−
23
−
0.5 mm
0.2 mm
1
A
B
C
2
A
Standard Adjustment
6) Position of the moving and counter knives
Position of the counter knife :
Clearance between the counter knife and the needle hole guide is 0.5 mm.
Position of the moving knife :
Distance from the front end of the throat plate to the top end of the thread trimmer lever (small) is 18.5
mm before thread trimming action.
7)
Height of the moving and counter knives
Moving knife :
Engagement amount of the needle hole guide with the blade section of the moving knife is 0.15 mm.
Counter knife :
Level difference between the needle hole guide and the blade section of the counter knife is 0.1 mm
to 0.15 mm.
8)
Inclination of the blade point of the counter knife
In order to cut two threads (needle thread and bobbin thread) in uniformity, the blade face of the
counter knife is slanting by 0.2 mm.
Thread trimmer lever (small)
Moving knife link
Counter knife
Needle hole guide
Moving knife
0.5 mm
18.5 mm
Counter knife
Needle hole
guide
Moving knife
Throat plate
0.1 to 0.15 mm
0.15 mm
Counter knife
