Machine head
70 Service Instructions 745-35-10 S/745-35-10 A - 02.0 - 04/2017
Close the thread clamping plates (5).
The hook thread trimmer (1) cuts off the hook threads.
The hook thread trimmer (1) is cleaned with a blast of air during each work
cycle. This prevents any fluff and threads ends from being clamped.
Proper setting
The upper edge of the hook thread trimmer (1) must be level with the top
side of the throat plate. If the hook thread trimmer is set too high, the sew-
ing material may become damaged.
If the hook thread trimmer is set too low, the hook threads will not be cut
off.
The limit plates (4) attached on the cylinder (3) set the opening width of
the thread clamping plates (5). Pneumatically opened thread clamping
plates (5) require that both hook tips pass with a safe distance.
Fig. 58: Setting the trimming and clamping device for the hook threads (2)
To set the trimming and clamping device for the hook threads:
1. Loosen the screw (7).
2. Align the openings of the hook thread trimmer (1) with the center of
the thread grooves in the throat plate.
3. Tighten the screw (7).
4. Loosen the screw (6).
5. Adjust the height of the hook thread trimmer (1).
The upper side of the hook thread trimmer (1) and the top side of the
throat plate must be in the same plane.
6. Tighten the screw (6).
(6) - Screw (7) - Screw
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