Setting The Cutting Pressure - Dürkopp Adler 867-M PREMIUM Service Instructions Manual

15.3 Setting the cutting pressure

Fig. 61: Setting the cutting pressure
(1) - Screw
(2) - Counter blade
(3) - Thread-pulling knife
The shape of the thread-pulling knife automatically creates the required
cutting pressure as soon as the thread-pulling knife and counter blade
make contact.
Proper setting
In resting position, the hook thread clamp makes contact with the thread-
pulling knife without any pressure being applied. Any 2 threads with the
greatest strength used for sewing can be neatly cut simultaneously.
Disturbance
Disturbances caused by an incorrect setting:
To set the cutting pressure:
1. Open the throat plate slide ( p. 20)
2. Turn the handwheel until the thread-pulling knife (3) can be swung out
3. Loosen the screw (1).
4. Position the thread-pulling knife (3) so that the arrow mark is exactly
5. Turn the hook thread clamp (5) so that it rests against the thread-pulling
6. Turn the counter blade (2) so that it rests against the thread-pulling
7. Tighten the screw (1).
8. Check the position of the cutters, since the counter blade can easily
72
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• Increased knife wear when the pressure is too great
• Problems when sewing on if the clamping pressure is too high
• Problems in cutting the thread
by hand.
next to the tip of the counter blade (2).
knife (3).
knife (3).
become warped when the screw is being tightened.
(4) - Screw
(5) - Hook thread clamp
(6) - Screw
Service Instructions 867-M PREMIUM - 03.0 - 05/2017
Thread cutter
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