Craig,
Thank you for your excellent information. Now I understand why you were suggesting 2 ports ... once you have 4 axis, home switches, limit switches e switch ect. you run out port pins. So, being a newbie, I focused on what I needed to do to get up and running and not what I inevitable would like to have down the road. So, you are giving me some foresight I did not have.
I am currently trying to digest the rest of the information you have given me. It is kid of like drinking from a fire hose. The G450 looks like an easy to wire device. Not sure about what to use for a power supply. look like 150 to 200W peak.. Shoul I salvage the spindle vfd that comes with the Chinese unit or replace that too? Get a new enclosure? Lots to consider.
Off to ratiocinate on all of this.. I shall return after I can form more reasoned questions.
Thank again,
Jim