Operation Manual

7.6 Adjusting the bobbin thread tension

Caution: Risk of injury !

Switchthemainswitchoff.

Adjust the bobbin thread tension only with the sewing unit switched off.

The required bobbin thread tension is to be produced by the tension

spring 1. The top of bobbin case 3 should drop slowly due to its own

weight when being held at the threaded-in bobbin thread.

Adjusting the tension spring

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Take off the top of bobbin case 3 with the bobbin.

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Adjust the tension spring 1 at the regulating screw 2 until the

required tension value is reached.

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Reinsert the top of the bobbin case.