Is anyone else experiencing loss of home position. After I reference Mach 4, then establish my work offset. Mach 4 will flake out more often than not lately and lose its home position. So when I run a part program. The machine will tell me some axis is over its travel limit if it makes that move. Then I have to re home the machine and go through the process of reestablishing my work offsets again. After doing this a second time the machine usually doesn't give me a problem and I can run my part after that, but you can see that If I have to do this every time I run my machine it gets pretty old real fast.

One thing that can cause similar strange behavior is a limit switch that false triggers from vibration. Some G-code files might be setting up a resonance whereas others do not.

I don't have limit switches installed yet. I am referencing to a known position that I setup when i shut the machine down. So when I start it up and press reference all it zeroes where it is, then turns on the soft limits so I can't over travel.

in mach you can see the "yellow box" with soft limit and the tool path ,so you can see if yours origin is "move"
i think also its tell you which line is the problem so you can understand which axiss make that
do you use G54 or working only by machine origin?