This design is a pellet dispenser using an endless screw powered with a Nema 23 stepper motor. I use it to slowly feed pellets. All parts print easily without support except the endless screw witch also requires PLA tough, ABS other high strength materials. The screw in positioned in the main body using two 608RS ball bearings. The belt is printed in TPU 64D. The cover is designed for a 80.5mm laser cut acrylic sheet.

To see the dispenser in function look at the following video:
https://youtu.be/i4x5mJ59DhI