHOOTING

If there is a problem with operation, first check that the threads are correctly threaded and that the needle is correctly

installed.

CAUTION

Turn off the power switch and disconnect the power cord before carrying out troubleshooting, otherwise the

machine will operate if the start switch is pressed by mistake, which could result in injury.

MACHINE HEAD

Problem Cause Remedy Page

Thread tension control nut

pressure is too strong. Adjust to an appropriate pressure. 32

Thread is of poor quality. Use a better-quality thread.

Thread is too thick for the needle. Use a differently-size needle.

Needle groove or needle hole are

not smooth. Replace with a new needle. 16

Needle and looper adjustment is

incorrect.

Adjust the needle bar height or

the looper and spreader height. 43

Thread breaks.

Needle, looper, throat plate or

thread path is damaged.

Repair the damage with an

oilstone or buffer, or replace the

damaged part.

Thread tension control nut

pressure is too strong or too

weak. Adjust to an appropriate pressure. 32

Needle point is broken or bent. Replace with a new needle. 16

Needle and looper adjustment is

incorrect, or clearance is incorrect. Adjust correctly. 44

Needle and needle guard

adjustment is incorrect. Adjust correctly. 47

Skipped stitches occur.

Looper tip is blunt. Repair with an oilstone or replace

the looper with a new one.

Needle is bent. Replace with a new needle. 16

Needle and looper adjustment is

incorrect. Adjust the needle bar height or

the looper and spreader height. 43

Needle breaks.

Needle and needle guard

adjustment is incorrect. Adjust correctly. 47

11. TROUBLESHOOTING

RH-9800 59

Problem Cause Remedy Page

Knife is blunt. Replace with a new knife. 51

Knife does not move to the full

stroke because air pressure is too

weak. Adjust the air pressure. 51

Upper thread trimmer knife is not

picking up the upper thread.

Install the upper thread trimmer

knife so that it cuts only one side

of the upper thread loop. 53

Movable knife is not picking up

the needle thread because the

last stitch is being skipped.

Refer to the remedies given under

“Skipped stitches occur” in this

troubleshooting chart. 58

Upper thread is not cut.

Movable knife position is

incorrect. Adjust the position of the movable

knife or the loop spreader. 53

Knife is blunt. Replace with a new knife. 51

Knife does not move to the full

stroke because air pressure is too

weak. Adjust the air pressure. 51

Lower thread is not cut.

Movable knife position is

incorrect. Adjust the position of the movable

knife or the loop spreader. 53

Thread nipper spring force is too

weak. Adjust the force of the thread

nipper spring. 53

Upper thread length is too short

after trimming.

Install the upper thread trimmer

knife so that it cuts only one side

of the upper thread loop. 53

Needle and looper adjustment is

incorrect. Adjust the needle bar height or

the looper and spreader height. 43

Thread slips out of the

needle at the sewing

start.

Not enough upper thread is being

fed out. Adjust the amount of upper thread

being fed out. 45

Cutting pressure is too weak. Adjust the cutting pressure so that

it is strong enough. 51

Knife and cutting block are not

contacting properly. Grind the cutting block surface. 50

Knife is blunt. Replace with a new knife. 51

Material is not being cut

cleanly.

Cutter arm operation time is too

short.

Make the operation time longer by

changing the memory switch

setting. 49

INSTRUCTION MANUAL

15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177

Printed in Japan

BROTHER INDUSTRIES, LTD.

118-980

S91980-302

2001.11. H (1)