Beisler 739-23-1 Service Manual - Manual (Page 25)

2.12.5 Blade drive
Caution! Risk of injury!
Switch off main switch!
Adjust blade drive only when the sewing machine is switched off.
Instruction and inspection
If the eccentric 1 of the drive motor is at the lower dead centre,
approximately ¾ of the length of the cutting edge of the movable blade
must be below the cutting edge of the fixed blade.
Adjust blade bar 4 in such a way that there is an equal clearance at
both sides of the blade holder 3.
Adjustment
–
Unscrew face cover.
– Turn eccentric 1 to the lowest position for the blade movement at
the motor.
– Loosen screw 2.
– Adjust the height of the blade bar 4 in such a way that ¾ of the
movable blade isbelow the cutting edge of the fixed blade.
– Adjust blade bar 4 to the side in such a way that there is an equal
clearance at both sides of the blade holder 3.
– Tighten screw 2.
CAUTION!
If the blades are not overlapping as described above, the cutting
performance may not be sufficient, especially with thick material.
Excessive overlapping may result in the sewing material piling up in
front of the edge cutter.
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