Setting the hook and the needle bar
Service Instructions 878-M PREMIUM - 03.0 - 10/2019 39
8. Tighten the screws (6) and the screw (8).
9. Check the position of the looping stroke ( p. 39).
10. Tighten the threaded pins (1) of the clamping ring (2).
11. Remove the lock.
Order
Then, check the following settings:
• Position of the needle guard ( p. 39)
10.5 Setting the needle guard
The needle guard prevents any contact between the needle and the hook
tip.
Order
First, check the following setting:
• Loop stroke position ( p. 39)
• Side distance of the hook ( p. 38)
• Height of the needle bar ( p. 40)
• A straight and undamaged needle has been inserted ( Operating
Instructions)
Proper setting
The machine is locked in position 1 ( p. 15).
The needle guard pushes the needle away to avoid contact with the hook
tip.
1. Set the maximum stitch length based on the sewing equipment used.
2. Disassemble the throat plate ( p. 18).
Fig. 27: Setting the needle guard
3. Turn the handwheel to check how far the needle guard (3) has pushed
the needle.
(1) - Screw
(2) - 3 mm Allen wrench
(3) - Needle guard
(4) - Needle
(5) - Hook tip
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