Thread trimmer
62 Service Instructions 827/827-M - 01.0 - 05/2019
14.3 Adjusting the cutting pressure
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.
Fig. 45: Adjusting the cutting pressure
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
• Increased knife wear when the pressure is too great
• Problems when sewing if the hook thread clamp is too high
• Problems in cutting the thread
To adjust the cutting pressure:
1. Open the throat plate slide ( p. 18).
2. Turn the handwheel until the thread-pulling knife (3) can be swung out
by hand.
3. Loosen the screw (1).
4. Position the thread-pulling knife (3) such that the arrow mark is exactly
next to the tip of the counter blade (2).
5. Turn the hook thread clamp (5) such that it rests against the thread-
pulling knife (3).
6. Turn the counter blade (2) such that it rests against the thread-pulling
knife (3).
7. Tighten the screw (1).
Important
Check the position of the cutters, since the counter blade can easily
become warped when the screw is being tightened.
(1) - Screw
(2) - Counter blade
(3) - Thread-pulling knife
(4) - Screw
(5) - Hook thread clamp
(6) - Screw
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