hi pete i wasnt adressing your comments yeah i agree sink edm 'escapes' not 'reverses'
imo: hole poppers reverse toward the start point sinkers escape to a safe point wedm reverses along the previous path ( usually ) edm grinding , well, i never saw it reverse really not on AGie nor Elox edm grinders thats my experience tomp On 02/26/2016 11:25 PM, Pete_Gruendeman wrote: > Hi Tom:> path reversal is what you do when things are WRONG >> path reversal is not how you move to the correct position. These >> statements are true for wire EDM but not for sinker. There are many reasons >> to back out with sinker, including timed retraction before the erosion gap >> is contaminated or forced retraction after the gap is contaminated. That >> retraction can be along the programmed path but is more often escaping >> toward a fixed point or in a specified direction. Escaping off the program >> path is the essential part, not just backup up and dragging the electrode >> through the contamination bits. > I repeat: This is for sinker, Not wire. > Pete Gruendeman > > > On Friday, February 26, 2016 9:06 AM, TJoseph Powderly > <tjt...@gmail.com> wrote: > > > adaptive feed slows down till the velocity does not overshoot the > removal rate > that aint edm, thats following the slow truck in the slow lane > > reversal aint what edm is about unless things are near fatally bad. > > the normal motion in edm is a jiggly motion that on-the-average moves > towards a destination. > > its jiggly because the correct position varies constantly, > the correct position is forward and backward of the present position > on a micro or miliisecond basis. > > path reversal is in seconds not fractions. > > path reversal is what you do when things are WRONG > path reversal is not how you move to the correct position. > > path reversal is like air bags in a car, > so path reversal is not about good motion control > its fire prevention, > no its the fire department. > it's way after the control system failed. > > > tomp > > > On 02/26/2016 05:56 PM, andy pugh wrote: >> On 26 February 2016 at 07:34, Nicklas Karlsson >> <nicklas.karlsso...@gmail.com> wrote: >>> Anybody familiar with EDM who could tell me how to adjust the feed rate for >>> EDM operations? >> There is a motion.adaptive-feed pin that can control the feed-rate >> according to an input to HAL. You would use this. >> >> You might want to look at the experimental reverse-run branch, which >> allows negative values in the adaptive feed and in that case runs >> backwards through the G-code. >> > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
