14
Singer Furtura III series
9. Basic positioning of zigzag step motor
Adjustment
1. Set the lifting cam (A) to its highest lifting position.
2. Set the step motor cogwheel (B) so its calibration wing (C) is against the calibration stop (D).
3. The circle mark (E) must at this point be in the position against the lifting cam (A).
4. Mount the Step motor into the cogwheel (B).
5. Tighten one of set the screws (F) on the Step motor cogwheel (B).
6. Connect the front cover.
7. Enter Test mode and select mode 2, needle should now be in its right position.
8. Loosen up the set screw (F) on the Step motor cogwheel (B).
9. Put a feeler gauge (0.4 mm) between the Step motor cogwheel (B) and the units casting.
10. Turn the Step motor cogwheel (B) so its calibration wing (C) is against the calibration stop (D).
11. Tighten the set screw (F) on the Step motor cogwheel (B).
12. Check so the circle mark (E) is in the position against the lifting cam (A).
13. Turn off the machine and tighten the seconded Set screw on the Step motor cogwheel (B).
14. Check the needle in centre position.
15. Check the
A
C
D
E
B
F
