WeldingRod Bot: Exactly Constrained 3D Printer

A 3D printer based on the Cobblebot kit or OpenBuilds parts that is not over-constrained - smooth motion with minimal adjustment.

I'm printing now!

*** The name Cobblebot is the property of Cobblebot Inc. This work uses the kit of parts provided by them for a "Basic", but is radically different from their design. ***

I'm working on a modified build for the Cobblebot or OpenBuilds parts that will get it closer to an exactly constrained system (and much less sensitive to rail alignment). The target is a 15" cube build volume. Please note that there are both English and Metric versions of most of these drawings. If you get them plasma cut, use 1/8" steel; it cuts REALLY well. If you get them laser or waterjet cut, use whatever you want. They 3d print acceptably, but the end result is kind of floppy; I don't recommend it, but I did try it during my (many) rounds of testing.

Actual motion range:
X: 16" (which means that I can get BOTH heads to move over a 15.2"