My question is this-
What is considered good tolerance? I'm starting a part time shop and am looking for a used CNC machining center to start out with. I have been a designer for quite some time and have been learning programming on the side. I have found a few CNC centers such as the Fada;'s and Haas, but can't decide as to what is "normal" for a used machine. How tight does a machine need to be, and what would be considered "bad"? +-.005? +-.002? In my field our design tol. are +-.05 MM in some instances. I am aware how tight this is, but is this resonable for a machine...say 1994? I doubt I'll be working anywhere near this tight, but if the job comes up.......
Any help would be apreciated. Thanks