On Nov 10, 2009, at 3:27 PM, John Thornton wrote: > What you need to figure out is how far the axis moves per rotation. > For example if your > motor turns 4 times to turn the big pulley once and the table > travels 2 inches then it is 2 > turns per inch. If it is 200 pulses per revolution and 10 microsteps > then you have > 200 x 10 x 2 steps per inch. At the bottom of the page you can see > the scale calculate as > you enter in values. The only value that really matters is the > actual scale number.
Thanks John, If I am using a servo with 512 PPR, is a step 1/512 of a revolution? I guess I do not know how step/microsteps apply to servos... Is it possible with EMC to command the servo to move 1 revolution (or a specific number of steps) instead of specifying a distance? > I have belt drive plasma cutter and the calculations don't quite > come out exact with the belt. > It depends on how much belt stretch you have. Once you get it close > take a measurement > and the move a large amount then measure. Do the math to figure out > the exact scale you > need to get a movement of one unit. For example one of my axis > calculated scale is 4000 > but because of belt stretch I need 3980 to get a more accurate > movement. That makes sense! Thanks again, Jeshua Lacock Founder/Programmer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
