Ken,
It's just takes some time and there are no shortcuts. Very difficult to sit down and read 150 page manual and expect to understand it.
Every thing is so interelated and as such it's extremely difficult to have a manaul written that keeps the thought train on track for a particular
item. CNC is certainly not plug and play. Mach is so configurable.
Sometimes trying to answer a question is like pulling a tooth, eventualy it comes out but can be a little painfull on the way.
You get stuck on something post and someone in here will be able to answer the question.
Heck, in time you'll be gumming it just like the rest of us!

BTW, I am not even sure where or if the axis calibration via the Settings TAB is covered in the manuals.......and i was too lazy to look for it.

RICH