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Position of the hook and needle
11.2 Setting the loop stroke position
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.
Figure 36: Loop stroke position - position of the hook tip
The loop stroke is exactly 2.4 mm in the H867.
Sequence
First check the following settings:
• Needle bar linkage
• A straight and undamaged needle has to be inserted
Correct setting
Machine locked in place in the loop stroke position (
Faults caused by an incorrect setting
• Missing stitches
Cover
• Tilt the upper section backwards
• Feed-dog
Service manual H867 Version 00.0 - 08/2013
WARNING
Risk of injury
Switch off the sewing machine before checking and setting the
loop stroke position.
(1) - Vertical center line of the needle
(2) - Hook tip
(
Section 10 Aligning the needle bar linkage, page 41)
(
Betriebsanleitung Kap. 7.3 Nadel einsetzen und wechseln)
The hook tip (2) points exactly to the vertical center line (1) of the nee-
dle.
(
Section 4.4.1 Access to the machine bottom section, page 10)
(
Section 4.4.7 Removing and inserting the feed-dog, page 15)
page 16):
47
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