23
3.11.2 Replacing the indented belt
To observe: in machines with Mini-stop first remove the driving toothed
belt as instructed in par. 3.13.
When replacing the indented belt, the mutual position of the pulleys (4
and 5) should be maintained.
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- Remove the handwheel, the belt guard and the V-belt.
- Remove the retaining ring (1) and remove the backtacking lever (2).
- Mark with a pencil the instantaneous position of the indented pulleys
against the machine head in any position.
- Remove the indented belt (3) from the bottom indented pulley (4)
first, and then remove the whole belt.
- Apply a new indented belt on the top indented pulley (5) first.
- Turn both indented pulleys in the formerly marked positions and
apply the indented belt on the indented pulley (4).
- Tension the belt and mount the dismantled components in the inverse
order.
3.12 V-belt, motor - head
3.12.1 Tensioning
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
The belt is correctly tensioned, when the opposite sides of the belt
approach one to another by up to 20 mm in applying the force of 10 N.
The belt is tensioned in turning respectively the motor in its holder.
3.12.2 Replacing the V-Belt
Caution! Danger of injury!
Switch off the main switch! before starting the setting
operation, wait until the motor stops!
- Loosen the screw (1) of the positioner arrest (2) and tilt the arrest.
- Unscrew the screws (3) of the handwheel.
- Unscrew the screws (4) of the belt guard and tilt the guard.
- Remove the belt guard of the motor and tilt the protections against
falling out the belt from the motor pulley.
- Replace the belt.
- Tension the belt (see par. 3.12.1).
3.13 Driving toothed belt
3.13.1 To exchange the driving toothed belt
Caution! Danger of injury!
Switch off the main switch! before starting the setting
operation, wait until the motor stops!
- Remove the machine head from the stand (uncouple the motor cables,
the machine head cable, the position sensor, and screw off the wood
screw and the screw from the hinges).
- Remove the belt guard (1).
- Replace the belt (2).
3
2 1 4
5
1
4
3
2
10 N
10 N
l - 20mm
2
1
