I have searched long on every 3D model sight I could find. I couldn't find a good solution to my problem. Every one I saw was either too complicated or too expensive. Simple ones I could find used a rotating screw to push out food, but that would cause jams a lot with different size foods. Mine uses a rotating tpu blade so that it doesn’t jam and works with any size of food! I wanted a cheap, easy to make printable model. This pet feeder uses a few electronic components and some 3D printed parts. You add pet food to a wide-mouth mason jar and screw it onto the base. I used an amazon smart plug to turn the system on and then off once it's done. This is a completely free model and you can feel free to build off of it! Every part except for the blades should be printed out of PLA or PETG, but the blades should be printing out of TPU with low infill (7%). I have the full instructions for this build down below along with the code. The only thing that needs supports is the chute, on the lower part of the outlet. Happy printing! :) 

Here are the non-printed parts:

1. Nema 17 Stepper Motor https://www.amazon.com/dp/B097JKJ9VV/ref=twister_B0D49CR3GQ?_encoding=UTF8&th=1
2. Adafruit Motor Shield V2 https://www.adafruit.com/product/1438
3. Arduino Uno https://www.amazon.com/Arduino-A000066-ARDUINO-UNO-R3/dp/B008GRTSV6/ref=sr_1_3?crid=2L50BUAKDMDXC&dib=eyJ2IjoiMSJ9.MazmhFfn-DF8W5oyX_S-tDFAqLRDaMJSkroaZhdQMdgGxJujWYy51xVRihYRF1ezOAN3IZUsQe21OTeMfxJrCC0g7xfwc1s26bDDe-fNkKcXNG0d04w_xH2v8YwlFdqf5-v_iYjpxYYnTt566u1tZ3Q6iIPdEgKW7fWJqjZ7xpd_-VFSuud_ahfM7H9xQ6vKWhOIHU67pbmJcYZExErPn3jCgTBuUBKsZxQ-RbMtO2wj3K05c3TDvUu_3ZNFem4lP0atQMQj6eUqQWjbJaDPAq5x1mFiu385_1VY1uRwM5yZvfIYCkoP7dlmGLBDf_EpnL9q9L3hVr1XYGXGtgJwV6gTWzFJq_RqlGauvYblX6s.vfQ4MBJ5-C2xr8mKcHErnFTvHXbpi-YhtmKSGPU_iVk&dib_tag=se&keywords=Arduino+uno&qid=1737568635&s=industrial&sprefix=arduino+uno%2Cindustrial%2C176&sr=1-3