Dürkopp Adler M-TYPE H867, Руководство по обслуживанию

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