This is a remix of the excellent design of Ralf’s Perstaltic pump. I printed his pump and built it to his specs, but I found that the small stepper motors would not really run the pump consistently or with enough power.
I decided to modify the pump to accept a Nema 17 stepper. This gives the pump PLENTY of power to push whatever liquid that you’re trying to push. I had to beef up the bearing holders a bit. I also added some mounts. There’s a single pump mount and a 4 pump mount. (I’m using to add fertilizers to my aquarium, so I use the 4 pump version).
download the files on: http://www.thingiverse.com/thing:1134817
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