Operation Manual

Operation
Operating manual 275 Version 01.0 - 01/2016 29
5.6.1 Adjusting the needle thread tension
Main tensioner
The main tensioner (2) determines the normal tension during
sewing.
Figure 10: Adjusting the needle thread tension: Main tensioner
Correct setting
The main tension should be set as low as possible. The thread
interlacing should be exactly in the middle of the material being
sewn.
Faults due to excessively high tension
• Ruffing
• Thread breakage
Adjusting the main tension
• To increase the tension:
Turn the adjusting wheel (2) clockwise.
• To reduce the tension:
Turn the adjusting wheel (2) counterclockwise.
Opening the needle thread tensioner
The main tensioner is automatically opened when the thread is cut.
(1) - Pre-tensioner (2) - Main tensioner
①
②