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9
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ADJUSTING THE STITCH FORMATION
9-1 Position of the thread support
When the needle bar is at the bottom of its stroke,
the centers of the eyes on thread eyelet A should be
level with the top surface of thread support B, and
A should be parallel with B.
Height adjustment of thread support B is made by
loosening screw C and moving thread support B up
or down. Moving thread support B up tightens the
needle thread. Moving thread support B down
loosens the needle thread.
9-2 Position of the looper thread eyelets
Align the eyes on looper thread eyelets A with the
center of the shaft. Adjust the position of the eyes
on looper thread eyelets A by loosening screws B
according to the sewing conditions such as the
fabric and/or thread to be used.
To increase the amount of the looper thread to be
supplied, move looper thread eyelets A toward the
rear side of the machine.
To decrease the amount of the looper thread to be
supplied, move looper thread eyelets A toward the
front side of the machine.
Thread guide C should be 6~7mm above the top
surface of the guide plate.
Adjustment is made by loosening screw D.
9-3 Position of the looper thread take-up
When the point of the needle has reached bottom
surface A of the looper blade while the looper is
moving to the right from the extreme left end of its
travel, the looper thread should be removed from
point C on looper thread take-up B.
Adjustment is made by loosening and then
tightening screw D.
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