Operation Manual

6.6.2.2 Testing the bobbin thread monitor

This program serves for testing the reflected light barriers of the

bobbin threads.

full empty

Test with full bobbin

–

Insert a full bobbin.

–

Cover the bobbin thread monitor against extraneous light.

–

Pull the bobbin thread.

–

A value between “0–4”should be indicated in the bar graph.

Test with empty bobbin

–

Insert an empty bobbin.

–

Cover the bobbin thread monitor against extraneous light.

–

Turn the empty bobbin until the surface is in parallel position to the

bobbin thread monitor.

–

A value between 9–15” should be indicated in the bar graph.

–

Tap the function key ESC to quit the test program.