Short thread cutter (KFA)
Service Instructions 867 - 04.0 - 10/2019 81
16.5 Adjusting point in time for cutting
Fig. 67: Adjusting point in time for cutting
Proper setting
The default is that the time for cutting 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.
Cover
• Open the throat plate slides ( p. 18)
• Disassemble the throat plate ( p. 19)
• Disassemble the feed dog ( p. 20)
Checking the proper setting
To check the proper setting:
1. Turn the handwheel to the 0° position (needle bar at top dead center).
2. Loosen the locking latch (8).
3. Press the lever (7) with the roller (3) to the right against the control
cam (5).
4. Swing out the thread-pulling knife (1) manually.
5. Insert thread into the thread-pulling knife (1).
6. Use the handwheel to turn the machine until the thread is cut shortly
before reaching the marking (2).
7. Check if the cut was made at the 65° position on the handwheel.
(1) - Thread-pulling knife
(2) - Marking
(3) - Roller
(4) - Set collar
(5) - Control cam
(6) - Threaded pins
(7) - Lever
(8) - Locking latch
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