I want to make a device that can open a door from a cabinet. The door is about 4 meters wide and about 0.5 meters high. (if the width causes a problem I can split it in 1 meters section with one motor each, or keep it as one section with 1 motor on each side).
When the door is closed it is vertically. When the door opens, it is rotated upwards, meaning the door will be along the ceiling of the room.
For what I found out/read about it, I think a gear motor is the easiest/cheapest solution.
The door will be made of 4mm MDF wood, so reasonably light (I have to buy it), I assume it will be less than 5 kg (causing a pressure of 50N).
I have some questions:
I was thinking of using a gear motor (DC, around 12 V or so), and connecting the shaft directly to the door, meaning I need only a quarter of a rotation to open/close it. Is this realistic? I need low speed, like a door movement speed of 10 cm/s would be ok.
Can someone Check my torque calculation. For what I can find so far it is according to this website: torque t = rF sin X = 0.5 (m) * 50 (N) * sin(90) = 25 N.m = 2.5 kg.m ... is this correct?
I'm intending to use a small microcontroller to check switches on each end to stop the motor (with a relay) when it is fully opened or closed. I assume this is a legitimate/normal construction?