JUKI MEB-3200 Engineer's Manual page 55

Adjustment Procedures
When the amount of remaining thread is desired to be further
shorter, loosen screws 1, and slide screws 1 in the direction of
arrow mark A.
(Cautuion)
1. In case of the sewing machine provided with "needle
thread drawing double motion function", set the set
value of compensation of needle thread tension (data
No. 53) at the time of thread trimming to "0" and use the
sewing machine. When the value is set to a higher one,
there is a case where the length of remaining needle
thread may be unstable.
2. In case of the sewing machine not provided with "needle
thread drawing double motion function", increase the
set value of compensation of needle thread tension (data
No. 53) to shorten the length of remaining needle thread.
3. In case of the sewing machine not provided with "needle
thread drawing double motion function", adjust the
length of remaining needle thread to a longer one for
allowance even when the needle bar thread tension disk
is removed and the needle thread clamp asm. is installed
close to the needle bar. In case of the sewing machine
not provided with "needle thread drawing double motion
function", the length of remaining needle thread is
shortened by increasing the set value of compensation
of needle thread tension (data No. 53) at the time of
thread trimming and there is a case where the length of
remaining needle thread may be unstable.
4. The needle thread drawing double motion function can
be adapted from ROM011D.
Adjustment Procedures
1. Adjusting the feeding amount of the needle thread during
sewing
1) Loosen screw 2 and move the position of needle thread
hauling thread guide 1 up and down to adjust the feeding
amount.
2. Adjusting the feeding amount of the needle thread at the sewing
start
1) Loosen screw 3 and move screw 3 in the direction of A
b a B to adjust the amount.
2) When the machine is with needle thread clamp device, if
the arm moves in direction A, the length of the needle thread
remaining on the needle becomes shorter and rolling can
be performed with ease.
Results of Improper Adjustment
™ When the drawing amount of
needle thread is excessively
small :
1. Thread may slip off needle.
2. Thread knotting failure at the
3. Needle breakage may occur.
Results of Improper Adjustment
™ If the thread guide slides
downward, the feeding amount of
the needle thread is decreased
and the needle thread is easily
tightened.
™ If the thread guide slides upward,
the feeding amount of the needle
thread is increased and the
needle thread is hard to be
tightened.
™ If the arm moves in direction B,
the hauling amount of the needle
thread is increased and slip-off of
n e e d l e t h r e a d o r n e e d l e
breakage can be prevented.
51
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start of sewing may occur.