Technical data

Operating instructions
76 Operating manual 806N Version 00.0 - 12/2012
5.8.3 Adjusting the hook thread tension
Together with the needle thread tension, the hook thread tension influ-
ences the final appearance of the seam. Test runs must be performed to
determine the correct setting for a high quality seam appearance.
Figure 50: Bobbin with bobbin capsule
You set the hook thread tension as follows:
1. Press the Stop button to place the machine in the Secure hold sta-
tus.
 The secure stop light lights up.
2. Remove the bobbin capsule,  Section 5.2.5 Inserting/changing the
bobbin.
3. Check the thread tension by pulling the thread.
 If the thread is easy to pull and continues to unwind after pulling then
the tension is too low. If the thread is difficult to pull then the tension is
too high. A certain amount of experience is necessary in order to eval-
uate this. If you currently have no experience then perform a number
of test runs to see the seam appearance and determine the ideal set-
tings.
4. To increase the tension, screw in the screw (2) by turning it somewhat
to the right.
 The pressure of the tension spring (1) on the thread increases.
5. To reduce the tension, screw out the screw (2) by turning it somewhat
to the left.
 The pressure of the tension spring (1) on the thread reduces.
6. Cut off the thread about 3-5 cm from the bobbin capsule, using scis-
sors or the cutting clamp on the sewing arm.
7. Fit the bobbin again.
8. Perform a test run to evaluate the seam appearance.
9. Perform further adjustments to the hook thread tension if necessary.
(1) - Tension spring (2) - Screw
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