20 May '13, 11pm

Automated cat feeder and large plastic screws

This isn’t [Mathieu]‘s first automatic cat feeder; an earlier version used a wheel to dispense cat food in excessively large version. To improve upon his first build, [Mathiu] decided to use an Archimedean screw to dispense food in 5 gram increments. There was a problem, though: a proper industrial screw cost about $1500 and the ‘consumer’ versions of what he wanted were trash. He though about casting one in epoxy but didn’t want to poison his cat with strange chemicals. He ended up using PolyMorph for his screw , a plastic that melts at 60º C and is also used in medical devices

Full article: http://hackaday.com/2013/05/20/automated-cat-feeder-and-l...

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