Alignment Of The Needle Bar's Center Of Rotation To The Looper Turret's Center Of Rotation - Duerkopp Adler 579 Service Instructions Manual

30. Alignment of the Needle Bar's Center of Rotation to the Looper Turret's
Center of Rotation
1
2
3
4
5
ATTENTION !
This setting is to be made only in exceptional cases, as a rule, this
setting is not necessary.
The sewing mechanism is aligned at the factory so that the needle
bar-center of rotation and looper turret-center of rotation lie above one
another. This position is secured by the positioning screws 1 and 4
and the fastening screws 2 and 3.
The needle bars's center of rotation is correctly aligned when the
clearance between needle 6 and point of the looper 7 is always equally
large during the needle bar-looper turret rotation (see illus.).
Caution Risk of Injury!
Adjust the setting of the needle bars's center of rotation only in the
"Safe Stop" position or with the machine turned off.
Rule and Control
Turn the handwheel until the left looper point lies at the middle of
–
the needle. Check the clearance between needle and looper point
in the following positions.
1. Looper turret base position
2. Looper turret turned 90° manually
3. Looper turret turned 180° manually
Correction
Loosen fastening screws 2 and 3 slightly.
–
By way of exception, loosen the yellow-sealed positioning screws 1
–
and 4 slightly.
Move guide 5 of the needle bar slightly.
–
Tighten positioning and fastening screws 1,2,3 and 4.
–
Check the position of the point of the looper 7 to the needle 6 in
–
the 3 positions described above and repeat the correction, if
necessary.
6
7
3
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