8
5555----6 Changing the looper orbit
6 Changing the looper orbit
6 Changing the looper orbit
6 Changing the looper orbit
When the looper moves around the needles, the
point of the looper on 2-needle and 3-needle
machines barely touches the right needle and the
clearance between the point of the looper and the
left needle is approximately 0.2~0.3mm.
■
The timing mark is at point E : standard
■
When the timing mark is at point C, The clearance
between the point of the looper and the left needle
when the looper moves to the left decreases.
The clearance when the looper moves to the right
increases. Then the point of the looper touches the
right needle. Skip stitching may occur when the
looper moves to the right.
A thread chain is not produced smoothly.
■
When the timing mark is at point D, The clearance
between the point of the looper and the left needle
increases. Skip stitching may occur when the
looper moves to the left. The needle extremely
touches the back of the looper, causing needle
breakage.
< Note >
To sew under good conditions, after changing the amount of the looper front-to-back
movement adjust the looper orbit by moving the timing mark slightly to C or D.
To change the looper's orbit, loosen screw B on eccentric A and shift the timing mark by
moving eccentric A front or back. The timing mark is factory-set for standard.
Do not change the orbit extremely.
