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Bandsaw
N3700 e-classic / N3800 / N4400
8 Service
8.1 Safety instructions
Warning! Risk of injury! Improper adjustment and setup work can lead to serious physical injury or
material damage. For this reason, this work may only be carried out by authorised, trained personnel who
are familiar with how to operate the machine and in strict observance of all safety instructions.
• Before beginning any maintenance work on the
machine, switch it off and secure it against acciden-
tally being switched on again.
• Before commencing any work with the machine,
inspect it to ensure that it is complete and in
technically good condition.
• Ensure that there is sufficient space to work around
the machine.
• Keep the work area orderly and clean. Components
and tools that are not put in their correct place or put
away may be the cause of accidents!
• Install the safety equipment according to the
instructions and check that it functions properly.
Warning! Danger! Electric current! Work on electrical fittings may only be carried out by qualified
personnel and in strict observance of the safety instructions.
Fig. 8-1: Drive belts
8.2 Tightening/replacing the drive belt
Over time, the drive belt will lose its capacity to transmit
power. At this point, the drive belt must be re-tensioned
or replaced.
The drive belt must be inspected monthly; if tears are
discovered, the drive belt must be replaced.
Attention! Risk of material damage! Do not over-tension the drive belt! Stop turning the belt-tensioning
screw once the drive belt is tensioned sufficiently, enabling it to transmit power effectively.
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Nut
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Tightening screw
Following the first few operating hours, the belt tension
has to be controlled, as the belt will extend.
To check the tension, press inwards onto the belt in the
middle with a weight of 3-4 kg.
The belt deflection should not be more than 5-6 mm.
Retensioning the drive belt:
1.
Loosen the nuts.
2.
Use the belt tensioning screw to tension the drive belt.
3.
Tighten the nuts.
It is important to always maintain the correct belt tension,
as belts which are too loose will weaken the drive power
and the brake power and belts which are overtightened
will lead to overheating.
Service
