Operation Manual

Operation of the sewing automat
Instruction manual 550-532 - 00.0 - 07/201530
5.7 Setting hook thread tension
Fig. 7: Setting hook thread tension
The required hook thread tension must be generated by the ten-
sioning spring (1). The bobbin housing (3) should slowly fall under
its own weight when held by the threaded hook thread.
Adjusting the tensioning spring
1. Remove the bobbin housing (3) with the bobbin.
2. Adjust the tensioning spring (1) via the regulating screw (2)
until the correct tension is set.
3. Insert the bobbin housing (3).
CAUTION
Risk of injury from the point of the needle and
moving parts
Only set the hook thread tension with the sewing
automat switched off.
③
②
①
(1) - Tensioning spring
(2) - Regulating screw
(3) - Bobbin housing