SERVICE MANUAL

MODEL BLE3ATW

Vol. 2.0

From

To

Serial Numbers

K6 104551 101141103681 101141

U.S.A. Canada EU Au. N.Z

1.Construction of Covers

1

4.6

2.0

1

72.8

5.3

4.8

8.6

1.8

12.5

55.7

11.5

11.2

10.6

Heigh

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Heigh

t of p

ress

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ot

Distan

ce of

chain

loop

ertip

from

right

side o

f cha

in rig

ht ne

edle

(BLE

5, BL

E8W

)

Distan

ce of

chain

loop

ertip

from

right

side o

f cha

in rig

ht ne

edle

(BLC

S(3))

For B

LE5,B

LE8W

For B

LE3A

TW

For B

LCS(

3)Fo

r BLE

1SX,

DX,

AT

Heigh

t of

feed d

og

Distance of lower looper tipfrom center of lower looper shaft

Distance of chain looper tipfrom center of chain looper shaft(BLE5, BLE8W)

Distance of Upper looper tip From right side of right needle

Distance of lower looper tipfrom right side of right needle(SX, DX, AT, ATW)

Distance of lower looper tipfrom right side of right needle(BLE5, BLE8W)

New Adjusting Gauge

2. Ad

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f Nee

dle,Lo

wer lo

oper,

Upp

er lo

oper,

Chain

lopp

er &

Pre

sser

foot

R55.7+0.1

Heigh

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Need

le pla

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11.2+0.1

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8.6

Adjus

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oper

and u

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Lowe

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justm

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Max.

8.5

Need

le gu

ard

adjus

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t0.8

+0.3

+0.1

0

00Need

le 2.0

Fron

t nee

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ardBack

need

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ard

5.3+0

.1

Righ

t Nee

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Righ

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Org

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Ax1

SP

#14

/CR

(#90

)

Org

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Ax1

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)

Org

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2

4.5+0.2

Before adjustment of Thread delivery System(ATD)In case you can not get the proper stitches, please check the following items before you adjust the Thread Delivery System.

a) Is thread positioned between discs? Double check the thread position.b) Does spring in the head thread guide catch thread properly?

BLE1AT’s head thread guide is exclusive for BLE1AT. You can not use other head threadguides for LX,DX,SX on BLE1AT.

c) Is senser cable positioned on rollers?Double check each sensor cable is positioned on rollers especially the one in the back of finetuning screw.

d) Is stitch selector dial positioned correctly?e) Is each thread threaded correctly according to the quick threading reference guide?

3. Adjustment of Thread Delivery Unit 3-1 OPEN-SHUT TIMING OF TENSION DISCS

CORRECT TIMING - When upper looper is lowest position, front tension discs should be just shut perfectly.

How to adjust timing a) Loosen 2 pcs of thread delivery unit timing pulley fixing screw . b) Rotate the machine pulley and lower the upper looper at the bottom. c) Turn the thread delivery cam toward you until the front thread press disc shuts.

fit the thread delivery unit timing pulley.Note :The screws of thread derivery cam and thread derivery changing cam

should be placed in line.

3-2 CLEARANCE A AND B FOR THREAD PRESS POST ARM CORRECT CLEARANCE – 0.4mm (both front and rear)

How to adjust clearanceA) Rear clearance adjustment (You are required to adjust this adjustment first.)

a) Rotate the machine pulley and rear tension discs at the shut position.b) Loosen fixing screw of thread delivery changing cam .c) Make a clearance of 0.4 mm between rear thread press driving arm and thread

press disc shaft.d) Move the thread delivery changing cam to rightward and tighten screws firmly.e) Rotate the machine pulley and make sure the clearance of 0.4mm between the rear

thread press driving arm and thread press shaft.

B) Front clearance adjustmenta) Rotate the machine pulley and front tension discs at the shut position.b) Loosen fixing screw of front thread press driving arm1 .c) Make a clearance of 0.4 mm between the front thread press driving arm 2 and

thread press disc shaft.e) Tighten fixing screw firmly.f) Rotate the machine pulley and make sure the clearance of 0.4mm between the

front thread press driving arm 2 and thread press shaft.

Note : After adjusting rear and front clearance, make sure clearance of 0.9 mm between the discs.

3

d) Tighten 2 pcs of thread delivery unit timing pulley fixing screw and make sure to

6

7

7 8

8

8

9

9

13

Rear clearance adjustment A

Front clearance adjustment B

Shut position

Shut position

0.4

0.4

Openposition

Openposition

4

5

6

7

8

0.9mm 0.4mm

4

3

1 2

9

3

1 2

9

8

3-3 HOW TO REPLACE THE TIMING BELT OF THREAD DELIVERY UNIT (see P6) a) Loosen the presser foot joint link fixing screw A( 24 upper screw).b) Loosen the thread delivery unit fixing screw .c) Remove 2 pcs of the thread delivery unit fixing screw . d) Push the thread delivery unit downward and remove the timing belt of thread delivery unit .

Then, remove the motor belt and you can replace the timing belt of thread delivery unit. e) Return 2 pcs of the thread delivery unit fixing screw .

You are required to adjust the clearance at 1mm between handle and the timing pulley. (E)f) Tighten the screw and screw A( 27 upper screw).g) Adjustment of timing see P.3, 1-1

3-4 HOW TO REPLACE THE THREAD DELIVERY UNIT (see P.6)a) Remove the selector knob link fixing screw & spacer . b) Remove 3 pcs of sensor cable B, C & D. c) Remove 3 pcs of thread delivery unit fixing screw & . d) Remove the thread delivery unit timing belt and you can remove the thread delivery unit from

the machine.e) Replace the thread delivery unit and assemble each part in the order of d) - c) - b) - a).f) Make sure that the 3 pcs of sensor cable are exactly in the roller.g) After you replace the thread delivery unit, you are required to adjust and check following items;

1) Adjustment of timing (see P.3, 1-1) 2) Check the stitches (see P.9, 2).

3-5 HOW TO REPLACE THE SPRINGS OF THREAD DELIVERY UNIT (see P.6) a) Stitch connecting arm plate spring Hook the spring both sideb) Looper thread pulling plate spring Hook the spring both sidec) Thread pulling movable spring

Remove the edge of hook of thread pulling movable spring , loosen the fixing screw and replacethe spring and space at the same time.

d) Disc press spring (both front and rear)1)Remove 5 pcs. of E-ring of the thread press disc shaft and pull out the press disc shaft leftward.

Becareful not to splash the spring. 2) After you replace the spring , insert the thread press disc shaft slowly from the right side. 3) Pushing the thread press disc shaft from the right side, rotate the machine pulley until the

thread press driving arm reaches the far left. 4) Replace 5 pcs. of E-ring.5) Make a clearance of 0.4mm between the thread press driving arm and thread press disc

shaft . (see P3, 1-2)

2

5

23

3

1 16

2

30 29

2 316

1415

99

1011

12

12

6

15 5 4

12

3

16

1011

14

1

229

30

23

24

2527

28

26

9

13

2122

1918

17

20

6 78

A

3-6 REPLACEMENT OF SENSOR CABLE (see P.8) Needle thread and looper thread sensor cable consists of 113 pcs of fine stainless wire and itspulling strength is 13kg (3 lb.). Therefore, it is almost unnecessary to replacethe sensor cable. In case you replace the cable, refer the followings;

There are 3 types of sensor cable and each cable is different length.* Fabric thickness sensor cable 3 Mono wire* Needle thread sensor cable 2 about 320mm (12 inch.) * Looper thread sensor cable 1 about 498mm (20 inch.)

a) Replacement of fabric thickness sensor cable 31) Remove the cable 2) Hook the cable both side. 3) Check the stitches (see P.9, 4).

b) Replacement of needle thread sensor cable 21) Move the stitch joint arm plate B to the right and remove the needle thread sensor cable2. 2) Replace the cable and make sure that the cable is in each 4 grooves of guide roller. 3) Check the stitches (see P.9, 4).

c) Replacement of looper thread sensor cable 11) Move the looper thread pulling plate C to the left and remove the looper thread sensor

cable1. 2) Replace the cable and make sure that the cable is in each 5 grooves of guide roller. 3) Check the stitches (see P.9, 4).

3

7

45

13

6

1615

32

1

5

7

1817

5

20

19 23

5

21

24

22

109

45

12 48

11

14

8

4. ADJUSTMENT OF STITCHESfabric : cotton 1-layer thread : 100% polyester spun thread (maxi-lock or metrosene thread) needle : SCHMETZ HAX1SP #11/CR machine: 1-needle (right), 3-thread sewing width : 5.0mm (max) length : 3.0mm D.F. : N stitch selector : B

4-1 ADJUSTMENT OF NEEDLE THREAD SENSOR CABLE

The needle thread sensor cable effects the timing of both needle thread andlooper threads. You are required to adjust this cable first.

NOTE: The needle thread sensor cable adjusting screw works; Turn clockwise and both needle & looper threads become loose. Turn counter-clockwise and both needle & looper threads become tight.

a) Line up the looper thread fine-tuning screw at the standard position.b) Sew 1-layer of cotton with 1-needle (right) 3-thread as shown in the above

and adjust only the needle thread in the stitch not to have a puckering. Disregard the looper threads in the stitch at this stage.

c) Then, adjust the looper thread sensor cable (4-2).

4-2 ADJUSTMENT OF LOOPER THREAD SENSOR CABLE Before the adjustment of looper thread sensor cable, adjust the needle thread sensor cable first (4-1).

NOTE: The looper thread sensor cable adjusting screw works; * Turn clockwise and looper threads become loose. * Turn counter-clockwise and looper threads become tight.

a) Line up the looper thread fine-tuning screw at the standard position.b) Sew 1-layer of cotton with 1-needle (right) 3-thread as shown in the previous page and turn the

screw until you get the ideal stitch which looper threads are not loose and fabric is not curled. c) After adjustment of looper thread sensor cable, the timing of needle thread

might be changed. Therefore, check the needle thread sensor cable again (see 4-1).

9

Needle thread sensor cable

Looper thread sensor cable

Looper thread sensor cableadjusting screw

Needle thread sensor cable adjusting screw

Standard Position

Fine Tuning screw

10

Turn Clockwise Become LooseTurn Counter-clockwise Become Tight

5. ADJUSTMENT OF NEEDLE THREADER (see P12)Before you adjust the needle threader, you are required to exchange the new needles of SCHMETZ HAX1SP #14CR as the bent needles or different needles cause the incorrect timing of needle threader. Also, you are required to make sure that needles are positioned in the needleclamp holder correctly.

5-1 REPLACEMENT OF NEEDLE THREADERa) Remove the needle threader hook fixing screw and replace the hook . b) Insert the hook until the end of needle threader selector plate and tighten the needle

threader hook fixing screw . c) Change the needle threader select plate right and left, and make sure if the needle threader

works both for right and left needles.

5-2 ADJUSTMENT OF HIGH AND LOW DIRECTION FOR NEEDLE THREADERa) Lock the machine.b) Make sure that the needle threader hook is positioned until the end of needle threader

select plate . c) Bend the place A on needle threader holder and adjust the direction of high and low for the

needle threader. d) Change the needle threader select plate right and left, and make sure if the needle threader

works both for right and left needles.

5-3 ADJUSTMENT OF RIGHT AND LEFT DIRECTION FOR NEEDLE THREADERa) Lock the machine.b) Loosen the screw and move the needle threader holder right and left until the needle

threader works properly. c) Tighten the screw . d) Change the needle threader select plate right and left, and make sure if the needle threader

works both for right and left needles.

3-4 ADJUSTMENT OF NEEDLE THREADER SAFETY PLATEa) Align the green marks on the pulley.b) Loosen the screw and adjust the position of washer (14 upper washer) in order to make

the needle threader safety plate lowered smoothly when the needle threader lever is lowered.c) Tighten the screw . d) Rotate the machine pulley and make sure that the needle threader lever is not lowered

when the needles are not in the highest position.

11

22 2020 28

28

28

28

28

22

20

23

24

24

23

19

19 A32

32

12

31

29

30

28

25

23

27

26

24

222120

33

323534

36

6

12

8

4 3

2

1

10

119

1314

1516

17

19

5

18

76

A

6. Checking threading steel pipe joint (see p .14)

a) Set the machine for looper threading.b) Move the lock button release lever slightly to the right.c) Check the connecting point whether the looper threading pipe joint and threading

steel pipe is fitted each other properly.

7. Checking pump7-1 Checking deflate from pump

Holding the pump tube 6 , push down the pump lever 15 and check if air is deflated frompump or not.

7-2 Replacement of Piston Cap

a) Bring the pump lever to the lowest position and fix it with Scotch tape or something like that.b) Remove bace plate. c) Remove piston driving arm fixing screw 11 (SM3005ZU). d) Remove piston driving arm from piston driving shaft.

(It will be easy to remove the arm from the shaft, if you push the shaft to the rightwarddirection.)

e) Remove piston assembly from cylinder (It will be easy to remove piston assenbly from cylinder, when the needle is in the lowestposition.)

f) Replace piston cap.g) Greace piston cap a little bit.(MOLYKOTE EM-50L) h) Return piston assembly to cylinder.i) Fit piston driving arm to piston driving shaft properly and tighten fixing screw 11 (SM3005IK) firmly.

(It will be easy to fit the arm to the shaft, if you push the shaft to the leftward direction.) j) Check and confirm whether the pump works properly or not.k) fix bace plate.

6

13

3

5

4

3

9

8

15

1213

4

17

2

1

6

10

14

11

16

7

14

5.53.0

Fixing screwof Knife holder

Fixing screwof knife drivingshaft

Knife drivingshaft

0.5mm

8. CUTTING WIDTH ADJUSTMENT

a) Cut 1 layar cotton fabric and make a cutting width 3.7 0.1mm between the eye of needle and the edge of fabric.

b) Cutting width adjustment Loosen fixing screws of knife holder, and knife driving shaft.

Turn Knife driving shaft crockwise or counter-clockwise.

Make sure cutting width.

c) Rotate the stitch width dial to min. 3.0/5.5mm, distance between lower knife and needle plate is more than 0.5mm.

Machine SettingsNeedle : Right Needle(O2)Thread : No UseStitch Width : MStitch Length: 2.5Differencial feed : NFabric : Cotton broad 1 layer

3.7 0.1mm

+

+

15

180

Pin

Chaining tongueholder pin

Chaining tongueholder

Chaining tongueholder pin

Adjusting chainingtongue

Adjusting chainingtongue

Screw

A B

9. How to replace adjusting chaining tongue

a) Move the pin to leftward.

b) Remove chaining tongue holder set with adjusting chaining tongue.

c)Loosen screw of adjusting chaining tongue and remove holder pin. Replace the adjusting chaining tongue with new one.

d)Make pararell between "A" (flat side of chaining holder pin) and "B" (top surface of adjusting chaining tongue), and tighten the screw temporary.

e)Replace chaining tongue holder set, and make sure that top of adjusting chaining tongue is parallel with needle plate.

f)Remove chaining holder set again, tighten the screw firmly.

g)Replace chaining holder set.

Chaining tongue holder set

16

10. TROUBLE SHOOTING

10-1 NEEDLE THREADS ARE UNBALANCED ;* Is the serger threaded correctly? See Quick Reference Guide* Are the threads snapped in the head guide? See Instruction Book P.12* Is the stitch selector positioned correctly? See Quick Reference Guide* Is the looper thread fine-tuning screw positioned correctly?

See Instruction Book P.13* Are the threads recommended high quality? See Instruction Book P.7 * Is the needle thread sensor cable positioned correctly? See P7, 3-6* Is the needle thread sensor cable adjusted correctly? See P9, 4

10-2 LOOPER THREADS ARE UNBALANCED ;* Is the serger threaded correctly? See Quick Reference Guide* Are the threads snapped in the head guide? See Instruction Book P.12* Is the stitch selector positioned correctly? See Quick Reference Guide* Is the looper thread fine-tuning screw positioned correctly?

See Instruction Book P.13* Are the threads recommended high quality? See Instruction Book P.7

* Is the serger threaded correctly? See Quick Reference Guide* Are the threads snapped in the head guide? See Instruction Book P.12* Is the stitch selector positioned correctly? See Quick Reference Guide* Is the looper thread fine-tuning screw positioned correctly?

See Instruction Book P.13* Are the threads recommended high quality? See Instruction Book P.7

* Is the looper thread sensor cable positioned correctly? See P7, 3-6* Is the looper thread sensor cable adjusted correctly? See P9, 4

10-3 THREAD BREAKS ;

10-4 NEEDLE THREADER WORKS IMPROPERLY ; * Are the needles inserted until the end of clamp holder? See P11, 5* Is the height of each needle correct? See P 2 * Is the adjustment of needle threader correct? See P11, 5

10-5 JET AIR THREADER DOES NOT WORK*Is air deflated from pump? See P13, 7 *Are pipes connected properly? See P13, 6*Are there any lints or thread in pipes?

10-6 WAVE STITCH IS NOT FORMED;*Is the machine threaded correctly? See Quick Reference Guide *Is the machine set for 3-Thread Wave stitching? See Instruction Book P.33*Is the Wave Selector shows "W" ? See Instruction Book P.33

17

*For Rolled Wave Edging, is the stitch length dial set for "ROLLED HEM" ? See Instruction Book P.35*Is the Stitch Selector set correctly? Set the Stitch Selector at "B" for 3-Thread Wave Stitch or "C" for 3-Thread Rolled Wave Stitch. See Instruction Book P.34,35