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Operation
Operating Instructions 512/532 - 04.0 - 08/2016
4.6
Setting the hook thread tension
CAUTION
Risk of injury due to sharp and moving parts!
Cutting or crushing are possible.
Only set the hook thread tensioner with the
sewing machine switched off.
Fig. 6: Setting the hook thread tension
①
②
③
(1) - Tension spring
(2) - Regulating screw
The required hook thread tension must be generated by the ten-
sioning spring (1). The bobbin housing upper section (3) should
slowly fall under its own weight when held by the threaded hook
thread.
Adjusting the tensioning spring
1.
Remove the bobbin housing upper section (3) with the bobbin.
2.
Adjust the tensioning spring (1) via the adjustment screw (2)
until the correct tension is set.
3.
Insert the bobbin housing upper section (3).
(3) - Bobbin housing upper section
27
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