Operation Manual

Operation
Operating manual 171/173 Version 01.0 - 01/2016 29
Fig. 14: Adjusting the thread tensions
Adjusting the thread tension
• T
o increase the tension:
Turn the adjusting wheel (1 or 2) for the relevant thread
clockwise.
• T
o reduce the tension:
Turn the adjusting wheel (1 or 2) for the relevant thread
coun
terclockwise.
5.6.3 Adjusting the needle thread quantity
The needle thread quantity released for stitch formation is deter-
mined by the position of the thread reg
ulator. The required thread
quantity depends on the thickness of the sewing material, thread
strength and seam type. For different threads and seam types,
the threading procedure also differs ( pg. 23).
(1) - Adjusting wheel, needle
thread tension
(2) - Adjusting wheel,
looper thread tension
①
②
Risk of injury from moving parts.
Switch the sewing machine off before adjusting
the thread regulator.
WARNING