i am thinking about a mill drill (square column) cnc conversion, my question is why would i want to spend an extra $500 on ballscrews? accuracy? speed?
And another thing, linear rails, it has less friction so wouldnt it be easier to pick up slack on backlash making climb milling imposssible and negating all the good effects of having a heavier table?
the table on linear rails would be easier to move within the range of backlash so this would lead me to buy ballscrews in the first place.