Question Tool Length Sensor

Yesterday I had the pleasure of playing with industrial Shopbot router and part of the set-up procedure you have to set the Z by connecting a metal plate and crock clip to the spindle. The Shopbot post processor then automatically moved the Z until it was set - easy and accurate. Additionally the software also controlled spindle starting and shut-down making it very safe to use.

My question is can this done on the Stepcraft using UCCNC software?

Incidentally I machined my first jobs, although I'm not sure I should post them here!

At first,
I use Mach3 because UCCNC did not offer any test licence (for working on the machine) where I can test such things.

But as far as I know you can program macros like M31 to set Z-zero.

Look on internet and you will find some macros .