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– 9 –

3-15. automatic thread trimmer

(1) adjusting the position of the moving knife

When the presser has completely lfted at the stop-
moton poston (

refer to 

"3-14. adjusting the posi-

tion of the stop-motion", p.8

), t s the standard 

that the clearance between thread trmmng con-
nectng plate (front) 

1

 and the end face of the slt of 

throat plate 

2

 s 10 to 11 mm. To adjust the afore-

mentoned clearance, tlt the machne head, remove 
the ol sheld, loosen two nuts 

3

 and move connect-

ng screw 

4

 back or forth. When you tghten nuts 

3

ensure that jont 

5

 stays n the horzontal poston.

3-16. clearance between the button clamp lifting lever and the adjusting screw

Provde a 0.5 mm clearance between the end face of 
button clamp lftng lever 

1

 and adjustng screw 

2

 

at the stop-moton poston (

refer to "3-14 adjusting 

the position of the stop-motion", p.8

) and tghten 

wth adjustng screw nut 

3

.

3-17. How to set the l-shaped lifting rod

 

Put movng knfe push-back sprng 

2

, stop-moton 

rubber cushon washer 

3

, stop-moton rubber cush-

on 

4

 and stop-moton rubber cushon washer 

5

, n 

ths order, to L-shaped lftng rod 

1

. Make the jaw 

of the machne arm come nto close contact wth the 
end face of the stop-moton rubber cushon washer 
at the stop-moton poston (

refer to "3-14 adjust-

ing the position of the stop-motion", p.8

) and set 

the L-shaped lftng rod wthout a play. Then tghten t 
wth screw 

6

.

WarnInG :

to protect against possible personal injury due to abrupt start of the machine, be sure to start the 

following work after turning the power off and ascertaining that the motor is at rest. 

2

3

0.5 mm

1

2

5

4

3

6

1

1

2

5

4

3

10 to 11 mm

Summary of Contents for MB-1373

Page 1: ...ENGLISH Instruction Manual...

Page 2: ...umber of stitches 8 3 14 Adjusting the position of the stop motion 8 3 15 Automatic thread trimmer 9 1 Adjusting the position of the moving knife 9 3 16 Clearance between the button clamp lifting leve...

Page 3: ...le used TQx1 16 14 to 20 TQx7 16 14 to 20 Lubricating oil JUKI New Defrix Oil No 1 Noise Workplace related noise at sewing speed n 1 500 min 1 Lpa 84 dB A Noise measurement according to DIN 45635 48 B...

Page 4: ...the machine belt to be clogged with oil to prevent it from the deterioration 1 9 2 3 5 6 7 1 0 8 2 4 5 6 3 2 2 Lubrication 1 Open the side cover and apply JUKI New Defrix Oil No 1 to the portions show...

Page 5: ...cover with screw 2 2 4 Attaching the needle bar cover WARNING To protect against possible personal injury due to abrupt start of the machine be sure to start the following work after turning the power...

Page 6: ...ther loosen screw 2 in the tension thread guide and adjust it properly WARNING To protect against possible personal injury due to abrupt start of the machine be sure to start the following work after...

Page 7: ...ng the power off and ascertaining that the motor is at rest 3 6 Needle to looper relation If the formation of seams at the start of sewing is failed and the seams are formed on the way even when the t...

Page 8: ...lifting hook and move button clamp lifting hook 4 up or down 3 9 Work pressing force The standard work pressing force is by providing a 28 5 to 29 5 mm between the top end of nut 1 and the bottom end...

Page 9: ...onding amount Then tighten nut 2 Phenomenon Height of thread floating bar 1 When the stitch made on the wrong side of the workpiece is too loose Make the needle bar slightly higher 2 When the thread i...

Page 10: ...stitches loosen stitch number adjusting screw 1 and fix it to the position as shown in the illustration How to adjust 16 stitches How to adjust 32 stitches 2 1 3 4 A B 3 14 Adjusting the position of t...

Page 11: ...amp lifting lever 1 and adjusting screw 2 at the stop motion position refer to 3 14 Adjusting the position of the stop motion p 8 and tighten with adjusting screw nut 3 3 17 How to set the L shaped li...

Page 12: ...stopper 4 so that outside periphery 1 of the needle hole almost aligns with top end 2 of the knot tying plate 3 Adjusting the knot tying notch Loosen screws 1 and adjust so that the roller of the kno...

Page 13: ...angeover of with without knot tying To make with knot tying pull knot tying changeover knob 1 toward the front and place it to the position in the figure To make without knot tying pull knot tying cha...

Page 14: ...ze General MB 1373 MB 1377 Z201 Z202 Z033 Z037 Schematic drawing Remarks Button size A 3 to 6 5 mm B 20 to 28 mm Button size A 3 to 5 mm B 12 to 20 mm Button diameter Less than 16 mm Shank size Thickn...

Page 15: ...shank button holding clamp 5 provides proper pressure 4 You may fix button clamp block 7 in a convenient position for operation 1 When you fix the thrust collar ensure that button clamp rotating shaft...

Page 16: ...et the lengthwise feed to 0 4 Attachment for snaps Z037 INSTALLATION Remove the button clamp mechanism assembly and the feed plate Set both the crosswise feed and lengthwise feed graduated plates to 4...

Page 17: ...4 You may fix button clamp block 5 in a convenient position for operation 1 When you fix the thrust collar ensure that button clamp rotating shaft 6 does not play axially in its bracket 2 Adjust lift...

Page 18: ...ng plate Adjustment of the knot tying notch 3 The nipper has been improperly adjusted The clearance is too large Adjust the nipper with the nipper bar block 5 The first stitch trails relatively long t...

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