Operation Manual

Switch b3

After the sewing in of the upper thread end in the right buttonhole seam switch b3

determines the timing of the raising of the thread catcher.

The upper thread end should be held as long as possible.

Thereby the switching roller 2 must have fallen from the switching piece 3 before the

clamping piece 4 of the thread catcher can run onto the clamp shackle 5.

This corresponds to a machine position shortly before entering in the buttonhole eye.

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Loosen screws 1.

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Set switch b3.

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Tighten screws 1 again.

1b3 2 3 45