Description And Adjustment Of Integral Adjusting Disc - Duerkopp Adler 743-221 Service Manual

2.2

Description and adjustment of integral adjusting disc

1
2
3
The sewing machine can be locked in all adjustment positions with
locking pin 3 and the integral adjusting disc 4 on the cogged-belt
pulley of the arm shaft.
The adjusting disc has 6 notches which are marked on the
handwheel 1 by the letters A, B, C, D, E and F. In conjunction with
marking 2 the letters indicate the position of the notches in which the
machine can be locked with pin 3.
Notch A (loop-lift position) is deeper than the other notches.
The following adjustments can be carried out in the various positions:
A adjusting disc with respect to the groove in the arm-shaft crank,
belt wheel, loop lift, distance of shuttle beak from needle
B - no function -
C 2nd needle position (raised thread-lever position)
D - no function -
E needle-bar height
F - no function -
3
A
E
F
4
B
C
D
5