On 24 February 2013 01:40, Bruce Klawiter <bmkl...@yahoo.com> wrote: > 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 > My arithmetic may be way off, but I don't understand any of the above. Where does 1.5 and 4 and 5 come into it? The way I see it, 1250 counts = 1 motor rev = 14/21 x 0.2 = 0.13333333 in therefore, 1 count = 0.133333 /1250 = 0.000106666 in or, 1 inch = 9375 counts. You should in any case, be able to jog the motor for 10 inches linear travel and get a ballpark figure. Then /10 and you'll know 95% of what you're aiming for. Roland > > 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 > > ------------------------------------------------------------------------------ > 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 > ------------------------------------------------------------------------------ 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
