Short thread cutter
82 Service Instructions 867-M PREMIUM - 03.0 - 05/2017
16.5 Setting point in time for cutting
Fig. 69: Setting 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 slide ( p. 20)
• Disassemble the throat plate ( p. 21)
• Remove the feed dog ( p. 22)
Checking the proper setting
To check that the setting is correct:
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) - Clamping ring
(5) - Control cam
(6) - Threaded pins
(7) - Lever
(8) - Locking latch
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