Duerkopp Adler 744-122 Service Instructions Manual page 23

b) The trimmer point must lay on at the front and
be tight but easily moveable on the material
slider bed. This is necessary so that no threads
can get between the trimmer point and the
material slider bed.
– If the trimmer point does not lay on, adjust the
trimmer accordingly.
– Set the trimmer tight with the plastic stopper
14. Manually check for ease of swing.
– When swinging to the left the plastic stopper 14
must hold in the fork 15. Loosen angle 16 and
adjust accordingly.
c) When the counter knife 17 is pulled to rest at
the back by spring pressure, the cutting edges
18 and 19 must overlap by about 1 mm. Three
sewing threads must be cut cleanly.
– Loosen screws 21 and adjust knife 20
accordingly.
– Set the knife 20 level to the counter knife with
the adjustment screws 22.
– Set the trimming pressure with the pressure
screw 23.
The pressure should only be so great that the
threads are cleanly cut and the counter knife 17
moves back unhindered.
– Conduct a trimming trial in testing program P55
with three threads. After entering the program
and operating the
will occur in order.
d) With the counter knife 17 pulled to the back and
knife 20 set as per c) the thread clamp plate 24
should be about 1.5 mm in front of the edge of
the knife 20.
This setting assures that the thread chain is
first clamped and then trimmed.
– Loosen screws 26 and set the thread clamp
plate 24.
– The thread clamp plate must lay on with a slight
pressure.
e) With switched on release stroke the counter
knife 17 should move so far to the front that the
middle of the thread groove 27 lies under the
front edge 28 of the thread clamp plate.
– Enter testing program 55 and switch on the
release stroke position (short stroke) with the
key.
– Adjustment is to be made by altering the push
rod length. For this purpose remove the push
rod 29.
24
key the trimmer functions
16 15
14
22 21 22 23
26
17 20 24
28
27 24 17
29
17
ca. 1mm
20 19 18
ca. 1,5mm
25
26