Position Of The Looper; Adjusting The Knife Disengagement - ELNA E9020 Service Manual

(11) Position of the looper

Pressing 4 in the direction of arrow, turn the hook
driving shaft pulley by hand to actuate the moving
knife. Loosen 1 and adjust 2 so that the clearance
provided between the looper and the moving knife
base should be 0 ± 0.2 mm when the moving knife
returns, and the end of the left slot of moving knife
base aligns with the corner section of looper as shown
in the illustration below.
<Confirm the looper operation.>
When the looper operation is wrong, loosen screw
3 and adjust so that the looper is located to the
smooth operating position.
* When 3 is loosened, re-confirm the clearance
provided between the moving knife and the looper.

(12) Adjusting the knife disengagement

Set the sewing machine to its highest dead point. In this state, loosen screw 3 and adjust so that the play provided between 1 and 2 should
be 0.5 to 1 mm. (Required value is 0.5.)
How to adjust
3
4
How to adjust
Disassembly
Throat plate
Location of components to be adjusted
23
Adjustment drawing
1
2
0 ± 0.2 mm
To align
Disassembly
Throat plate and free arm bottom cover
Location of components to be adjusted