4
3333----6 Changing the loo
6 Changing the loo
6 Changing the loo
6 Changing the looper orbit
per orbit
per orbit
per orbit
When the looper moves around the needles, the
point of the looper barely touches the needle.
■
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.
■
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.
