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When the feed dog does not return to “UP” position
Projection of feed lifting cam
1. Function of the drop feed lever
1) Remove the base.
2) Bring the needle bar at the lowest position.
(The projection of the feed lifting cam is visible at
this position.)
3) When the drop feed lever is moved left and right,
the feed lifting cam should move accordingly.
2. Position of the setscrew on the lower shaft ring
Check if the setscrew A on the lower shaft ring is in
line with the projection of the feed lifting cam.
The setscrew B should be at the position as shown.
3. Clearance between the feed lifting cam and coil
spring.
When the feed lifting cam is pushed to the left, the
coil spring should covered with the feed lifting cam
completely.
If the feed lifting cam does not move smoothly,
adjust as follows:
1. Loosen the setscrews A and B.
2. Bring the needle bar at the lowest position and turn
the lower shaft ring slightly to twist the coil spring
lightly. Set the setscrew A in line with the projection on
the feed lifting cam and tighten it.
3. Tighten the setscrew B
4. Check following the steps 1-3 above.
5. Make sure that the lower shaft does not have a play.
Attach the base.
Projection of feed lifting cam
Projection of feed
lifting cam
Setscrew A
Setscrew B
Feed lifting cam spring
Setscrew A
Setscrew A
Setscrew B
Setscrew B
Projection of feed
lifting cam
Range of turning the
lower shaft ring
