22
23
A
0.5-1.0mm
1mm-1.5mm
3mm
7.5mm
5mm
B
A
11
①
0.6mm
②
①
②
②
①
②
①
5.Installing the trimming cam (Fig. 22)
(1)Align the second mark A on the machine pulley
with the Positioning Mark on the arm;
(2)Set the solenoid active and turn the trimming cam
① until the cam is touched with the roller, then
fix the cam;
(3)Set the solenoid inactive and make the cam lever
② restore to the original position, there should
be a 0.5-1.0mm clearance between cam and roller.
Positioning Mark
6.Adjusting the knives (Fig. 23)
(1)The relation between fixed knife and movable knife
The clearance between movable knife ① and needle
center is 7.5mm, and the clearance between fixed knife
② and needle center is 5mm.
(2)Adjusting the knife
Set the solenoid active, the movable knife ① will turn
rightward driven by the trimming cam. When the movable
knife ① moves to its left furthest position, the clearance
between two knives ① and ② should be 1.0-1.5mm
(3)Adjusting the trimming solenoid
A.If the thread trimming not smoothly, especially the
thick thread used, just need to increase the trimming
pressure;
B.Adjusting the trimming pressure: loosen the nut B,
adjust the screw A to get the reasonable pressure.
Driven crank
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