Service Instructions Automatic Single-Head Serging Machine 1265-4
Beisler GmbH
C-13
C.5
Maintenance
C.5.5 Transport unit toothed belts
The transport unit consists of three components that are each driven by
a toothed belt:
Stepper motor
puller (fabric transport)
roller (assist transport)
Replacing the stepper motor toothed belt:
1. Lower the transport unit manually onto the working plate as descri-
bed in Section D, Programming Instructions.
2. Switch the machine off.
3.
Fig. 4:
Slacken the toothed belt
2
by removing the locating screw
3
of the stepper motor mounting plate.
4. Lift the toothed belt out of the stepper motor drive roller
1
, then re-
move it over the puller transport roller
6
after unscrewing the pres-
sure cylinder rod from the lower suspension
4
.
5. To install, route the belt over the puller linkage, install it to the shaft
drive roller, then install it to the stepper motor drive roller.
6. To pretension the toothed belt, push the plate with the stepper motor
down and tighten the locating screw
3
. If the pretensioning is cor-
rect, it must be possible to depress the center of the belt approx 5
mm while counterpressure is felt.
7. Install the pressure cylinder rod to the mounting block and secure it
using the screws.
Replacing the puller toothed belt:
1. Lower the transport unit manually onto the working plate as descri-
bed in Section D, Programming Instructions.
2. Switch the machine off.
3.
Fig. 4:
Slacken the toothed belt
5
by
loosening the Allen screw
7
at the bea-
ring and pushing the spacer shaft with
the transport roller
6
up.
4. Remove the toothed belt from the drive
roller and from the idle roller.
5. To install, place the toothed belt into the
idle rollers and drive roller. Pretension
the belt by sliding the spacer shaft with
the transport roller down and tightening
the Allen screw
7
. If the pretensioning
is correct, it must be possible to depress
the center of the belt approx 10 mm
while counterpressure is felt.
Fig. 4
