Hey guys.

So i am a CNC noob, but i have been doing my home work.

I have spent the last months reading up on G-code, Mach3 & spent about 3 years learning CAD.

So i managed to draw somthing up, convert it to G code and sucessfully simulate a machining in Mach3 perfect...

So i'm almost set.

The question i have is this:

I want to make a part that requires machining on BOTH sides, and i am using a 3axis moving gantry miller.

How do you guys machine both sides(obviously i have to turn the part by hand) but how do you make sure the machine can mill it 100% accurately since when you take the part out and flip it, its damnned near impossible to get it in the EXACT same position again (especially when tollerances are so tight on CNC) within just a few 0.1's of a MM?

I hope i have put my question out properly.

Thanks

Craig