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11112222----3 Adjusting the needle thread
3 Adjusting the needle thread
3 Adjusting the needle thread
3 Adjusting the needle thread guard
guard
guard
guard
With the needle bar at the bottom of its stroke, the top
surface of needle thread guard A should be level and
parallel with the centers of the eyes on needle bar
eyelet B.
11112222----4 Position and timing of the looper thread eyelet
4 Position and timing of the looper thread eyelet
4 Position and timing of the looper thread eyelet
4 Position and timing of the looper thread eyelet
When the point of the needle has reached the
underside of the looper blade while the needle bar is
descending, the looper thread eyelet bar should ascend.
With the looper thread eyelet bar at the bottom of its
stroke, adjust distance A between the eye on the looper
thread eyelet and the looper thread eyelet bar by
referring to the table below.
Thread type
Distance A
Polyester (Tetoron)
8mm
Spun 10mm
Wooly 15mm
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PSM MECHANISM
13
13
13
13----1 Types of cams
1 Types of cams
1 Types of cams
1 Types of cams
There are 9 types of cams from No.1 to No.9 (9 types of standard patterns).
Various kinds of decorative stitches can be produced by a combination of 2 cams.
The inside cam moves the upper spreader.
The outside cam moves the lower two spreaders and crosses spreader threads.
< Note >
Raising needle thread guard A increases the size of the
needle thread loop. Lowering needle thread guard A
decreases the size of the needle thread loop.
