Beisler 739-23-1 Service Manual - Manual (Page 22)

2.12.2 Adjustment of cutting pressure
Caution! Risk of injury!
Switch off main switch!
Adjust cutting pressure only when the sewing machine is switched off.
Instruction and inspection
The devices must be adjusted in such a manner that proper cuts are
achieved at minimum pressure. Low cutting pressures keep wear to a
minimum.
The system must be adjusted to cut two of the thickest threads.
Adjustment
–
Loosen counter nuts 2 and 3.
– Reset cutting pressure screws.
– Tighten cutting pressure screws until the movable blade fits
closely.
– Turn blade drive manually and check for smooth running.
– Carry out test cut.
Insert sewing piece into opened blades and rotate the sewing drive
manually once.
A proper cut must be made in the sewing piece according to the
length over which the blades are overlapping.
– Tighten counternuts 2 and 3.
CAUTION!
Excessive cutting pressure leads to stiffness of the cutting device and
to wear of the blades.
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