Need suggestions on troubleshooting My Z-Axis randomly losing its height. I have cut this file 3 times and it has changed depth all 3 times, but in different places and to different depths. Since it is doing it in different places, that tells me its not the g-code causing it. The only thing that seems to be in common is that it is happening after running for several hours. This file takes 7 hours to run on my machine. For the first 4-6 hours or so....it runs perfectly. X & Y Axis's are dead on.



I am running a Gecko G540, 48v power supply, 420oz steppers, Super PID, Mach3