Setting The Hook Thread Tension - Duerkopp Adler 512/532 Operating Manual

4.6
Fig. 6: Setting the hook thread tension
(1) - Tension spring
(2) - Adjusting screw
The necessary hook thread tension should be generated by the thread
tension spring (1). The upper part of the bobbin case (3) slowly drops
thanks to its own deadweight if held by the threaded hook thread.
Setting the tension spring
1. Remove the upper part of the bobbin case (3) with the bobbin.
2. Set the tension spring (1) by turning the adjustment screw (2) until the
3. Insert the upper part of the bobbin case.
18

Setting the hook thread tension

CAUTION
Risk of injury due to the needle tip and moving
parts
The hook thread tension may only be adjusted with
the sewing unit switched off.
needed tension value is reached.
Operating manual
1
2
3
(3) - Upper part of bobbin case.
Operating manual 512/532 Version 01.0 - 03/2013