Hi Rob, On Mittwoch, 1. April 2020, 05:42:08 CEST Rod Webster wrote: > I'm a bit confused by Reinhard's views. > We spent a fair bit of time working though this with plasma machines (where > knowing the commanded velocity is critical) and I don't recall seeing an > instance where commanded velocity was exceeded. BUt that was a while ago
Well, the testcase came from Chris and it is the file 3D_chips.ngc modified so that some lines contain different f-words. That file takes long motion time, so discrepancy between readahead and real motion comes to light. I added a F-word with a slow value (like F100) to the beginning and a faster one (like F400) to the end. Without changing the feed overwrite, the machine starts to run with F400 as feed limit - which is aparently wrong. I run linuxcnc with axis (to have visual feedback about motions) and my app as a status browser, which shows the actual feed rate from status feedback channel. Status feedback reflects accelerating and decelerating ... ... so its pretty obvious, that the feed values come from motion and not from interpreter. cheers Reinhard _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
