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Order
First, check the following settings:
• Needle bar linkage ( p. 33)
• A straight and undamaged needle has to be inserted ( Operating
Proper setting
Machine is locked in place at position 1 ( p. 28).
The hook tip (3) is precisely at the center (1) of the needle.
Disturbance caused by an incorrect setting
• Missing stitches
Cover
• Swivel up the machine head ( p. 15)
Fig. 25: Setting the loop stroke position (2)
(1) - Clamping ring
(2) - Threaded pins
To set the loop stroke position:
1. Lock the machine in place at position 1 ( p. 28).
2. Loosen all 4 threaded pins (5) for the clamping ring (4) on the hook
3. Rotate the hook such that the hook tip (7) is precisely at the center of
4. Tighten the threaded pins (5) for the clamping ring (4).
5. Remove the lock (
Order
Then check the following settings:
• Position of the needle guard ( p. 40)
• Timing of cutting by the thread cutter ( p. 79)
35
Instructions)
shaft.
the needle (6).
(3) - Groove
(4) - Hook tip
p. 29).
Service Instructions 911-211 - 02.0 - 10/2016
Machine head
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