Operation
Operating Instructions 1767 - 00.0 - 12/2016 33
4.7.1 Setting the needle thread tension
The 3 adjusting wheels on the tensioning screw triangle determine
the needle tension.
In the basic position, the top of the adjusting wheel is flush with
the screw in the center.
Fig. 15: Setting the needle thread tension
Main tensioner
Proper setting
The main tensioner (2) determines the normal tension during
sewing.
Set the main tension as low as possible.
Fault due to excessively high needle tension
• Ruffling on the seam
• Thread breaking
To set the main tensioner:
1. Turn the adjusting wheels (2).
• Increase the needle thread tension: Turn the adjusting
wheels (2) clockwise
• Reduce the needle thread tension: Turn the adjusting
wheels (2) counterclockwise
(1) - Pre-tensioner (2) - Main tensioner
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