Thread cutter
76 Service Instructions 869-M PREMIUM - 00.0 - 07/2018
16.2 Setting the cutoff curve
Fig. 62: Setting the cutoff curve (1)
Proper setting
The control cam (2) makes contact with the safety clutch.
The distance between the widest extent of the control cam (2) and
the roller (3) is no greater than 0.1 mm.
In the rest position, the thread-pulling knife should be flush with the tip
of the counter blade.
To set the cutoff curve:
1. Tilt the machine head ( p. 17).
2. Open the throat plate slide.
3. Loosen the threaded pins on the control cam (2).
4. Set the control cam (2) all the way to the right against the safety clutch.
5. Tighten the threaded pins on the control cam (2).
6. Loosen the screw (1).
7. Move the roller (3) such that the distance between the roller (3) and
the widest extent of the control cam (2) is no greater than 0.1 mm.
8. Tighten the screw (1).
(1) - Screw
(2) - Control cam
(3) - Roller
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