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Thread cutter
5. Tighten the thread-pulling knife (2) onto the knife carrier (4) using the
16.2 Setting the cutoff curve
Correct setting
The control cam (4) makes direct contact with the hook clamping ring (1).
The distance between the widest extent (6) of the control cam (4) and the
roller (3) 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.
Cover
• Tilt the upper section backwards
• Throat plate slide
Figure 58: Aligning the thread-pulling knife sideways - Part 1
Setting steps
1. Loosen the four setscrews (2) on the hook clamping ring (1).
2. Push the hook clamping ring (1) as far as it will go to the left.
3. Tighten the four setscrews (2) on the hook clamping ring (1).
4. Loosen the control cam setscrews (5).
5. Press the actuating lever (7) against the solenoid (9).
6. Turn the control cam (4) such that its widest extent (6) is at the top, next
Service manual H867 Version 00.0 - 08/2013
fastening screw (6).
WARNING
Risk of injury
Switch off the sewing machine before aligning the thread-pull-
ing knife sideways.
(
Section 4.4.1 Access to the machine bottom section, page 10)
(
Section 4.4.5 Opening and closing the throat plate slide, page 13)
(1) - Hook clamping ring
(2) - Setscrews
(3) - Roller
(4) - Control cam
(5) - Control cam setscrews
Important: Screw the four setscrews (2) tightly in place on the hook
clamping ring (1) before you loosen the control cam setscrews (5). The
hook clamping ring (1) and control cam (4) are both mutually used as a
stop and should not be undone at the same time.
to the roller (3).
(6) - Widest extent
(7) - Actuating lever
(8) - Clamping screw
(9) - Solenoid
71
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