Clearance Between Needle And Hook (Adjustment Method No.2) - Baby Lock BL9 Service Manual And Parts List

CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD NO.2)

To check:
Use this adjustment method NO. 2 when method NO.1 cannot be used.
The clearance between the needle and shuttle race should be –0.05 to +0.10 mm.
Adjustment procedure:
1. Set the pattern selector dial at "
2. Remove the rear cover (See page 7).
3. Loosen the screw (A) on the lower shaft bushing and slide the gear about 0.5 mm to the
right to create some slack between the gears.
4. Lower the needle and loosen the two shuttle race screws (B).
Move the shuttle race unit axially either forward or backward to adjust the clearance
between the needle and the shuttle race in the range of –0.05 to +0.10 mm.
5. Set the pattern select dial at "
the needle and inner edges of the shuttle race spring at the left and right needle drops are
equal.
If not, adjust by turning the shuttle race unit.
6. Tighten the two shuttle race screws (B).
7. Loosen the set screw on the lower shaft bushing and slide the gear back to the original
position while adjusting the backlash.
8. Tighten screw (A) firmly.
9. Attach the rear cover.
NOTE: The backlash play should be less than 0.3 mm and the lower shaft should turn
smoothly.
After the adjustment, check the hook timing.
Shuttle race
screws (B) (2 )
MECHANICAL ADJUSTMENT
", turn the handwheel to check if the clearance between
".
Lower shaft
bushing (front)
–0.05 to
+0.10 mm
Screw
(A)
14
Clearance should be equal
Needle
Shuttle race spring
MODEL BL9