Maintenance of the Machine
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9.4 Tensioning or Replacing Ribbed V-belt
In order to carry out the various maintenance and repair work on the electrical
system and the drive unit, the protective hood of the machine must be disman-
tled.
Danger
Danger by electric voltage.
Maintenance work on electrical components may only be carried out by au-
thorized personnel (electricians). Make sure that the electrical equipment of
the machine is de-energized for the period of maintenance.
Wait at least 15 minutes before removing the protective hood of the machine.
The DC bus capacitors must first discharge themselves independently during
this period.
1. Remove the protective hood from the machine head (see
section 9.3 Installing/removing the protective hood, page
65).
After that, the complete drive area incl. frequency con-
verter will be accessible.
2. First check the condition and tension of the ribbed V-belt.
The ribbed V-belt
Must be aligned on both pulleys. A misaligned ribbed
V-belt will be very quickly worn or damaged
Must not be scratched, frayed or cracked over the en-
tire circumference
Must have sufficient tension.
The correct tension is given if the ribbed V-belt be-
tween the pulleys can be pressed in 3–5 mm and the
front pulley can still be turned by hand.
3. Also check the two pulleys for damage and wear.
If you notice when checking that the ribbed V-belt
Is not tensioned correctly, it must be tightened.
Is damaged, it must be replaced by a new one.
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