I have been *very* sporadically working on a camtech 4 x 8 router rebuild. it was 95% done 6 years ago and has at times been 100% done and cutting. However, never for long.

UCCNC software has been fine (with Ger21 screenset), but I have been having issues with CNC4pc breakout boards. I have stuck with C35S as my CNC4pc board of choice..... for better or for worse.

Last I left the machine I had one of the Y drives (dual rack and pinion for the Y so reverse slave direction) stop getting step signals. Having recreated that setup it was the Y axis that wasn't stepping, the A slave was working only.

So, having tried to trouble shoot, I ordered some new boards, plural so as to have a backup if problems later. New boards were Rev2 versus Rev1.2 but relatively easy to swap out wiring due to most of it is via RJ45 connections.

For the new boards the Y worked again as well as nearly everything else (limits, spindle on off and speed control, etc).....but Z only wanted to go up. Would not change direction for anything, that signal just wasn't getting to the board. Swap the X and Z and Z works fine and X is one-way. Swap the C35s board with the spare, exact same issue. Swap the Rev2 board with the Rev 1.2 board, Z (and the Pin 7 direction for Z) work fine but there is the Y problem.
Suffice to say, the UC100 seems to be able to use pin 7, the ribbon cable seems to be OK, and the cables to the drives and the drives seem ok which leaves only the board. The weird part is that BOTH boards didn't work in exactly the same way and both are brand new.

Further and finally, as a backup's backup, I also bought a C88 board from CNC4pc to split the Y output from something that worked...and it doesn't move anything with either the Rev1.2 (hooked up to the A axis) or the Rev2 (hooked up to Y). I figured I could use A to control Z if the C88 worked.....a kludge but something.

I know a lot of people use CNC4PC but my experience isn't so great. And, given it's 6 years later, I am thinking of just ditching all of the above and moving to the acorn system by Centroid as my bother ran a Centroid control for years and liked the service and robustness.

Thoughts? Troubleshooting tips? (yes I have a ticket in with CNC4PC). I like UCCNC and I like the RJ45 connections, but if I move to ethernet I will probably just try Centroid.