DURKOPP ADLER 911-211, Service Instructions Manual

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Machine head
Service Instructions 911-211 - 02.0 - 10/2016 56
7. Rotate the take-up lever disk (2) on the arm shaft accordingly.

The switch S100 then switches.
8. Tighten the threaded pin (1).
9. Remove the locking peg (3).
10. Switch off and on the machine again.
11. Check that the needle bar is at top dead center.
4.7 Setting the needle thread tension
4.7.1 Setting the needle thread regulator
The needle thread regulator determines the tension applied to guide the
needle thread around the hook. The required tension depends on the
thickness of the sewing material, the thread strength, and the stitch length.
Proper setting
The loop of the needle thread slides at low tension over the thickest point
of the hook, without forming loops or snagging.
Fig. 41: Setting the needle thread regulator
To set the needle thread regulator:
1. Press and turn the hand crank and monitor the progress of the needle
thread around the hook.
WARNING
Risk of injury from sharp and moving parts!
Puncture or crushing possible.
Switch off the machine before you check and set
the needle thread regulator.
(1) - Screw (2) - Needle thread regulator
+
1 2 3 4
①
②