Adjust Bobbin Thread Tension - Duerkopp Adler 510 Operating Instructions Manual

7.7 Adjust bobbin thread tension

14
Caution: Danger of injury !
Switch off main switch !
Adjust bobbin thread tension only when the automatic bartacker
is switched off.
The required bobbin thread tension is to be produced 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.
Adjust 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 bobbin case.
1
2
3