ELNA eXplore 320, Руководство по обслуживанию

Страница: 14 / 21

12
Adjusting Backlash between Hook Drive Gear
and Lower Shaft Gear
The rotary play should be 0.8 mm or less when the hook point is within the span of the feed
dog, and the
gears should turn smoothly.
<TO ADJUST>
1 Remove the base cover (see page 2).
2 Loosen the setscrews.
3 If the play is too big, turn the lower shaft bushing in the direction (B).
If the gear engagement is too tight, turn the lower shaft bushing in the direction (A).
4 Tighten the setscrews and attach the base cover.
NOTE:
Be sure to check and adjust the needle to hook timing and feed dog height if necessary, after
performing this adjustment.
A B
A
B
Span of feed dog
Hook point
Check rotary play.
Lower shaft bushing
Hook drive gear
Lower shaft bushing
Lower shaft gear