Operation Manual

Operation
Operating Manual 512/532 Version 01.0 - 07/2015 27
4.6 Setting the hook thread tension
Figure 6: Setting the hook thread tension
The required hook thread tension must be generated by the
tensioning 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).
CAUTION
Risk of injury from needle and moving parts
Only set the hook thread tensioner with the sewing
machine switched off.
③
②
①
(1) – Tension spring
(2) –
Regulating screw