My automatic dog feeders work great but only hold enough food for a few days so I designed and printed a funneling system and a resovoir to hold the entire bag so all I have to do is fill the resovoir when I get a new bag. Works great.
Edit: don't know why the photo uploaded sideways. Sorry about that.
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Great as long as they don't figure out how to knock the bowl over and eat off of the floor. Went from about 5-10 seconds to around 30-45.
You can't see it in the picture, but I have these braces I printed that holds the bowls in place. They can spin but they don't come out.