Motor Belt; Needle Threader - ELNA E9020 Service Manual

(22) Motor belt

Put the motor timing belt on the motor shaft pulley of the
sewing machine motor (asm.). Then adjust the belt
tension by moving the motor up or down and after the
adjustment, fix the belt with screws 1.

(23) Needle threader

Check the needle thread using a #14 needle.
- Confirmation -
1) Clearance provided between the top end of the needle eyelet
and the hook is 0 to 0.05 mm.
Loosen screw 1 using a 2 mm hexagon wrench key, and
change the position at which needle threading lever stops.
2) The hook should protrude 1 to 1.5 mm from the front face of
the #14 needle.
3) When using a #11 needle, the needle threading guide (left)
should come in contact with the side face of the needle when
the needle threading lever is pressed down to the lowest
position of its stroke to make the needle threading hook rotate.
If the needle threader is installed to be excessively deflected
when using a #11 needle, it will deflect more when using a #16
needle. This prevents the hook from automatically returning to
its home position at the time of needle threading.
* Thehook can enter the needle eyelet as long as a needle of
which count is #11 through #16.
4) The needle threading lever should slide smoothly without being
pushed against the related components. Also, it should not
come in contact with the needle clamp, etc. when it returns to
its home position.
How to adjust
0.98 N (100g)
3 to 4 mm
How to adjust
0 to 0.05 mm
1 to 1.5 mm
Disassembly
A to F on pages 15 and 16
Location of components to be adjusted
Disassembly
Location of components to be adjusted
Adjustment drawing
1
Adjustment drawing
1
2 mm hexagon
wrench key
28