Second CNC table build, here we go again....

[njhussey]

Ah ok, so why do you need the rail and block on the plate that's moving up and down? Fine adjustment? Surely mounting the torch holder on the bottom of the plate will be enough?

[Davek0974]

Ah ok, so why do you need the rail and block on the plate that's moving up and down? Fine adjustment? Surely mounting the torch holder on the bottom of the plate will be enough?

The second rail/block you mention is the floating head, it only moves a few mm, just enough to trip a switch as the torch probes the metal surface before cutting.

You can't do initial height sensing without one.