Chapter 7: Maintenance
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Operators & Maintenance Manual GENIUS Compact Version UK 0.1 © BESTnv
BESTnv Industrial Research BV, Marinus van Meelweg 20, 5657 EN, EINDHOVEN, THE NETHERLANDS
General tel. +31 (40) 292 2622 - Service tel. +31 (40) 292 2620 - Fax. +31 (40) 292 2633 - Email: service.BESTnv@bestnv.com
Tracking of Detection Belt
To prevent the belt from deviating from the transport direction, the drive drum is slightly spherical. On top
of that, the tracking of the belt must be fi nely tuned when placing a new belt.
Tracking should always be checked and adjusted after the belt has been set to the correct tension. The
tracking can be adjusted by tensing the drive drum (moving it further away from the centre of the machine)
or loosening it (moving it closer to the centre of the machine).
Please keep in mind that both too high and too low a tension on either side must be avoided. Always
make sure to do all tensing on the same side of the machine (e.g. always do tracking on side opposite
to belt motor). This will make it impossible to put too much tension on the belt, because the tension on
one side of the belt will always remain constant.
Belt Tracking Procedure:
1. If the belt deviates to one side, tense the drive drum on the opposite side, or loosen the drive drum
on the same side, until the belt tracks nicely in the middle. (e.g.: belt deviates to right (always as seen in
transport direction), tighten drum to the left or loosen to the right)
Simple rule: - Always tense the belt to make it run away from you, and loosen it to make it
come towards you (see picture).
Attention! - Always check what happens when turning the spanner up or down.
- Always do tensing and loosening of belt on the same side (e.g. always on the
side opposite to the belt drive motor (to prevent too much tension on the belt).
- Always use small steps, and make sure that the maximum belt tension
(0.5% or 1005 mm for large return axle; 0.3% for small return axle) is never
reached on either side of the belt, for this could damage belt and/or bearings.
- Make sure the Drive Drum is fastened securely after adjusting it.
2. Verify that the belt keeps tracking in the middle for a little while (+/- 5 min) and then switch off belt.
(E.g. draw a line right next to the belt and check whether the distance between line and belt stays
constant.)
3. Remove the marks and position the inner and outer scrapers in such a way that they lightly touch the
belt.
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