Automatic Fish Feeder

thingiverse

Important Notes: I designed the auger's fit within the barrel to have very tight tolerances, expecting a more consistent feed as a result. However, after a week of using it, the oils in the food started building up in the barrel and caused the auger to bind. If you plan to print this design, hold off until I can rework the auger to allow for a bit more room for it to turn within the barrel. Automatic fish feeder remixed from coberdas and UrbanAtWork. Everything was designed in Fusion360. You can access the design here: (http://a360.co/2BmqVjW). It is centered around a Nema17 stepper motor. I used this one (https://www.automationtechnologiesinc.com/products-page/nema-17/nema17-stepper-motor-2/). IMPORTANT!!! The lid and standoffs may load into your slicer in a vertical position, but they print better when rotated into a horizontal position, which I highly recommend. The hopper may also load lying on its side; rotate it so that the small end is at the bottom. Some of the parts are intentionally designed to fit snugly; wiggle them around or rotate them in the case of the auger to loosen them up a bit. The motor attaches with M3 35mm socket head cap screws (mcmaster part#91292A033). The motor shaft attaches to the auger with an M3 set screw (McMaster part# 92605A100), but any M3 screw will work as long as it doesn't extend out to the spacers. There is a slot in the motor shaft end of the auger that you can slip an M3 hex nut (McMaster part# 90710A030) into.