Adjusting Backlash Between Hook Drive Gear And Lower Shaft Gear - ELNA eXperience 620 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. Sway the hook race with fingers. 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 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)
A
B
15
MODEL: eXperience 620
(B)
Tip of the hook
Rotary play should
be 0.8 mm or less
Shuttle hook gear