Listen, I am sure this has been covered a number of times in different threads, but I wanted to ask the question. We interpolated a 1.002" hole with a .5" diameter 2" loc garr endmill in aluminum. The machine is a 2007 daewoo 3016 with cat 40 taper and fanuc Oi-mb controller. We used a bore gauge to check the diameter of the hole. The hole size tolerance is -0 +.001. The machine had no problem holding that size, but the hole size variation from interpolation is about .00035 to .0004. I assume this could be from a number of things. Possible endmill/toolholder runout, endmill deflection since it is a 2" loc, and/or backlash. If this variation is all from backlash, is .00035-.0004 acceptable or should I try to get it closer?
If I can account for the backlash in the controller, how do I do that? Or is it even needed if .00035 is close enough?
Thanks,
Chris
If I can account for the backlash in the controller, how do I do that? Or is it even needed if .00035 is close enough?
Thanks,
Chris