Adjusting Backlash Between Hook Drive Gear And Lower Shaft Gear - ELNA eXperience 660 Service Manual

ADJUSTING BACKLASH BETWEEN HOOK
DRIVE GEAR AND LOWER SHAFT GEAR
ROTARY PLAY OF GEARS SHOULD BE 0.8 MM OR LESS WHEN THE TIP OF THE ROTARY
HOOK IS WITHIN THE WIDTH OF THE FEED DOG AS SHOWN BELOW.
TO CHECK:
1. Turn the power switch off. Remove the needle plate and bobbin holder. Remove the bed cover.
2. Turn the handwheel slowly toward you until the tip of the hook (A) is between width (B) of feed dog.
3. Rotate the hook race clockwise and counterclockwise by finger. Check the play. It should be 0.8 mm or less.
* If there is more than 0.8 mm play, adjust as follows.
ADJUSTMENT PROCEDURE:
1. Remove the bed cover and loosen the hexagonal screw (C).
2. Turn the lower shaft bushing (D) (eccentric), in the direction "E" when the play at shuttle hook tip is too small.
3. Turn the lower shaft bushing (D) (eccentric), int the direction "F" when the play at the hook tip is too large.
4. Tighten hexagonal screw (C) securely after adjustment.
Hexagonal screw (C)
Lower shaft bushing
Lower shaft gear
Groove of lower shaft bushing (D)
F E
15
MODEL:eXperience 660
(B)
Tip of the hook
Rotary play should
be 0.8 mm or less
Shuttle hook gear