Yet another gantry CNC router.

[Clive S]

There is not a lot of point in my opinion of having any limit switch on the bottom of the Z axis as you always have different length tools in the collet etc (so how can you set it) . Also if any limit is tripped the machine should be set up to stop all action on all axis as you will have lost position. ..Clive

[cambesol]

Absolutely agree. Now that I have seen the affect of two axis still running. Problem with using the enable line is that it fails very quietly. I only figured the problem out because the z-axis status LED on the stepper drive was solid and the other two blinking (status enabled and ok). I blew all the cr@p off the limit switch and all three LEDs started flashing. I had lost z position and tried to save the job but forgot to home the z again (after clearing the fault). Suffice to say it all ended badly.