Ambient Conditions 1
When configuring a conveyor, we assume the usual ambient conditions in the production facility. That
is, the application is indoors at room temperature (RT), in a clean environment with the usual humidity of
< 60% and there is no condensation or dripping water.
Generally the range from +10° to +60° C is non-critical. In special cases (e.g. over longer lengths with a
temperature differential greater than 50° C), the elongation of the installed components in length must be
taken into account. Low temperatures down to -20° C are possible on request. Ambient temperatures
above 80° C are only briefly permissible for most plastics. Ambient temperatures higher than 150° C are only
permissible for aluminium base structures after testing. However, the temperatures for contact between the
product and transport medium of up to 200° C are possible when using steel chains.
We are happy to provide consultation for applications in cleanrooms and sterile areas, applications with
hygiene or pharmaceutical specifications, usage in harsh environmental conditions, potentially explosive
atmospheres and painting applications.
Continuous Operation/Accumulated Operation
In continuous operation, the conveyor and the product run without interruption. The goods to be conveyed are
supplied to the running conveyor and conveyed further. During accumulated operation, the conveyor continues
to run below the accumulated, stationary product. Note that the motor power during accumulated operation
must be approximately twice as high as it is in continuous operation (see diagram on page 12).
The conveyor is switched on and off as needed. This is usual for parts discharge or manual removal. We also
always recommend on/off operation to reduce wear if it is foreseeable that no action will occur for more than
30s. For clean rooms especially, this is strongly recommended to avoid unnecessary contamination. If the conveyor
is deactivated more than four times per minute, this is classified as cycling operation (startup with a load
only with a soft start).
As a rule, the cycling operation is a fixed cycle that is repeated. If there are more than 30 cycles per minute,
servo drives are usually required. Rates of more than 60 cycles per minute are available on request, but they
require a detailed assessment of the application. The time available for transport and the required acceleration
are important for the motor configuration. During acceleration, pay attention to the static friction of the product
on the transport medium. See page 12 for additional information.
For positioning operation, the product is usually positioned with pinpoint precision in a controlled machining
process, so that it then can be picked off, for example. For positioning operation, the specification of the
accuracy to be achieved is important. Repeatability means that the product is repeatedly moved to the same
point under the same conditions. Positioning accuracy is the absolute accuracy even with changing loads.
Positioning accuracy in a range of ± 10 mm is possible with simple devices, such as initiators or light barriers.
As a rule, the range of ± 5 mm requires a positive-locking drive and control with signal transducers. The range
of ± 1 mm represents the transition to the linear technology. This accuracy, including transverse to the conveying
direction, requires the means of transport to be guided precisely and the position of the product to be
fixed on the conveyor.
Information on Conveyor Technology