Re: Is it cheeper to build
You need to define ''high precision'' and CNC machine. That term seems to mean different things to different people. For some it might mean +/- 0.010 inch, for others it might mean +/- 0.0001 inch or better. Are we discussing metal (CNC milling machine) or wood (CNC router) machining? For the most part they are not interchangeable, however wood work can be done on a milling machine, but metal work is not so good on a router.
My choice would normally be a used machine that is in good mechanical shape, maybe with a dead computer/controls which many would concider to be a boat anchor and can be bought for scrap price.
Jim Dawson
Sandy, Oregon, USA