Dürkopp Adler 667 PREMIUM, Service Instructions Manual

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Setting the needle thread tension
56 Service Instructions 667 PREMIUM - 03.0 - 01/2018
11 Setting the needle thread tension
11.1 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, thread strength, and stitch length.
• Lower needle thread tension: thin sewing material, low thread
strengths
• Higher needle thread tension: thick sewing material, high thread
strengths
Proper setting
The loop of the needle thread slides at low tension over the thickest point
of the hook, without forming loops or snagging.
To set the needle thread tension:
FIg. 40: Setting the needle thread regulator
1. Turn the handwheel and observe the cycle of the needle thread around
the hook.
2. Loosen the screw (1).
3. Move the needle thread regulator (2)
CAUTION
Risk of injury from sharp and moving parts!
Puncture or crushing possible.
Switch off the machine before setting the needle
thread tension.
(1) - Screw (2) - Needle thread regulator
①
②