The door would move approximately 40cm between its open and closed states, so we calculate: motor speed (in RPM) = / = / ( x ) The lift time for the door depends, again, on the winch size, since a bigger winch with a bigger circumference will wind more rope in a single turn. I wanted the door to take about 20 to 30 seconds to open/close - too fast makes a bird guillotine, and too slow is just too inefficient. However, the more torque that a motor can deliver, the slower its speed (for gearmotors, at least?) when provided with the same amount of power. I used 1cm as the smallest radius I could realistically make the winch, and I would definitely not make a winch bigger than 5cm, so this gave me the minimum and maximum torque that I needed the motor to deliver. radius = 1cm: torque = 0.5 N-m / 80 oz-in.radius = 5cm: torque = 2.5 N-m / 350 oz-in.Torque depends on the size of the winch as well as the applied force: torque = x Įstimates for different winch radii and the amount of torque required from the motor to lift 50N: (ugh, why does the oz-in unit exist?) However, the force applied (weight) isn't what matters here it's the torque needed from the motor that's turning the winch winding up the rope. This converts to approximately 45-50 Newtons (N) of weight. I got 7.8 lbs/3.5kg, which I rounded up to 10 lbs to be safe. ( reference for the physics calculations ) I cut a piece of plywood to the necessary size, attached some length of rope, and weighed them both to estimate how much weight the motor needed to lift. The PA-06-6-180 actuator was selected for its high Ingress Protection rating of IP67M to ensure water protection even while moving.First, determining the kind of motor I needed. Opening and closing the chicken coop’s door did not require much force so an electric actuator with high force ratings was not mandatory. Mike wanted to build a chicken coop door that utilized a water protected solution since the application will be exposed to outdoor environments. This automatic chicken door allows Mike to conveniently give the chickens an opportunity to roam freely during the day while offering sheltered protection during the dark after closing the door. The goal Mike had for his homemade automatic chicken coop door opener was to allow door movement via user control from anywhere in the world at anytime the user wanted. Although this was a working setup, it was inconvenient to carry the big bulky door everyday. Mike’s original chicken coop came with a manual door that needed to be hand carried for opening and closing of the entrance. We will cover the details and products used in Mike’s project to gain a basic understanding on how you can make your very own simple automatic chicken coop door. In this article, our friend and creator of the Wall-E Robot, Mike Senna demonstrates his version of an automated chicken door opener. But most of all, you need to be able to shut the chickens in and let them out of their coop daily, which does require a bit of time and effort. It does come with a set of responsibilities of ensuring they are well-fed, healthy they have access to water, sunlight, ventilation and much more. With that said, rearing chickens at home can be a lot more than just collecting the eggs. Raising chickens at home is becoming more common and accepted for producing local fresh food.
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