This is a custom design for a modular plastic conveyor belt. I started by designing the belt links and sprockets. I went on to design and print the majority of a working conveyor belt that can run via a dc motor or a stepper motor (as shown). It also accepts a Koyo Encoder for tracking motion. After some adjustments it runs smoothly and without problems. Please see the "LEGO converyor" for more details...
The entire print is ABS. The sprockets and belt links were printed in fine resolution. The rest was printed in fast mode.
All of the plastic connects to two 1" 8020 aluminum extrusions. Mine were 10" in length. I used pieces of extra filament to connect the links together. I had to clean out some of the holes with a drill bit. The pieces that attach to the 8020 use the standard 1/4" hardware. The stepper motor, encoder etc use m3 screws (8mm mostly, 1" length for encoder -- didn't test that yet). I used 1/4" d shafts from robotshop. The bearings and other parts came from there too. I can provide more detail on parts if people are interested.