Adjusting The Looper Thread Trimming - JUKI MEB-3200 Instruction Manual

(9) Adjusting the looper thread trimming

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
At the time of delivery or when the following presser sets are used, use the cloth cutting knife with
the same size as that supplied with the machine. If a cloth cutting knife with different size is used,
the knife unit breakage or the like will be caused.
In the state of the standard delivery of J type, the presser of M set is installed
and that of S set is installed on C type.
The sewing length can be changed as shown below by installing the optional
presser set and moving the installing position of the knife unit only.
■ S and R type (long thread trimming)
Looper thread and gimp trimming is operated
at the position of the feed base origin and the
presser goes up after the trimming.
1) Looper thread and gimp have been adjusted so
that they are separated upward and downward by
thread handling plate
2) Looper thread is precisely held between looper
thread clamp fixing plate
clamp of the plate spring and gimp is precisely
held between looper thread clamp fixing plate
and gimp clamp of the plate spring.
3) Adjustment has been performed so that the top
end of counter knife
dot of moving knife
thread trimming actuating arm
When the cut end (thread waste) of looper
thread or gimp is clamped with looper
thread clamp
failure occurs. As a result, stitch skipping
at the sewing start or defective stitches will
occur. So, remove the thread waste.
■ J and C type (short thread trimming)
When the feed base is manually moved to
the rear until it will go no further, upper knife
lower cover rides on the cloth cutting
knife and remove presser unit
L o o p e r t h r e a d a n d g i m p t r i m m i n g i s
operated at the position of the feed base
origin after the presser has been lifted.
1) Looper thread and gimp have been adjusted so
that they are separated from the cloth by thread
handling plate .
2) Driving link is actuated and lower knife
upper knife engage with each other to perform
thread trimming.
3) Upper knife lower cover
of the remaining looper thread when looper thread
comes in contact with the blade of the moving knife.
.
and looper thread
is aligned with engraved
when the stroke of looper
is maximum.
or gimp clamp , clamp
.
and
controls the variation
S set : 16 to 26 mm
M set : 24 to 34 mm
L set : 32 to 42 mm
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