Symmetry Of Looper Motion - Duerkopp Adler 744-122 Service Instructions Manual

7.7 Symmetry of looper motion

Turn main switch off
- Risk of Injury -
Symmetry of looper motion means that in the
direction of machine rotation from notch A to notch
D the indicator 1 makes a pendulum movement to
the left from marking 2 and returns again precisely
above the marking 2 when D is reached.
Adjustment occurs after loosening the timing belt
pulley by turning the lower shaft 5.
Indicator order no. 933 80194
Angle order no. 933 80193
The adjustment is conducted as follows:
– Insert the arresting pin into notch A.
– Fasten the angle 3 to the hook drive housing.
– Set the indicator 1 on the hook shaft so that the
tip is over the marking 2.
– When turning the handwheel from A to D the
indicator should swing to the left. When
arresting in notch D the tip should again be
over the marking 2.
– By turning the lower shaft 5 and adjusting the
angle, agreement is reached in both positions A
and D.
– Further turning of the handwheel in the
direction of machine rotation from position D to
position A swings the indicator 1 to the right
and back again to the marking 2.
This pendulum movement to the right occurs
automatically because of the previously set left
pendulum movement.
18
5 4
1
2
3