Page 12/41
Original issue
Oct.2012
Service Manual
One Plus
Model
4. Needle bar height
Note: Make this checking before checking “Needle timing to shuttle” and
”Feed-dog timing (vertical motion)”. Use needle Singer 90/14.
Checking:
1. Select straight stitch at center needle position.
2. Remove presser foot and needle plate, and then remove bobbin case.
3. Replace needle with special needle gauge (L=28.5 mm).
4. Lower the needle gauge to its lowest position by turning hand wheel by hand.
Check to see if the bottom of the needle gauge aligns with shuttle race pushing
the needle lightly as shown by arrow mark.
Adjustment:
1. Remove face cover.
2. Loosen screw (A) of needle bar clamp using hex screw driver
and adjust the height of needle bar.
Highest position of
Needle
Needle position
at center
A
Needle gauge L = 29 mm
Shuttle race
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