Adjusting The Bobbin Thread Tension - Duerkopp Adler 910 Operating Instructions Manual

7.6

Adjusting the bobbin thread tension

14
Caution: Risk of injury !
Switch the main switch off.
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
–
Take off the top of bobbin case 3 with the bobbin.
–
Adjust the tension spring 1 at the regulating screw 2 until the
required tension value is reached.
–
Reinsert the top of the bobbin case.
1
2
3