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Operation
Operating manual 969 - 00.0 - 08/2014
Setting needle thread tension on Classic machines
On Classic machines, the key (3) can be used while sewing to
switch to a second thread tension, e.g. if different material should
be used in the middle of a seam.
Fig. 18: Setting needle thread tension on Classic machines
①
②
③
(1) - Additional tensioner
(2) - Primary tensioner
(3) - Key on keypad for switching thread tension
(4) - Preliminary tensioner
1. Set the tension on the pre-tensioner (4), sew a test seam and
cut the thread.
The end of the thread in the needle should be between
60 - 80 mm.
If the thread is shorter than this:
Gradually reduce the tension on the auxiliary tensioner until
the desired length is reached.
If the thread is longer than this:
Gradually increase the tension on the pre-tensioner until the
desired length is reached.
2. Press the key for switching thread tension (3) until the LED
turns off.
The auxiliary tensioner (1) is automatically activated.
3. Sew the material requiring a lower needle tension and regulate
the tension on the main tensioner (2) until the correct thread
interlace is achieved.
4. Press the key (3) for switching the thread tension.
The key lights up and activates the auxiliary tensioner (1).
5. Sew the material requiring a higher needle tension and regu-
late the tension on the main tensioner (1) until the correct
thread interlace is achieved.
④
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