I'm gathering materials for my CNC router build and had a question about using plastics instead of plywood. The plans call for 3/4" 13 ply birch plywood that I understand is a very stable building material with no voids between the layers.
We've been playing around with some 3/4" gray PVC sheet material at work to make fixtures for fabrication and thought it looked stiff and strong enough to use for my router build. The full cutting area of this router is only about 28x16x5 so there would be very little sag factor.
I believe this stuff can be tapped and would hold a screw in the threads. Also, the plans call for PTFE supports for the head assembly with aluminum plate pieces for the Z axis. I was thinking about building the whole thing out of this gray PVC material.
Anyway, I was wondering if anybody has played with that material or suggest an aluminum replacement for the Z axis as aluminum is a bit harder to drill, tap, etc. and costs more.
Thanks in advance for your reply