Operation Manual

Underthread tension
The underthread tension is set by turning the knurled nut 3 on the hook bracket.
Tension increase = turn to the right
Tension decrease = turn to the left
Thread pull-on spring for the underthread
The thread pull-on spring 1 influences the pull-on of the underthread through its stopper
width and pre-tension and thus the form and beading of the buttonhole.
Setting the stopper width: Loosen screw 5 and turn the angle 4.
Setting the pre-tension: Loosen screw 6 and turn angle 2.
Gimps
The upper and lower gimp should be pulled easily and uniformly from the guide hole in
the needle plate and the gimp guider.
For a faultless appearance of the buttonhole a braking or clamping of the gimp on its
way to the sewing station is to be avoided.
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