3D Printed Parts on an FRC Robot?

[Michael Hill]

I've been toying around with the idea of using 3D printed turret parts. I generated a large (either HTD or GT2) sprocket, put a hole in it and split it into 6 sections. Those six sections get 3D printed and then bolted onto aluminum.

Check out screenshots here (obviously I need a gearbox on the lower section to drive the belt, but that wasn't part of this exercise):
http://imgur.com/a/0ZGUS

I had one of the sections printed up by shapeways with their white, strong & flexible material (the section isn't flexible at all, they only call it that for thin parts). It's really just a nylon I believe. We had 3mm GT3 belt at our shop that seemed to mesh fine with the section, though I am a bit concerned that the printed part seems to be very slightly undersized, so if I stuck 6 of them together, I'm not a fan of how those errors are going to stack up and possibly ratchet my belt.