Vevor 3020 cnc Autolevelling

[iBeta]

Ok, thanks for all the information.
Think will try the PCI card first, then see (er actually already ordered it with the machine so no choice now). Did wonder how an external motion controller can be 'better' than PP. If the mach3 is giving timing pulses via the parallel port, how can these be improved upon by an addon controller?
If I do end up having to use an external motion controller, can the autolevel signal still be connected directly to the PP? From others, it seems making a reliable pcb is impossible without autolevelling.
On edit:
found this: http://lab.whitequark.org/notes/2014...dden-features/
which has the PP pinouts - 15 is the probe input. It also has a hack to control spindle speed via software.