Operation Manual

Switch b2

After the trimming of the upper thread switch b2 operated by cam 1 determines the

timing for lowering the thread catcher.

Cam 1 is connected to the length setting slide.

With the setting of a different buttonhole length the correct switch timing is thus set

automatically.

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Just before ending the left buttonhole seam turn the handwheel until it catches. The

sewing drive turns off.

–

Turn the material support plate with the hand crank about 6 mm farther.

At this time switch b2 should be operated by cam 1.

The thread catcher lowers.

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Adjust switch b2.

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Correct the switch timing after a trial run, if necessary.

The upper thread must be caught about 2 mm behind pin 2.

2b1 b2 1