Wasn't really planning on doing this but I got bored trying to figure out my vfd so threw a DTI on inside spindle taper. .0005" TIR.
Next I put a precision ground rod 1/2" and got .00075" TIR. Made a mark of the high spot and then dropped the table 3.5".
The high spot moved .001". I was getting .002" high of zero and .001 low of zero so .003" TIR at 3.5".
Oh, and after dropping the table I raised it just a little to take the backlash or whatever it is out.
I'd like to know if anyone did some tests on theirs and how it turned out.
Next I put a precision ground rod 1/2" and got .00075" TIR. Made a mark of the high spot and then dropped the table 3.5".
The high spot moved .001". I was getting .002" high of zero and .001 low of zero so .003" TIR at 3.5".
Oh, and after dropping the table I raised it just a little to take the backlash or whatever it is out.
I'd like to know if anyone did some tests on theirs and how it turned out.