Second, the problem I have with building from scratch is that I don't have precision tools. I have an old craftsman table saw that MIGHT be able to be calibrated square. But even then, I can only cut perfect 90's on short pieces. If anything's very long, the slop in my miter guage slots and such will prevent square cuts. The fence has been pretty beat up. I think I had it square once, and it might have stayed that way for one cut, but that's it. I have a Skill brand drill press. I can line up a hole on it, but it does have slop in the spindle. I don't know if it is enough to matter when building a CNC
or not. And I can't currently get the table square. I don't have a machinists square, and the various other squares I have aren't perfect enough for me. I'll get a machinists square for setting up the CNC
, but I haven't had to drill anything that takes that precision yet.
Basically, I may be able to upgrade my shop to give me enough precision to build a precision CNC
machine. But that in itself will eat up most of my budget, what with better guages, better fences, etc. So if I build from scratch, I either need a set of plans designed in such a way as to have enough adjustments (basically, everywhere) that I can make up for bad cuts, or reassurance from the community that the cuts aren't as hard as I think they are in the first place.