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

Start time – when in the morning will the display screen system start operation
Stop period – when in the afternoon will the screen system stop operation
Light level – in what light intensity will the screen become activated either to open up or close
Maximum/minimum temperature – what are the limits of temperature desired
Maximum/minimum humidity – What are the limitations of humidity desired
Gap positions – this sets the percent open up or close placement under different conditions such as early on a winter early morning to reduce thermal shock or through the summer to provide better shading. The gap measures 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 reduce heat loss, the screen can be closed early under high wind speed conditions
Snow detection – this can open the display and turn on the heat when it begins to snow.
The typical system uses nylon monofilament or stainless steel cables to support the screen material. The screen material can possibly rest on top of the network of cables or end up being 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 usually either with a manual change or electronic controller.

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

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