5-2 Looper left-to-right movement
The point of the looper should pass the center of the
left needle and 0.5~1mm above the top of its needle's
eye when the looper moves to the left or right on the
front or back side of the needles (see the illustration
below). Refer to 5-4 for the height of the needle.
To adjust the timing of the looper to the needles,
1.
Remove the machine cover.
2.
Loosen screws A on the timing pulley (upper).
3.
Shift the timing pulley (upper) by turning the
handwheel while holding the timing pulley
(upper) by hand.
5-3 Looper setting distance
Set the looper so that the distance from the point of
the looper to the center of the needle bar is 6mm
when the looper is at its farthest position to the
right. The table below shows setting distance A
from the point of the looper to the center of the right
needle when the needle is at the bottom of its stroke
and the looper is at its farthest position to the right.
Setting distance A varies according to the needle
space. To make this adjustment, loosen screw C
(see 5-1) on the looper holder.
NEEDLE SPACE
(INCH)
LOOPER SETTING
DISTANCE A
4.8mm (3/16)
3.6mm
5.6mm (7/32)
3.2mm
6.4mm (1/4)
2.8mm
6
B
B
L
L
X
X
s
s
e
e
r
r
i
i
e
e
s
s
