6
5555----2 Looper left
2 Looper left
2 Looper left
2 Looper left----to
to
to
to----right movement
right movement
right movement
right movement
The point of the looper should be approximately 1.2~1.5mm above the top of the left
needle’s eye when the looper moves to the left on the back side of the needles.
The point of the looper should be approximately 0.8~1.1mm above the top of the left
needle’s eye when the looper moves to the right on the front side of the needles (see the
illustration below). To adjust the timing of the looper to the needles, remove the
machine cover, loosen screws A on the timing pulley (upper), and shift the timing pulley
(upper) by turning the handwheel while holding the timing pulley (upper) by hand.
5555----3 Looper setting distance
3 Looper setting distance
3 Looper setting distance
3 Looper setting distance
Adjustment should be made by referring to looper A.
When the needle is at the bottom of its stroke with
the looper at the extreme right end of its travel,
setting distance B from the point of the looper to the
center of the right needle varies according to the
needle space (see the table below).
Adjustment is made by loosening screw C on the
looper holder.
■
If the needle space is different, the distance from the
point of the looper to the center of the right needle
should be 6.5mm on cover stitch machines.
On double chainstitch machines it should be 4.5mm.
Needle
space
Looper setting distance
Center of the right needle
(B)
4.8-10-10-10 4.1mm
02-3U
5.0-13-13-13
4mm
8.5-8.5-8.5 4.5mm
9.5-9.5-9.5 4.5mm
00-4U
6.4-6.4-6.4 4.5mm
