electrictermite wrote:That was the answer I was looking for is just jog down Z to new surface and reset Z to zero before running finishing gcode.
I hope I don't add more to your confusion, and I realize this is your first 3D... but you must use a little common sense with ALL of these CNC projects. As others stated several times, you use the SAME Z level for the finish as you did on the rough. DO NOT change the X Y... they are set for the boundaries of the rough of course. Simply change the tool for the finish... jog to the spot you zero'd the rough tool. Zero it and plug away.
One thing I have to admit when I was starting with 3D and learning... be sure to watch the tutorials over and over... to get the total concept. Because every machine is different for toolpaths and settings, I would suggest to work with a 3D project that is already made, such as one of the free monthly projects. Dissect it and change every toolpath to settings for your machine. Some of those settings in the rough are very important to get right; otherwise you could put unnecessary strain and abuse on your machine if enough material is not removed for the finish. I hope some of this helps. Good luck! Make sawdust! lol.