GPAGD (General Purpose Automatic Grain Dispenser)

thingiverse

This is a fully automatic general-purpose grain dispenser. It can be used to dispense specific amounts of granular material such as pet food, coffee, sugar, fertilizer, sand or anything else you'd like. Update 13 Jun 2018: - A leg structure has been added to lift the base off the ground - A nozzle part has been added (this part is a bit tricky to print and needs support due to extreme overhangs) - A container with two options has been added. It can be used with a lid or four extenders that hold the plastic bag of material. Note: Currently experiencing issues with the steady flow of material from the container to the machine (testing with pet food which is irregularly shaped and gets stuck in the container hole). Maybe adding a servo with an arm that makes a sweep when needed will assist the flow and solve the problem. Features: - Powered by a NEMA 17 stepper motor - Dedicated electronics enclosure at the front for easy access - A cable channel runs from the front to the back, keeping your wires clean and hidden - Easy to print and assemble BOM: - 1x NEMA 17 stepper motor - 1x microcontroller (Arduino or similar) - 1x stepper motor driver - 1x female DC power plug connector 8mm OD - Wires - 1x 12VDC power supply (2A or higher) - 9x screws M4 x 20 for the main body subassembly and the motor mount connection with the main body - 4x machine screws M3 x 8 to secure the motor to the motor mount - 2x machine screws M4 x 6 for the power cord mount - 6x machine screws M4 x 20 for the leg structure and the nozzle - 1x small container of superglue to secure the two auger parts together as well as the container and the container base This design is in the testing phase, so all information provided here may be subject to change. However, you can print it and build it, and it works fine. Feel free to comment on any suggestions or flaws. <iframe width="560" height="315" src="https://www.youtube.com/embed/tQ4YM9L0FXw" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe> <iframe width="560" height="315" src="https://www.youtube.com/embed/mPSImfWtN3k" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>