Hi Len Am 08.12.2010 00:17, schrieb Len Shelton: > I have a customer trying to set up EMC2 with a rotary axis such that he > can carve on the surface as if its a plane wrapped around the > circumference of the work piece and has coordinated motion such that he > can get a constant surface speed. Because the rotary axis is set up in > degrees, he cannot get the feed rates to match. I other words, if he > programs F100, the rotary axis is dog slow, and if he programs F500, the > linear axis moves way too fast. As far as I know you cannot have two F > parameters on one line of g-code. > > I am sure this has to be something simple, but I just don't know what. > > I could see where you could configure the rotary axis as if it were a > linear axis, but you'd have to reconfigure that axis and restart emc2 > every time you changed stock to a different diameter.
For getting the correct feed rates you have to calculate the surface speed. This needs the diameter of the work piece. This also sets the size (limits) of "working plane". I would try to set up the rotary part this way: * create a multiplication block between commanded position and your position loop * try to set the multiplication factor either by the programmed D/A pins of emc (M62-M65, motion.digital-out) * or use a (uvw) axis as "adjustment axis" to set the factor as diameter. * maybe use some hal calculations to set the axis limits. This way you could set the diameter within the nc program. the zero position would be fix, but the axis position would change according to the mult.-factor. bye Ulf --------------------------------------- Ulf Dambacher [email protected] --------------------------------------- ------------------------------------------------------------------------------ What happens now with your Lotus Notes apps - do you make another costly upgrade, or settle for being marooned without product support? Time to move off Lotus Notes and onto the cloud with Force.com, apps are easier to build, use, and manage than apps on traditional platforms. Sign up for the Lotus Notes Migration Kit to learn more. http://p.sf.net/sfu/salesforce-d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
