Is it possible to replace the linear drive with a servo for opening greenhouse doors?

Question

Arduino

Linear are very expensive, for 4 doors, almost a dozen. Which one will pull? Maybe someone already did? The greenhouse is an ordinary polycarbonate, two doors, each of which is divided into two sections: a window and a half-door.

like this

Answer 1

Window vents, in principle, can be opened by servos. 25 kg is enough, but the door is no longer there, for example, a load from the wind can break the servo.
For an electric drive, it is better to take a geared motor like https://www.aliexpress.com/item/32844017439.html
to it with a construction stud with a nut.
And auto-ventilators are usually placed on the windows in the greenhouse, a stick that, depending on the temperature inside, slightly opens the window.
https://www.aliexpress.com/item/1005001423394550.html
$1300 for two windows.

Answer 2

Do analog.
https://darxton.ru/catalog_item/shagovyy-dvigatel-...
https://darxton.ru/catalog_item/dm542e-leadshine-n...
Construction stud + nut + 2 limit switches.
Well, cook everything yourself on the basis of let's say a corner 63x63x5

Answer 3

do you have a swing door? easy - a series of blocks (can be found in furniture fittings, but it’s cheaper to collective farm yourself from the cheapest bearings and print wheels on a 3d printer), through which a twine connected in a ring is stretched, preferably one that does not stretch, fixed on the door and it is also wrapped around the shaft of an ordinary collector engine for a couple of hundred rubles 12v-24v (it will have to be somehow protected from moisture and temperature changes), ideally, the same twine should be connected to the door from below and from the top so that there is no skew. The direction of rotation of the engine determines the order of current supply + - (it changes with a three-position pair switch or two on-off switches), when the door wedges, the twine on the engine block simply scrolls, nothing is damaged.
The whole difficulty is to make it stretched and place the blocks correctly, this problem stems from the lack of rigidity of the whole structure, the cheaper the materials, the more the dimensions will walk and sway, the distances between the blocks will change, which means there will be distortions, you can try to solve the additional tension of the thread with a spring with a block or weight. The method of connecting the twine to the door will also create a problem, if without a semi-wheel, then depending on the opening angle of the door, the tension of the twine also changes, so a counterweight is needed to tension the thread.

Answer 4

And skolhozit guides, a roller, an engine from a washing machine and a couple of limit switches - will it not be cheaper?