56
[ Fig. 81 ]
5) Adjusting the Spring on the Upper Side of the Shuttle
A. Adjusting the spring on the upper side of the shuttle.
After removing the lower feed plate and the needle plate
from the machine, unfasten the upper side spring screw.
Place the spring on the upper side of the shuttle so that
the center of the needle meets point vertically, and is
1mm apart from point horizontally. Then tighten the
screw.
B. How to set the upper thread loop control plate in place
Unfasten the upper thread loop control plate screw ①,
then place the upper thread loop control plate so that the
end of the upper thread loop control guide is 2mm
apart from the center of the needle. Then, tighten the
upper thread loop control plate screw.
[ Fig. 80 ]
[ Caution ]
If the surface around the spring is rough or scratched,
the thread may be disconnected or the thread strand
may be unfastened. Always check the surface before
operating the machine.
1mm
①
①
①
Upper
Thread
Loop
Adjusting
Plate
Upper Thread
Loop Adjusting
Guide
①
→
→
2mm
6) Adjusting the Moving Knife and the Fixed Knife
A. Use the trimming lever control screw to adjust the space between the thread removing point of the moving knife and
the needle plate hole as indicated in the table with the needle bar stopped at the upper position.
B. Use the fixed knife screw to adjust space B between the fixed knifes and the needle plate cover as indicated in the
table.
C. Check the position of the knife by trimming manually after the adjustment.
[ Fig. 82 ]
G
H
4.5mm
5.3mm
1~1.2mm
1~1.2mm
AB
Needle Plate
Cover
Fixed knife
→
→
↔
B
A
Moving Knife
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