General - Duerkopp Adler 550-12-12 Service Instructions Manual

1. General

ATTENTION !
The tasks described in the service instructions may only be conducted
by specialists or appropriately trained personnel !
Caution Risk of Injury !
During repair, conversion and maintenance work turn the main switch
off and disconnect the sewing unit from the pneumatic supply line.
Adjustment work and function tests with the machine running are to be
conducted only while observing all safety measures and with extreme
caution.
E
A
1 2
The machine head is equipped with setting aids which make it possible
to set the machine quickly and easily.
With the timing pin 1 and an adjustment disc 3 attached to the timing
belt pulley of the arm shaft the sewing unit can be arrested in 5 setting
positions.
Depending on the selected position 1 to 5 notches of the timing pin 1
are visible (2 = housing wall).
A = 1 notch visible.
B = 2 notches visible.
C = 3 notches visible.
D = 4 notches visible.
E = 5 notches visible.
D
C
B
3
Adjustment disc to the arm shaft crank.
Thread take-up disc.
Stroke and advance cam.
Setting lower timing belt pulley.
Looping stroke and needle bar height.
Symmetry of looper motion.
3