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Automatic Window Help
Hi guys,
I am currently in college and have to complete a project. For this project, i have decided to create an automatic window opener, based on internal temperature and rain conditions. The window this will be installed on is a top hinged window and about a metre wide.
After some research of existing methods, i have found this design on thingiverse:
[url]https://www.thingiverse.com/thing:134236[/url]
I really like this idea and would like to base my design on it, however i think that my window will be much more difficult to open than the one in the video, and am worried that the motor won't be powerful enough.
I also want to use a raspberry pi to control the mechanism, and so the motor will need to be compatible with it.
I don't know anything about controlling motors with raspberry pi's, however from research, i have found that i can use a L293D board to control a motor up to 2A.
It would also be preferable if the motor was relatively cheap, as i am paying for it myself.
I have found this motor which i think might be powerful enough on RS Components which i think might work:
[url]https://uk.rs-online.com/web/p/dc-geared-motors/1346440/[/url]
I can also move the mechanism from the hinge side to the opening side, to make it easier to open, as well as using one mechanism on each side.
Therefore, i was wondering if any of you have an advice on what motor i can use, how i could alter the design to make it more powerful, or anything else you might know.
Sorry if this is in the wrong place or the question i am asking is obvious, but i am still in college and quite stuck.
Thanks,
Chris
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Start by looking at the low cost solutions that are on the market: [url]https://www.menards.com/main/doors-windows-millwork/mobile-manufactured-home-parts/mobile-home-exterior-products/roofing-accessories/8-x-16-automatic-foundation-vent/p-1444423378396.htm[/url].
It only has temperature control but get creative on the rain closure by making it automatic as well. Or design it as rain proof from the start with a bottom vented cover.
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To determine the force required of your motor, sum the mass of all components being lifted and apply a frictional force to each contact surface(s) within the mechanism(s).
Apply a factor of safety (FOS) that seems reasonable (1.4?).
[url]https://www.engineersedge.com/analysis/factor-of-safety-review.htm[/url]
When you know the expected axial force applied to the motor, use one of the following equation/calculators to determine the required motor design torque.
[url]https://www.engineersedge.com/calculators/torque_calc.htm[/url]
[url]https://www.engineersedge.com/mechanics_machines/screw_jack_equations_13698.htm[/url]
Don't forget that you could include a torque multiplier or gear reduction design as well.