Clearance Between Needle And Hook (No.2) - Janome 3128 Service Manual

CLEARANCE BETWEEN NEEDLE AND HOOK (NO.2)

TO CHECK:
Use this adjustment method No.2 if the clearance cannot be adjusted with the method No.1.
The clearance between needle and shuttle hook should be -0.05 - 0.10 mm.
ADJUSTMENT PROCEDURE:
1. Set the pattern selector dial at maximum zigzag width, and turn the handwheel toward you to bring
the needle to the left needle position.
2. Open the shuttle cover and loosen the lower shaft bushing (front) setscrew "A". Then slide the
lower shaft to the right side slightly (approximately 0.5 mm) not to disengage the gears, and tighten
the setscrew temporary.
3. Loosen the setscrews "B" (2 pcs.) through the holes in the rear cover, and slightly move the shuttle
body up or down to adjust the clearance between needle and shuttle hook to -0.05 - 0.10 mm, and
tighten the setscrews "B" temporary.
4. Turn the handwheel to check the clearance between shuttle race spring and needle in left and right
positions. If the clearance is not equal, adjust it by turning the shuttle race body.
5. Tighten the shuttle race setscrews "B" (2 pcs).
6. Loosen the setscrew "A" on lower shaft bushing and slide the gear back to the original position
while adjusting the backlash.
7. Tighten the setscrew "A" firmly.
Note: The rotary play of the hook driver should be 0.3 mm or less and lower shaft turns smoothly.
After the adjustment, check the hook timing.
HOLES IN THE
REAR COVER
SHUTTLE RACE
SETSCREW "B"
(2 PCS.)
MECHANICAL ADJUSTMENT
SETSCREW "A"
LOWER SHAFT BUSHING
(FRONT)
-0.05 - 0.10 MM
CLEARANCE SHOULD BE EQUAL
13
MODEL 3128
NEEDLE
SHUTTLE RACE SPRING