3.7.5 Hook-shaped knife
Rule and control
The hook-shaped knife 2, seen in the arrow direction, must rest
against the two screws 1.
In neutral position of the hook-shaped knife, its tip 6 and the cutting
edge 7 must be flush with the stationary knife 5.
During the movement of the knife, the tip 6 of the hook-shaped knife
must stand, coincident, in the adjusting sheet 4 under the tip of the
triangle 3.
Caution: Danger of bodily injuries !
Turn off main switch.
Switch off the machine before correcting the hook-shaped knife.
Correction
–
Swing the hook-shaped knife 2 forwards by had.
–
Loosen the fastening screws 1 of the hook-shaped knife.
–
Push the hook-shaped knife in arrow direction against the
fastening screws 1.
–
Tighten the fastening screws 1.
–
Loosen the screw 8.
–
Set the neutral position of the hook-shaped knife 2.
In neutral position of the hook-shaped knife, its tip 6 and the
cutting edge 7of the stationary knife must be flush.
–
Tighten the screw 8.
–
Actuate the hook-shaped knife 2 by hand.
Check whether the tip 6 of the hook-shaped knife coincides with
the tip of the triangle 3.
–
For correcting, loosen the screws 1 and shift the hook-shaped
knife 2 in axial direction.
Adjustment:
If the adjustment of the hook-shaped knife 2 is correct, the tip 6 will
move along the line 9 during the sewing process.
The dot-and-dash line 9 extends approximately between the middle of
the needle an the tip of the hook.
1
2 3 4
5 6 7
0,1 mm
9
5 1 2
8
58
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