JUKI 35800 Series, Engineer'S Manual

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5-3) Poorly tense stitches 3-A) Needle A-1)Needle top blunting, Replace the needle.
for needle thread needle bent, check UY130GS
the needle in use.
3-B) Lower looper B-1)Lower looper brade Replace any item if it has
point blunting or been modified or its shape
insufficient polishing has changed.
3-C) Needle height C-1)Improper needle Refer to the adjustment values.
bar height
3-D) Threading D-1)Threading error 6. Refer to "How to conduct
threading".
3-E) Needle thread E-1)Insufficient thread Increase the thread tension.
tension tension
3-F) Lower looper thr F-1) Excessive thread Reduce the thread tension.
ead tension tension
3-G) Bobbin thread G-1)Insufficient take-up Increase the take-up amount
guide path amount of the bobbin of the bobbin thread.
thread
3-H) Bobbin thread H-1)Delayed bobbin Advance the bobbin thread
cam hread cam position cam position to the proper level.
5-4)Sewing jam 4-A) Regulating spring A-1)Insufficient presser Adjust the presser bar pres-
of presser bar bar pressure sure properly.
pressure
4-B) Feeder height B-1)Extremely low Make the feeder height proper.
feeder Refer to the standard adjustment
values.
4-C) Pressure regulating C-1)Insufficient pressure Adjust the presser bar pres-
spring of upper adjustment sureproperly.
feed roller
4-D) Upper feed roller D-1)Insufficient drawing Adjust the drawing amount
amount properly.
5-5)Problems with cahin- 5-A)Throat plate A-1)Not smooth thread Perform modification or replace
off thread running due to blunt the deformed part.
throat needle hole
5-B) Lower looper B-1)Lower fancy stitch Refer to the adjustment values.
adjustment skipping due to
insufficient lower
looper adjustment
5-C) Needle thread C-1)Insufficient needle Increase the thread tension.
tension thread tension
5-D) Threading D-1)Threading error 6. Refer to "How to conduct
threading".
5-E) Drawing amount E-1)The thread drawing Increase the thread drawing
of upper feed roller amount is insufficient. amount.
Refer to the adjustment values.
5-F) Clearance toward F-1) Clearance is too Adjust the clearance to a standard
the upper feed much between the level.
roller upper feed roller and Refer to the adjustment values.
the upper face of
the throat plate.
5-G) Pressure regulating G-1)Insufficient pressure Adjust the presser bar pres-
spring of upper adjustment sure properly.
feed roller
Trouble (1) Trouble (2) Cause (1) Cause (2) Check and corrective measures
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