−
21
−
(1)
(2)
(4)
(3)
1 mm
(1)
3-16 Adjusting the position of the touch-back switch
The height of the touch-back switch can be changed by turning push button (1). When you desire to further
change the position, loosen setscrew (2) to slide it up or down, or loosen setscrew (3) to move it up or down
together with switch base (4).
In addition, tightening torque of setscrew (2) should be moderate since the screw is tightened in the plastic base.
And, securely and strongly tighten setscrew (3).
3-17 Adjusting the position of the handwheel
When removing the handwheel, be sure to check the following matters for adjustment.
1) Provide a clearance of 1 mm between handwheel
(1) and the pulley cover. If the clearance is too narrow,
the position detector solenoid comes in contact with
the synchronizer. If it is too wide, defective detection
may occur.
2) Be sure to adjust screw No. 1 in the handwheel to
the flat section of the motor shaft, and tighten the
screws in the order of No. 1 and No. 2.
3-18 Adjusting the automatic presser lifter (AK118)
1) Remove the side plate of the sewing machine head
and remove hinge screw (2) of knee lifter side rod (1).
(2)
