-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 3/30/2012 2:28 PM, Viesturs Lācis wrote: > 2012/3/30 Charles Steinkuehler <[email protected]>: >> >> I do real-time on Windows, with no kernel patches! :) > > Please, do not get me wrong, I am not an IT guy by any means, but > I seriously doubt that non-patched windoze can be real-time > (although it depends on the definition of "realtime").
By real-time, I mean the system does everything required without missing any hard real-time deadlines. This is possible for us because of our fairly long timing windows (10 mS to 15 mS) based around video timing, with anything needing fine timing control handled by hardware. This would not really work for LinuxCNC, as the feedback cycle has to happen much faster, and if your process timing jitter becomes a significant portion of the overall feedback cycle period, bad things start to happen! :) > LinuxCNC is about being smart controller on dumb hardware, it is > designed to do all the thinking part of the machine controls so > that hardware does the technical tasks - generate signals, count > incoming pulses etc, but all the intelligence, like closing > feedback loop for servos, all the kinematic calculations etc - that > is done inside LinuxCNC. I understand that, but with FPGA boards available, having to rely on extremely low latency figures for decent software control seems unnecessary. Peter indicated earlier versions of his hardware had support for assisting the software with timing issues, but that LinuxCNC didn't make use of the feature. Maybe I found something I can try to tackle! - -- Charles Steinkuehler [email protected] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEUEARECAAYFAk92DI0ACgkQLywbqEHdNFwLfwCYib3OKQofsdQY+9EHRDQlJJ0U GgCdHoZxRmDpWB3alY9ZHZt9V+JWsbM= =pn7l -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
