5. Stitch regulator
5.1 Limitation of maximum stitch length
Caution: Danger of injury !
Switch off main switch.
Check and adjust limitation of maximum stitch length only
when sewing machine is switched off.
Standard checking
Depending on the sewing equipment being used, the s titch length
setting must be limited to 6 mm or 9 mm.
–
Set maximum stitch length.
Turn button 4 in clockwise direction as far as it will go.
–
Sew test s eam on thin cardboard and measure stitch length.
The measured stitch length must not exceed the maximum stitch
length allowed to realize with the used sewing equipment.
Correction
–
Screw off arm cover.
–
Loosen clamping screw 2.
–
Shift clamping block 5 on threaded spindle 1.
–
Tighten clamping screw 2.
After a longer operation of the sewing machine an axial clearance can
occur in the threaded spindle 1 so that the maximum stitch length can
no longer be set. In this case the position of clamping block 6 has to be
readjusted.
–
Loosen clamping screw 3.
–
Shift clamping block 6 on threaded spindle 1.
–
Tighten clamping screw 3.
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