Excessive Catenary Sag At The Belt; Maintenance; Your Contact Partners - Ammeraal Beltech uni ACB K800 Installation And Maintenance Manual

9 Excessive catenary sag at the belt

Incorrect total length of the belt
Excessive catenary sag must be detected at the coldest operating temperature of the belt, because the belt
is than contracted to its shortest length If you observe excessive catenary sag, shorten the belt by removing
several module rows All the uni-chains belt can be shortened in increments of one module row
Insufficient belt tension at high temperatures
If excessive catenary sag is caused by thermal expansion due to the operating temperature and is not too large at
cold condition, it may be necessary to fit a tensioning device to the belt, to compensate for the thermal growth
Please contact uni-chains if you need further assistance
Belt elongation due to specific conditions during commissioning or due to heavy loads
During the initial run-in time, a plastic conveyor belt gets longer This is a natural process and is more notice-
able if heavy loads are involved If this is the case, allow the belt some time to adapt to the operating conditions
before shortening it
ATTENTION: Watch and monitor the belt during this run-in time, in order to prevent binding or catching

Maintenance

For the justification of any guarantee claims, a logbook has to be kept for every conveyor to document regu-
lar inspections, maintenance and repair measures All entries have to be counter-signed by the responsible
maintenance manager
Regular inspections and checks include:
· Visual inspection of the belt surface
· Visual inspection of the belt edges
· Visual inspection of the wearstrips
· Visual inspection of the drive and idle sprockets
· Visual inspection of the rollers in the returnway
· Visual inspection of the take-up/ tensioning devices
· Visual inspection of protective devices on gaps and clearances before the drive and idle stations for deposits
of foreign material
· These inspections have to be performed at least once a month
The appropriate cleaning intervals have to be defined by the maintenance manager, as these intervals strong-
ly depend on the ambient conditions Significant amounts of dirt and impurities reduce the useful life of the
modular plastic belts

Your Contact Partners

Ammeraal Beltech provides a 24 hours service Please contact your local Ammeraal Beltech organisation
when service is required
Installation and
Maintenance Manual
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