I am not throwing out the possibility of a z axis. Having one in the future would indeed make the device more useful. My main concern was cost. I have seen several plans for smaller machines that were quite well done. My interest is in getting something that can do a 4'x8' sheet of plywood and not break the bank in the process. At this point I'm just going through the mental exercise.
I like the idea of chain drive. I would be concerned with supporting the drive rod over a long distance. THe chain idea takes that out of the equation. |