31
4) Adjustment of needle and looper timing
⑴
Left/right position of looper
The clearance between the end tip of the looper and the center of the right needle changes in accordance with needle
distance, when the needle is at its lowest, and the looper is at its far right. Be sure to adjust the distance as shown in the
table below.
Adjustment can be done by loosening the screw
①
of the looper holder.
※
In all cases, the distance from the center of the needle bar to the end tip of the looper is 6.0 mm.
Using the Looper Timing Gauge makes it easy to adjust
the left and right position of the loopers. Timing Gauge
is an optional part. If needed, you may ask for the
purchase to where the product was bought or SunStar
directly.
※
Use Timing Gauge
Timing Gauge is marked with such scales as A, B, C, D and E depending on needle distance. When the looper is in
the most right-end position and the right needle settles on the
“
V groove
”
according to needle distance, keep the
Timing Gauge and the loopers in sync, and fasten the
“
looper holding nut.
”
[ Figure 49 ]
Needle
Distance between needles
Gauge scales
Distance from the left of the needle bar to the end tip of the looper
3.2mm (32)
A
4.4 mm
4.0mm (40)
B
4.0 mm
4.8mm (48)
C
3.6 mm
5.6mm (56)
D
3.2 mm
6.4mm (64)
E
2.8 mm
[ Figure 47 ]
①
[ Figure 48 ]
6mm
