51
Setscrews TP
Needle plate sensor
Setscrews TP
Needle plate base plate
Fixed cutter spacer
Micro switch base
plate
Micro switch
Needle plate sensor knob
Needle plate
11 – 11.5 mm
Bottom
side of
needle
plate
Actuator
Mechanical adjustment
Needle plate sensor
To remove:
1. Remove the base cover, bed cover and the free-arm
cover (see page 2 to 4).
2. Disconnect the connector from the needle plate sensor
switch from the printed circuit board U2 (see page 10).
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 U2.
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.
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 aligned with the
needle plate sensor knob as shown in fig 3.
Slide plate positioning plate
Fig. 3
Fig. 2
Fig. 1
