3.7.3 Regrinding the stationary knife
Rule and control
The cutting angle of the stationary knife 5 amounts to 15° (see the
sketch).
For regrinding it is absolutely necessary to use a fine grain stone.
Caution: Danger of bodily injuries !
Turn off main switch.
Switch off the sewing machine before fitting the reground knife.
ATTENTION !
Reground knives, that have lost more than 0.5 mm of their original
length, must be replaced by a new knife.
Correction
–
Loosen the screw 2.
The pre-tension of the stationary knife 6 will be reduced.
–
Remove the knife 5.
–
Regrind the knife.
The cutting angle of the stationary knife amounts to 15°.
–
Install the knife.
–
Adjust the knife so that the distance between the cutting edge 3
and the edge 4 of the throat plate cut-out amounts to 38 mm.
ATTENTION !
When installing a reground knife ensure that it does not touch
the screw 1.
–
Tighten the screw.
–
Readjust the neutral position of the hook-shaped knife (see
chapter 3.7.5) and the cutting pressure (see chapter 3.7.6).
1
2
3
4
5
15°
56
To Next Page
Loading...
