Looping Stroke - Duerkopp Adler 558 Service Instructions Manual

28.2 Looping Stroke

a
38
With looping stroke is meant the path that the needle bar travels from
its lowest position to that point where the left or right hook tip lies at
the center of the needle.
The setting of the looping stroke must be made with the maximum
buttonhole width set.
The maximum buttonhole widths and looping stroke dimensions for the
various sewing devices (E no.s) can be found in the Operating
Instructions.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Set the maximum buttonhole width at the guide 2.
–
Set the needle bar 1 in its lower dead center.
–
Find the dimension X from the upper edge of the needle bar to the
bush with the depth gauge of a slide gauge.
–
To the established dimension on the slide gauge add the looping
stroke dimension.
–
Place the slide gauge parallel to the needle bar on the bush again.
–
Move the needle bar up in the amount of the added dimension by
turning the handwheel.
–
After a left-sided needle stitch the left hook tip should and after a
right-sided stitch the right hook tip should lie at the center of the
needle (see illus. a and b).
This setting is achieved by turning the needle bar drive wheel.
Continued on the next page !
2
1
b