31
Setscrew TP
Needle plate sensor switch
Setscrew TP
Needle plate base plate
Fixed cutter spacer
Micro switch base
plate
Micro switch
Needle plate sensor knob Needle plate
11 to 11.5 mm
Bottom
side of
needle
plate
Actuator
Mechanical adjustment
Needle plate switch (method 1)
To check and adjustment:
1. Prepare the needle plate and the needle plate for
straight stitch.
2. Remove the bed cover and free arm cover.
3. 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.
4. The distance between the bottom side of the needle
plate and the micro switch base plate should be in the
range of 11 to 11.5 mm.
If not, loosen the setscrew TP and move the base
plate up or down to adjust it. Tighten the setscrew 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.
(Needle plate sensor switch)
To remove:
1. Remove the base cover, bed cover and the free-arm
cover (Refer to page 2 to 4).
2. Disconnect the needle plate sensor switch connector
from the printed circuit board A (Refer to page 7).
3. Remove the setscrew TP and the needle plate
sensor switch.
To attach:
1. Attach the needle plate sensor switch with the
setscrew TP. Tighten the setscrew 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 above).
4. Tighten the setscrew TP firmly.
5. Attach the base cover, bed cover and free-arm cover.
Slide plate positioning plate
Fig. 3
Fig. 2
Fig. 1
