Operation Manual

2.5 Stitch regulator (equal stitch length for forward and reverse stitching)

Caution: Danger of injury!

Turn off the main switch.

Check and set the stitch uniformity of forward and reverse stitching

only when the sewing machine is switched off.

Rule and control

The stitch length for forward and reverse sewing must be equal.

Use the special wrench (order no. 0981 160402) from the gauge set to

perform the setting.

–

Turn the butterfly nut 3 against the stop.

–

Set the stitch regulator lever 4 and the knob 6 to a forward stitch

length of 3 mm.

–

Tighten the butterfly nut 3.

–

Place a sheet of paper under the material presser foot.

–

Lower the lifting lever.

–

Sew 11 forward stitches by turning the handwheel in its direction of

rotation.

–

Raise the stitch regulator lever 4 up to the stop (position “R”) for

sewing in reverse and hold it.

–

Sew 11 reverse stitches (alongside the forward stitches) by turning

the handwheel in its direction of rotation.

–

Check whether the stitches (forward and reverse) have the same

length (see fig. B)

Adjustment

–

Loosen the threaded pin 2.

The threaded pin is located inside the cast iron and is accessible

from the top after the arm cover is removed.

–

Turn cam 5 with the special wrench.

The cam is also located inside the cast iron.

–

Tighten the threaded pin 2 again.

Maximum stitch length limitation

–

Reset anew the stitch length limiter 1 accordingly.

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