Setting The Hook Thread Tension - DURKOPP ADLER 650-16 Operating Instructions Manual

Operation
Operating Instructions 650-16 - 02.0 - 08/2016
4.7.2

Setting the hook thread tension

CAUTION
Risk of injury from sharp and moving parts!
Cutting or crushing possible.
Switch off the machine before setting the hook
thread tension.
Fig. 10: Setting the hook thread tension (1)
Proper setting
The hook thread tension must be set so that the resulting stitch
pattern looks like the figure in ( p. 27).
At the recommended hook thread tension of e.g. 25 g (measured
with a full bobbin), 12.5 g should be generated by the braking
spring and 12.5 g by the tensioning spring.
The basic setting for the tensioning spring is performed as follows:
• When the bobbin housing contains a full bobbin it must
sink slowly under its own weight.
The braking spring prevents the bobbin running on when the
thread has been cut.
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