Operating instructions

7.7 Adjusting the bobbin thread tension

Caution – Risk of Injury !

Turnthemainswitchoff.

Adjust the bobbin thread tension only when the automatic bartacker is

switched off.

The required bobbin thread tension should be generated by 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.

Setting the tension spring

–

Take off top of bobbin case 3 with the bobbin.

–

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

tension value is reached.

–

Reinsert top of the bobbin case.