Position of the hook and needle
50 Service Instructions 867 - 04.0 - 10/2019
To adjust the hook side clearance:
1. Tilt the machine head ( p. 14).
2. Open the throat plate slides ( p. 18).
3. Lock the machine in place at position 1 ( p. 22).
4. Loosen the screws (4) for the hook support (3).
5. Loosen the threaded pins (2) for the set collar (1).
6. Shift the hook support (3) laterally.
7. The distance between the hook tip (6) and the groove of the needle (5)
is maximum 0.1 mm.
The hook tip (6) does not touch the needle.
8. Tighten the screws (4) for the hook support (3).
9. Check the looping stroke position ( p. 50).
10. Tighten the threaded pins (2) for the set collar (1).
11. Remove the lock.
Order
Then check the following setting:
• Position of the needle guard ( p. 52)
10.2 Adjusting the looping stroke position
Fig. 33: Adjusting the looping stroke position (1)
The loop stroke is the path length from the lower dead center of the needle
bar up to the position where the hook tip is exactly on the vertical center
line of the groove for the needle.
The looping stroke is precisely 2 mm.
Order
First, check the following settings:
• Needle bar linkage is aligned correctly ( p. 45)
(1) - Vertical center line of the needle (2) - Hook tip
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