3.7.6 Cutting pressure
Rule and control
The thread cutting pressure must be as low as possible. A low cutting
pressure will reduce the wear !
Two of the thickest threads used must be cut safely at the same time
.
Caution: Danger of bodily injuries !
Turn off main switch.
Switch off the sewing machine before correcting the cutting pressure.
Correction
–
Turn back the cutting pressure screws 1 and 2.
–
Move the hook-shaped knife 4 under the stationary knife 2.
The blade 6 of the hook shaped knife must stand under the blade 5
of the stationary knife 3.
–
Set the stationary knife 3 against the hook-shaped knife 4 by
tightening the cutting pressure screws 1 and 2.
–
Place the thread to be cut alternately to the right and to the left.
Regulate the respective cutting pressure screw.
–
If the installed spring does no longer return the cutting mechanism
into its initial position, the cutting pressure is too high.
Regrind the stationary knife 3 (see chapter 3.7.3) or replace it.
5
6
1 2 3 4
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