Short thread cutter
88 Service Instructions 1767 - 00.0 - 12/2016
17.4 Setting the cutoff position
Proper setting
The default is that the cutoff position is at 65° on the handwheel (thread
lever at top dead center). When the machine is at the 65° position on the
handwheel, the control cam (5) is at its highest point.
Fig. 71: Setting the cutoff position
To check the cutoff position:
1. Turn the handwheel to the 0° position (thread lever at top dead center).
2. Loosen the locking latch (8).
3. Swing out the thread-pulling knife (1) manually. To do this, press the
lever (7) with the roller to the right (3) against the control cam (5).
4. Insert a thread into the thread-pulling knife (1).
5. Use the handwheel to turn the machine until the thread is cut shortly
before reaching the marking (2).
6. Check if the cut was made at the 65° position on the handwheel.
To set the cutoff position:
1. Loosen the threaded pins (6) on the control cam (5).
2. Move the control cam (5) towards the clamping ring (4) until it makes
contact and correct the position of the control cam (5).
3. Tighten the threaded pins (6) on the control cam (5) again.
4. Check the position as described above under Proper setting and
correct the position again if necessary.
(1) - Thread-pulling knife
(2) - Marking
(3) - Roller
(4) - Clamping ring
(5) - Control cam
(6) - Threaded pins
(7) - Lever
(8) - Locking latch
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