Yeah, agree. My concern would be a chicken sticking it's head through the gap to take a peek as its closing, and getting stuck.
I think the OP may have mitigation (or at least the possibility to mitigate).
This looks like an open-loop system (eg, the MCU doesn't know where in the swing the motor is), which makes it a bit more difficult. But it looks like they have limit switches.
Not quite sure how it determines the point to go to 100% power, but I assume it's a timing thing. I can't think of a good way to determine the difference between "chicken neck stuck in door" vs "snow / ice preventing door from closing" without some sort of position feedback.
I suppose you could have a timeout -- it gets 3 seconds at high power, and if it hasn't triggered the door close limit switch, it opens completely, then tries again. This would probably be ok, as long as 100% power doesn't decapitate the chicken...
I think the OP may have mitigation (or at least the possibility to mitigate).
This looks like an open-loop system (eg, the MCU doesn't know where in the swing the motor is), which makes it a bit more difficult. But it looks like they have limit switches.
Not quite sure how it determines the point to go to 100% power, but I assume it's a timing thing. I can't think of a good way to determine the difference between "chicken neck stuck in door" vs "snow / ice preventing door from closing" without some sort of position feedback.
I suppose you could have a timeout -- it gets 3 seconds at high power, and if it hasn't triggered the door close limit switch, it opens completely, then tries again. This would probably be ok, as long as 100% power doesn't decapitate the chicken...