Hi, Sorry to come back in the discussion : I first posted my question on the forum and I was suggested to come here to ask my initial question. I know this is a devel mailing list, and that I may not have my place here ( direct translation from french to english, don't know if it sounds right ) Since you are talking about the "user", I am what we could call a dumb user ;-) I think the linuxcnc website lacks a "CNC for the newbies" page that would explain a few things with simple words. If I consider my own example, even though I read your discussions for a few months, even though I am a linux user for about 10 years and even though I really enjoy computers, I must admit that I still don't get some simple things about how all this software and hardware work together. - What is a stepper motor or a servo ? In french, a "moteur" can be a stepper motor, a handrill motor, or even a car engine. Those are quite different things. - What are these pulses you are talking about ? - Why the pulses need to have a good speed and "rythm" ? - Why does Linuxcnc need a realtime kernel, while Mach3 can run on a stock Windows install ? - What is the difference between software stepgen and hardware stepgen ? - Is one better than the other ? And so on ... I think that I found my own answers on some of these questions, but I am still in a "blury fog" about it. I know that some of the answers can be found here and there on the web, or on the Linuxcnc website. Linuxcnc already has a lot of documentation on the wiki, but Linuxcnc is so powerful and has so much capabilities that a lot of this documentation is like chinese for the newbie. Maybe a tagging the pages with "easy", "intermediate", "advanced" might help.
Please don't misunderstand my words : there is no critics or complaining here. ( English is not my native language, so I may not have formulated my thoughts the right way ). But since you are talking about the user, this is simply the point of view of a "dumb user", that don't have a clear overview of how all these complex lego things work together. I started using a CNC 2 years ago, milling pieces of wood several times a week, and I must admit that I am a bit frustrated that I still don't really understand how all this work together. I know this is not your problem : you are already doing so much. Thanks for amazing work ! Christophe ---------- Christophe Grellier Guitares acoustiques 8 rue de Rouans - 44680 Chéméré Tél. 02.40.64.17.96 www.grellier.fr <http://www.grellier.fr> Le 06/05/2013 21:00, andy pugh a écrit : > On 6 May 2013 19:48, Michael Haberler <mai...@mah.priv.at> wrote: > >> in the case of latency, I am rather sure this is the case, which is why I >> suggested to think outside the box > Typically we set base period == latency test result. Which is clearly bogus. > 2x or 3x latency test result has also been suggested. > > I doubt that in general the jitter leads to significant path > deviation, as it can (as far as I can see) only ever be a single step > wrong. > ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
