Okay, I built my cnc router 6 years ago and it has worked perfectly...until today! So now I have to relearn everything over to troubleshoot. My A axis, slaved to the Y, seems to be dead. I can switch Y and A cables and the gantry runs from whichever side I plug into the Y axis port, so I inclined to look at the electronics. Before I tear into the whole drive wiring I did notice something that might be perfectly normal, but odd. When I go to the diagnostics page and try to reference the Y axis, the numbers don't change for the A axis. Are they supposed to?? Likewise, when I "unslave A from Y and try to reference the A axis...nothing. Seems like it should be moving like the rest do???