In smaller sized greenhouses, a manual program opened and closed Rack Drive For Greenhouse yourself could be installed. These work simplest when the screen materials is supported by a track system.

Start time – when each morning will the display system start operation
Stop period – when in the afternoon will the display system stop operation
Light level – in what light intensity will the screen be activated either to open up 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 pieces the percent open up or close position under different circumstances such as in early stages a winter morning to reduce thermal shock or through the summer to provide better shading. The gap guidelines and speed of motion can be controlled in some systems.
Time delay – below changeable weather conditions this avoids frequent opening and closing
Wind speed – To lessen heat loss, the screen could be closed early below high wind speed conditions
Snow detection – this can open the display screen and turn on the heat when it begins to snow.
The standard system uses nylon monofilament or stainless steel cables to aid the screen material. The screen material can possibly rest on top of the network of cables or be suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that techniques the industry leading of the screen material. Control is definitely either with a manual switch or electronic controller.

Based on the above, the grower must enter the next parameters into the controller:

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