Needle Plate Switch - ELNA eXcellence 780 Service Manual

Needle plate switch

Fig. 1
Needle plate sensor
Setscrews TP
Fig. 2
Needle plate base plate
Fixed cutter spacer
Fig. 3
11 – 11.5 mm
Needle plate sensor knob
Bottom
side of
needle
plate
Setscrews TP
Mechanical Adjustment
Slide plate positioning plate
Needle plate
Actuator
Micro switch
Micro switch base
plate
To check and adjustment:
1. Prepare the needle plate and the needle plate for
straight stitch.
2. Insert the needle plate base plate under the fixed
cutter spacer and the slide plate positioning plate.
Press the ◎ mark to attach the needle plate.
3. The distance between the bottom side of the needle
plate and the micro switch base plate should be in the
range of 11 – 11.5 mm.
If not, loosen the setscrews TP and move the base
plate up or down to adjust it. Tighten the setscrews TP
firmly after the adjustment.
The actuator of the micro switch should be alighed
with the needle plate sensor knob as shown in fig 3.
To remove:
1. Remove the base cover, bed cover and the free-arm
cover (see page 3 to 5).
2. Disconnect the connector from the needle plate switch
from the printed circuit board A (see page 10-11).
3. Remove the setscrews TP and the needle plate sensor
switch.
To attach:
1. Attach the needle plate sensor switch with the
setscrews TP. Tighten the setscrews TP lightly.
2. Connect the needle plate sensor switch connector to
the printed circuit board A.
3. Check the needle plate sensor and adjust as
necessary (see the adjustment procedure below).
4. Tighten the setscrews TP firmly.
5. Attach the base cover, bed cover and free-arm cover.
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