Setting The Loop Stroke Position - Dürkopp Adler 567 CLASSIC Service Manual

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.
Fig. 28: Loop stroke position - position of the hook tip
The loop stroke is precisely 2 mm.
Order
First check the following settings:
• Needle bar linkage ( 10 Aligning the needle bar linkage, page 33)
• A straight and undamaged needle must be inserted
Correct setting
Machine is locked in place at position 1 ( page 16).
 The hook tip (2) points exactly to the vertical center line (1) of the
Fault caused by an incorrect setting
• Missing stitches
Cover
• Tilt the upper section ( 3.3.1 Access to the machine bottom section,
• Feed-dog ( 3.3.7 Removing and installing the feed-dog, page 15)
38
WARNING
Risk of injury.
Risk of crushing injuries and stab wounds from mov-
ing and sharp parts.
Switch off the sewing machine before checking and
setting the loop stroke position.
(1) - Vertical center line of the needle
(2) - Hook tip
( Operating manual section, Inserting and replacing the needle)
needle.
page 10)
Position of the hook and needle
Service manual 567 classic - 01.0 - 10/2015