(19) Adjustment of the moving knife and counter knife position
Counter knife position : The clearance between the counter knife
and the needle hole guide
is 1.0mm.
Moving knife position : Before thread trimmer operation (standby state), the distance from the throat plate
front end to the tip of the thread cutter lever (small)
is 18.5mm.
However, there shall be a proper clearance toward the moving knife tip during needle
thread clamp and feed forward.
– 33 –
(20) Floating amount of the thread tension disk
When the sewing machine power supply is turned off (AT solenoid
is OFF), the gap between AT thread
tension disk
is 0.6 ~ 1mm.
Close contact
Standard Adjustment
Standard Adjustment
4 mm or less
A
B
0.6 to 1mm
There shall be a
clearance
18.5mm
18.5mm
1.0mm