20
66
HOW TO REPAIR THE MACHINE
1) Adjusting the height of the needle bar
Loosen the needle bar clamp screw① at its
lowest point, adjust the upper punched mark of
the needle bar to conform to the bottom of the
needle bar bushing as shown in the Figure28,
then tighten the needle bar clamp screw①.
2) Adjusting the needle and the shuttle
B. After unfastening the shuttle drive screw①, open the inner hook pressure bar ② left to right and remove
the shuttle Race ring ③ from the (large) shuttle ④.
C. Make the shuttle hook point accord with the center of the needle. And make the needle and the front
face of the shuttle drive connect each other to prevent the needle from curving. Then, tighten the drive
screw ① firmly.
D. After unfastening the (large) shuttle screw⑤, turn the large hook adjustment shaft ⑥ to the left to right
and adjust the (large) shuttle ④ so that the needle and the shuttle hook point is 0.05~0.1mm apart
from each other.
E. After adjusting the (large) shuttle ④ in place, adjust the rotary direction of the (large) shuttle ④ so the
needle and the (large) shuttle ④ is 7.5mm apart from each other.
Then, tighten the (large) shuttle screw ①.
A. As shown in the Figure29, go up the needle
bar from its lowest point, and conform the
lower-left punched mark of the needle bar to
the lower bushing of the needle bar.
7.5mm
②
②
⑥
③
→
→
0.05~0.1mm
→
⑤
①
④
0mm
[ Fig. 28 ]
[ Fig. 29 ]
Needle Bar
Lower Bushing
Lower
punched mark
Upper
punched
mark
①
The machine is set to be the best condition at the factory. Do not make any discrete
adjustments on the machine and replace genuine parts approved by the company only.
Caution
For safety, make sure all the screws are tightened firmly after adjusting the (large) shuttle.
Caution
To Next Page
Loading...
Need help?
General
