Dan,
With fancy software like Camsoft's cnc (only one I am familiar with), it is possible to "map" the errors at various positions on the screw. This requires some kind of independent assay of the screw's performance in actual use.
If the screw has a few thou backlash, I wouldn't waste a lot of effort on mapping it, because the table will still float by the backlash amount anyways. The only way to combat this float, is to counterbalance or otherwise preload the table in one direction so that it always stays against the one side of the nut.
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |