Adjustments In The Different Handwheel Positions - Duerkopp Adler 171 Service Manual

1.2 Adjustments in the different handwheel positions

For some adjustments the machine must be set in a certain position.
This position is marked by letters on the handwheel and can be locked as follows:
– Turn the handwheel into the position defined for the adjustment.
– Slide the timing pin 4 into the hole of the machine housing.
– Turn the handwheel slightly forward and backward until the timing pin 4 can be slid into the respective
slot of the adjustment disk 1.
– Slot A of the adjustment disk is cut out the deepest.
The depths of the slots B - F are equal.
Slot
A
B
C
D
E
F
Please note!
Depending on the needle bar stroke, the following adjustment disks are built-in:
Class / Subclass
171-131110
173-141110
173-141521
173-161120
6
Adjustment
– The deepest slot A of the adjustment disk at the upper timing belt
pulley is aligned with the groove in the arm shaft crank
– Symmetrical looper motion that is, when turning the handwheel in
reverse direction, the needle point must also be located at the centre
of the needle like in slot C
– Position of the lower timing belt pulley
– Loop stroke
– Needle bar height
– Stroke and thrust eccentric of the feed dog on right-hand machines
– Looper thread take-up cam
– Eccentric for the top puller feed
– Stroke and thrust eccentric of the feed dog on left-hand machines
Needle bar stroke
27 mm
30 mm
30 mm
32 mm
Operating direction
B
4
A F
Adjustment disk
171 1012
171 1512
171 1512
171 2012
C
1
E D