DURKOPP ADLER 670 Operating Instructions Manual page 30

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Important
The thread interlacing must be exactly in the middle of the sewing
material. With thin sewing material, excessive thread tension can
lead to undesired gathering and thread breaking.
To set the main tensioner:
1. Set the main tensioner (4) so that an even stitch pattern is
achieved.
• Increase the tension: turn clockwise
• Reduce the tension: turn counterclockwise
Setting the additional tensioner
The additional tensioner (5) is used to quickly adjust the needle
thread tension, e.g. for thickened seams.
The additional tensioner (5) can be switched off at the thickened
seam to loosen the seam. To tighten the seam, the additional
tensioner (5) is switched back on after the thickened seam.
To set the additional tensioner:
1. Set the additional tensioner (5) so that an even stitch pattern
is achieved.
• To increase the tension:
Turn adjusting wheel clockwise
• To reduce the tension:
Turn adjusting wheel counterclockwise
Operating Instructions 670/680 - 00.0 - 01/2017
Operation