when I initially start Mach3 and X home or Z home limit is made (2 axis machine), both mist and flood coolant comes on??

Quin

Hi Quin,

It is usual to have Mach turn off all outputs (as a safety precaution) when a stop is encountered. Perhaps changing the active state (High / Low) of the outputs you use for these functions may be the way forward (reconfiguring the logic switching of the connected devices).

Tweakie.

Thanks Tweakie,

Further details on the problem:

I load Mach3.  If either X home or Z home limit is active, the flood and mist are energized after about a 2 sec delay.  They can only be turned off by moving the X or Z on to the overtravel limit.  When I come off the overtravel, they come back on. when I come off either home limit they stop.  If I cycle the overtravel a couple of times, the problem clears and I can run a program normally with out further problem.

If I shut down Mach3 and restart,  the problem returns.

Is this possibly a known bug in Mach3?

I think you may have the coolant setup with the same ports/ pins as the limits or homes. Check your config.

Just a thought(;-) TP