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DC motor for chicken door (feather & featherwing)
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

DC motor for chicken door (feather & featherwing)

by PuaNow on Sat Jun 20, 2020 4:48 pm

I am trying to build a pulley based motor to lift and close my chickens door daily.

I found this project which is very similar: https://www.backyardchickens.com/articl ... ode.74113/

I would like to use one of the Feathers I have and this: https://www.adafruit.com/product/2927

I am having trouble figuring out how to size a stepper motor or servo to lift the 5-7 lbs door.

Any help would be appreciated!

PuaNow
 
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Joined: Fri Mar 22, 2013 7:00 pm

Re: DC motor for chicken door (feather & featherwing)

by adafruit_support_bill on Sat Jun 20, 2020 5:11 pm

I'd probably go for a geared DC motor rather than a stepper. Motors typically have a torque rating in oz-inches or newton-cm. If you have 7 pound door (112oz) and a pulley with a 1" radius, you would need a motor rated for at least 112 oz-inches to lift it. In practice, you will want to go with 2-3 times that to handle the additional torque needed for acceleration.

adafruit_support_bill
 
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Re: DC motor for chicken door (feather & featherwing)

by PuaNow on Sat Jun 20, 2020 5:16 pm

thats super helpful, thank you wonderful person!

PuaNow
 
Posts: 6
Joined: Fri Mar 22, 2013 7:00 pm

Re: DC motor for chicken door (feather & featherwing)

by PuaNow on Sat Jun 20, 2020 5:22 pm


PuaNow
 
Posts: 6
Joined: Fri Mar 22, 2013 7:00 pm

Re: DC motor for chicken door (feather & featherwing)

by PuaNow on Wed Aug 12, 2020 9:56 pm

Do you all think I could control a linear actuator with this:

DC Motor + Stepper FeatherWing Add-on For All Feather Boards: https://www.adafruit.com/product/2927

https://www.amazon.com/gp/product/B07X8 ... UTF8&psc=1

PuaNow
 
Posts: 6
Joined: Fri Mar 22, 2013 7:00 pm

Re: DC motor for chicken door (feather & featherwing)

by adafruit_support_bill on Thu Aug 13, 2020 5:49 am

per haps this one! https://www.amazon.com/Torque-Turbo-Gea ... 0I4E7?th=1

I don't see any torque rating for that. Pololu has a good selection of gearmotors with proper specs here: https://www.pololu.com/category/51/polo ... gearmotors

Do you all think I could control a linear actuator with this:

DC Motor + Stepper FeatherWing Add-on For All Feather Boards: https://www.adafruit.com/product/2927

https://www.amazon.com/gp/product/B07X8 ... UTF8&psc=1

No. That motor has a current draw of 3A. The motor wing can only handle 1.2A. You would need something like this driver for that: https://www.adafruit.com/product/3190

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Please be positive and constructive with your questions and comments.