Thread cutter
Service Instructions 869-M PREMIUM - 00.0 - 07/2018 79
4. Set the thread-pulling knife (3) against the counter blade (4).
5. Tighten the screw (2).
16.4 Setting point in time for cutting
Fig. 65: Setting point in time for cutting
Proper setting
The threads are cut when the thread lever is at the top dead center (hand-
wheel position 60°).
To set the point in time for cutting:
1. Tilt the machine head ( p. 17).
2. Open the throat plate slide.
3. Loosen the threaded pins on the control cam (2).
4. Move the thread-pulling knife (4) to its initial position.
5. Set the handwheel position to 60°.
6. Turn the control cam (2) such that the roller (1) runs up at the contour
of control cam (2) and the widest extent of the control cam (2) is at
handwheel position 60° at the highest point.
7. Tighten the threaded pins on the control cam (2).
8. Check setting:
• Insert the thread into thread-pulling knife (4) and slowly turn the
handwheel.
• Check the handwheel position at which the thread is cut.
9. If necessary, repeat setting steps 1 – 7 until the cut takes place at 60°.
(1) - Roller
(2) - Control cam
(3) - Counter blade
(4) - Thread-pulling knife
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