Originally Posted by
mmurray70
My resolution is very good, at 121,920 counts per inch. So this works out to less then 0.0001 variation, but it doesnt take much to see a change in surface finish. And its amazing how much we can see and feel. For example, feeding a half inch endmill at 0.005" per tooth leaves a nice finish on aluminum, but you can still clearly see and feel every flute mark. And this would work out to a difference of only 0.000013 peak to valley between teeth!
I will try lower gains in the deadband area and take a look at AntiServoDither__ALL.c but I think ill be safe enough to just switch it out with spindle on and off by the sounds of it. I cant wait to try another aluminum job now and see if it actually makes a difference.
See attached pics for what i am talking about. You can see the cut across the bottom is super smooth (X only) and has a slight pattern when cutting the angle on the side. The pattern i am seeing seems to match the frequency in the step response graph too. Its more noticeable in person, but you can still see it a little in picture.