On Mon, Aug 20, 2007 at 03:03:27PM -0600, Ryan Hulsker wrote: > > A question about feed rates. From the quick testing I have just done it > looks like it always tries to apply the feed rate to the XY axes, and > scales the feed rate for the UV to match so that they all reach their > end point at the same time. Unless your feed rate at XY causes the UV > to overrun the max, or any individual axis to overrun its max speed, > then the XY is scaled down until UV are running at their max. Does this > sound correct? Seems like the right thing to do to me.
Yes that's exactly right. The only part you left out is that if only UV moves, the feed rate is in the cartesian UV(W) space. > And I am assuming that the feed rate shown in the Axis display is always > the feed rate for XY, and not some algorithmic combination of XY + UV or > something. Yes (except the case I stated above). > With any luck I will be cutting up some foam tonight. I need to hand > code some g-code so that I can make a table of kerf width at different > feed rates and wire temperatures. I am planning on cutting circles > (cylinders) at different speeds, and then comparing the diameters to > what the commanded diameters where. > > I am assuming that cutter compensation to handle a variable width kerf > depending on feed rate, and applying it to 2 different sets of axes is > not handled by standard g-code? So I am planning on incorporating it > into my g-code generator. You could use cutter compensation but it will probably not do what you want, as it will only adjust XY. About the generating software: if you have geometry that makes the feed rate awkward (like a tiny move in XY and large move in UV), don't forget inverse time feed mode. (It might be saner to use exclusively inverse time mode for foam cutting.) Please keep us updated about your progress with XYUV. (As far as I know, your foam machine is another milestone for EMC2.) Chris ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
