Dürkopp Adler 650-16 Operating Manual page 23

Operation
Steps
1. Turn the adjusting screw (3) back so that the tension of the
2. Bend the brake spring (1) so that half the recommended value
3. Insert a bobbin into the upper bobbin casing and thread in the
4. Insert the bobbin casing with bobbin into the hook.
5. Grasp the free end of the thread tightly in one hand.
6. Turn the handwheel until the sewing machine has performed
7. Pull the hook thread to the top of the stitch hole using the
8. Pull the hook thread in the direction of sewing at an angle of
9. Then tighten the adjusting screw (3) until the recommended
Instruction manual 650-16 Version 00.0 - 07/2013
Fig. 9: Adjusting the hook thread tension
(1) - Brake spring
tension spring (2) is completely relieved.
of the hook thread tension is applied by the brake spring.
hook thread ( Chap. 8.4 Winding on the hook thread, p. 18).
a single stitch.
needle thread.
45°. You should feel about half the tension value.
tension value is produced.
1
2
(2) - Tension spring
(3) - Adjusting screw
3
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