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Needle thread guard
Needle thread guard D adjusts the needle thread
tension after the looper has withdrawn from the needle
thread loop and the shape of the needle thread loop
which the looper enters. When the needle bar is at the
bottom of its stroke, needle thread guard D should be
1.5mm above the top end of needle bar lever eyelet E.
Moving needle thread guard D upwards increases the
size of the needle thread loop.
Moving needle thread guard D downwards decreases
the size of the needle thread loop.
Adjustment is made by loosening screws F.
11-2 Looper thread tension
The illustration of the looper thread take-up cam is as
seen from the front (operator's side).
When the looper starts moving to the left from the
extreme right end of its travel, looper thread take-up
cam G should begin to cast off the looper thread.
Adjustment is made by loosening screws H.
To increase the amount of looper thread to be supplied,
advance the timing at which the looper thread take-up
cam starts casting off the looper thread for the looper.
When adjusting looper thread take-up cam G, be
careful not to move it front or back.
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12
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CLEANING THE MACHINE
At the end of each day, remove the presser
foot and the needle plate and then clean the
slots of the needle plate and the area
around the feed dogs.
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