Beisler 739-23-1 Service Manual - Manual (Page 30)

2.14 Synchronizer
Instruction and inspection
After the thread is cut, the sewing machine should come to a halt in
position C of the adjusting disc.
The distance between the synchronizer 3 and the switching curve 4
must be approx. 0.5 mm to 1.0 mm.
Caution! Risk of injury!
Switch off main switch!
Adjust synchronizer only when the sewing machine is switched off.
Adjustment of settings
– Loosen counternut 2.
– Adjust distance between synchronizer 3 and the greatest outside
diameter of the switching curve.
Distance = 0.5 to 1.0 mm
– Tighten counternut 2.
– Lock sewing machine in position C of the adjusting disc.
– Loosen screws 1 and 6.
– Twist switching curve 5, so that the switching cam 4 is exactly in
line with the synchronizer 3.
– Tighten screws 1 and 6.
– Remove lock.
– Check position after cutting.
3-30
6 5 4 3 2 1