On Sunday 24 February 2013 03:37:49 Todd Zuercher did opine: > How far off is it? High low what? Are you certain of your screw > pitches? > > ----- Original Message ----- > I have just switch my mill over from linear scales to rotary encoders > and I can't get my input scale right. OUTPUT_SCALE is 1, Units-inch > > X axis has a 1250 CPR differential encoder, motor 14 tooth gear, screw > 21 tooth gear, .200 pitch screw. 1250 X 4 X 1.5 X 5 = INPUT_SCALE = > 37500 > > Y axis 5000 CPR differential encoders, motor 14 tooth gear, screw 21 > tooth gear, .200 pitch screw. 5000 X 4 X 1.5 X 5 = INPUT_SCALE = 150000 > > Z axis 5000 CPR differential encoders, motor 14 tooth gear, screw 28 > tooth gear, .200 pitch screw. 5000 X 4 X 2 X 5 = INPUT_SCALE = 200000 > > If these calculations are correct they don't work, to even be in the > ballpark of one inch of actual travel (+/- .020) equaling the DRO > showing one inch I need. X axis INPUT_SCALE =38500 > Y axis INPUT_SCALE =750000 > Z axis INPUT_SCALE =1000000 > > What am I missing here. > > Your help is greatly appreciated, > Bruce
I don't see the drivers current microstepping ratio in any of the above. Or is that the 4 in every example above? Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> "There is nothing new under the sun, but there are lots of old things we don't know yet." -- Ambrose Bierce I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
