– 18 –
22. Belt tension
23. Position of lower knife
[Checking items]
1
Belt
2
Motor
3
Nuts
* Sewing speed : 1,500 sti/min
* The belt
1
should slacken approx. 3 to 4 mm
A
under a 1.96 N
(200 g) load.
[How to perform adjustment]
○ Loosen the nuts
3
of the motor
2
.
○ Move the motor
2
to perform adjustment.
○ Tighten the nuts
3
.
[Checking items]
1
Throat plate
2
Lower knife presser plate
3
Setscrew
4
Lower knife support plate
5
Setscrew
6
Lower knife
* Check that the distance between the top surface of throat plate
1
and the lower knife
6
is 0 to 0.3 mm
A
.
[How to perform adjustment]
○ Loosen the setscrew
3
of the lower knife presser plate and the
setscrew
5
of the lower knife support plate.
○ Move the lower knife
6
up or down to perform adjustment.
○ Turn the lower knife support plate
4
to be brought into close
contact with the lower end of lower knife
6
. Then, tighten the
setscrew
5
.
○ Tighten the setscrew
3
.
6
5
3
2
1
A
3
2
1
A
