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Service Manual
17. Origin point positioning of zigzag bight
(A)
Checking meshing position of gears
This procedure is needed only when disassembling and re-assembling cams.
Checking
1. Remove face cover and turn off power switch.
2. Rotate gear (a) clockwise until it stops with long projection (d) touched with shaft.
3. Check to see if end (c) of zigzag cam (b) aligns with center of gear (a).
d
Disassembling and re-assembling
If meshing position of two gears is not correct, remove zigzag cam (b) from shaft and insert it
into correct position.
(B) Origin point positioning of zigzag bight
1. Loosen two screws of motor's pinion gear (a) with interlocked together. Set test mode 4.
Test mode 4 is to check if step motor works appropriately at zigzag stitching.
*See next page.
2. You see motor shaft spin around by pushing reverse switch in test mode 4, and it is in
exciting position while spinning around by pushing reverse switch several times.
Rotate movable pinion gear (a) clockwise until its projection(d) reaches stopper, and
tighten available screw securely.
b
Original issue
Oct.2012
Page 31/41
Model
One Plus
a
c
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