JUKI MO-6000G Series Engineer's Manual page 90

Trouble Case (1) Case(2) Check and Corrective measures
Page
20. Uneven material lead Presser fool pressure
The presser foot pressure Is too high.
Reduce the presser loot pressure except for the uneven
material feed due to packering,
Presser foot
The hinge is too stiff.
Remove the sllffness provided no hinge play is produced.
Scratches on or dafective flnlsh on the presser loot sole Buff the presser foot sole for good surface finish.
produce friction between lhe presser foot and materials.
TIit of feed dogs The front is too high. Make the front down. However, be sure to align the
24
differential feed dog wllh the main feed dog.
Height of feed dogs A different In level exists between the main teed dog Eliminate the difference In level.
24
and dilferenlial feed dog.
Adjustment ol differential feed The differential feed has been improperly adjusted. Provide differential feed suited to the material.
21. Puckering Needle
The needle is too thick. Use a thin needle as much as possible.
(Malnly concemed with double chain stJIch)
Thread The thread used is too thick. Use a thin needle as much as poSSlble.
Thread tension
Bolh the needle thread and looper thread tensions are Reduce the both thread tensions to a minimum.
00
too high.
c.n
Throat plate The throat plate has a large needle hole. Replace the throat plate
with
one
with
a small needle hole.
Thread cam timing
The thread cam timing is too late.
Advance the cam timing. Refer to !he related Standard
Adjustment.
Feed dogs
The leading edge of the feed dog teeth has been Replace the feed dog.
rounded off.
A difference in level exists between lhe main feed dog Ellmlnate such difference in level. 24
and differential feed dog.
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