Technical data

Operating the sewing unit
Operating manual 743-221-01 version 01.0 - 09/2013
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5.3 Adjusting the needle-thread tension
Fig. 5: Adjusting the needle thread tension
Main tension
The main tensioner (1) should generate the adequate needle thread ten-
sion for the particular material and needle thread
• Turn the knurled nut accordingly.
Turn the knurled nut in clockwise direction = Increase the tension
Turn the knurled nut in counter-clockwise direction = Decrease the tension
(1) - Main tensioner
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