Thread trimmer
70 Service Instructions 867 - 04.0 - 10/2019
To adjust the height of the thread-pulling knife:
1. Open the throat plate slides ( p. 18).
2. Loosen the screw (5).
3. Remove the thread-pulling knife (2).
4. Place as many washers between thread-pulling knife (2) and knife
carrier (4) as necessary to ensure that the upper edges of the counter
blade (1) and thread-pulling knife (2) are at the same height.
5. Keep any non-required washers on the top side between the thread-
pulling knife (2) and screw (5).
6. Tighten the thread-pulling knife (2) using the screw (5).
15.2 Adjusting the cutoff curve
Fig. 57: Adjusting the cutoff curve (1)
Proper setting
The control cam (4) makes direct contact with the set collar (2).
The distance between the widest extent (6) of the control cam (4) and
the roller (1) is 0.1 mm at most.
In resting position, the circle mark on the cutting edge of the thread-pulling
knife is exactly next to the tip of the counter blade.
To adjust the cutoff curve:
1. Tilt the machine head ( p. 14).
2. Open the throat plate slides ( p. 18).
3. Loosen the threaded pins (3) on the set collar (2).
4. Push the set collar (2) as far as it will go to the left.
5. Tighten the threaded pins (3) on the set collar (2).
(1) - Roller
(2) - Set collar
(3) - Threaded pins
(4) - Control cam
(5) - Threaded pins
(6) - Widest extent
(7) - Actuating lever
(8) - Clamping screw
(9) - Solenoid
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