In smaller sized greenhouses, a manual system opened and closed yourself could possibly be installed. These work easiest when the Motor Gearboxes For Greenhouse screen materials is supported by a track system.

Start time – when in the morning will the screen system start operation
Stop period – when in the afternoon will the screen system stop operation
Light level – at what light intensity will the screen be activated either to open or close
Maximum/minimum temperature – what are the limitations of temperature desired
Maximum/minimum humidity – What exactly are the limits of humidity desired
Gap positions – this sets the percent open or close position under different conditions such as early on a winter early morning to reduce thermal shock or during the summer to supply better shading. The gap techniques and speed of movement can be controlled in a few systems.
Time delay – below changeable weather conditions this avoids frequent starting and closing
Wind speed – To reduce high temperature loss, the screen can be closed early under high wind speed conditions
Snow detection – this can open the screen and turn on the heat when it starts to snow.
The standard system uses nylon monofilament or stainless cables to support the screen materials. The screen material can possibly rest along with the network of cables or end up being suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that moves the leading edge of the screen materials. Control can be either with a manual change or electronic controller.

Based on the over, the grower must enter the following parameters in to the controller:

A climate station is needed to provide outdoor light level, temperature, humidity, wind and rain or snow conditions.