Dan, over what length are you trying to hold .01" Is that +-.01" or +-.005".
I think that Toymaker's description is correct and you would have to have some sophisticated software to handle that type of variation.
But if you are correct that its a consistant error build up, then almost any control software can compensate. You just have to tweak the travel per step in the control parameters.
Now, IMO with the type of work that you are showing in the picture, I would think that a rolled ball screw will be plenty accurate enough. Especially with 3D woodwork over a long distance, the wood will grow and shrink so much that .01" is not important.
I use that same McMaster ball screw, but my wood parts are usually under 6" in length. I cannot measure that accurate to see any variation. Another option, might be to use this screw on your Y and Z axis, but only put out more money for the longer X axis.
Good luck and keep up posted on your progress.
Trent |