I was wondering how accurate peoples X3 conversions have been. Has anybody tried to pocket a circle and go with a DTI to check for roundness, the bump? How would you rate the accuracy of general milling operations? What, in your opinion was the large contributor in any inaccuracies?
Backlash can be a major contribitor, but it can also is effected by tramming and gib trueness and the perpendicular relationship between x & y axis, and rigidity depending on what metal you are machining and even if the tool that your cutting it with is cnc rated, of course this is assuming that your motors are correctly tuned.
But unless you have preloaded ballnuts and are not relying on the backlash compensation software to take up the slack, you will be disapointed in your finding doing the prescribed test.
But, in the case of Phantomcow2, with his percision ballscrews, and his ability to tram his equipment, I predict his results will mirror Phil Burnams with his Tormach.