Basic Positioning Of Zigzag Step Motor - Singer Futura XL-550 Service Manual

10. Basic positioning of zigzag step motor

Adjustment
1. Turn off the main power and remove face cover and needle bar unit
2. Loosen two screws (1&2) fi xing pinion gear by rotating pinion gear (A).
Position of screw (1) and screw (2) will be located as shown in fi g. 1&2 below.
3. Rotate pinion gear (A) to shift needle position. After needle position is shifted to center, temporally fi x
the screw (1).
4. Turn on the main power and pinion gear will move so that screw (1) may be located upward and then
loosen screw (1). After above steps, the motor shaft will be excited so the shaft will not move and pinion
gear can be rotatable. Rotate pinion gear (A) again until it hits with stopper (B) then tighten screw (2) by
inserting tool from lower as shown on picture below. At this time, shift needle bar to right end so the pi-
nion gear will hit with stopper.
B
A
1
2
2
Singer Furura XL-550 15