On Thursday 30 March 2017 15:07:41 John Kasunich wrote: > There was a time (in the late 1990's to early 2000's) when LinuxCNC > (EMC back then) had three realtime threads. What we now know as the > base and servo threads, and a third slower thread for the trajectory > planner. Back in the day, computers couldn't necessarily do all the > trajectory planner (and especially kinematics) math quick enough, so > the planner ran at 1/10 the rate and the output was interpolated at > the servo rate. > > The third thread went away in 2004 or so when EMC2 rewrote much of the > motion controller. > > There is no mechanism for detecting unused ini file parameters, so it > is quite possible that no code has actually used the parameters you > mention in more than a decade. > > I'm not in a position to do it, but I wonder how hard it would be to > grep thru the code to see if those parameters are used? If they're > not, they should be deleted from the sample configs. > > John Kasunich
Interesting comment, John K. So I fired up the editor and took both CYCLE_TIME settings in the .ini file out of the ini file for my small mill. On running it, trajectory did not complain, but emcio did, saying it was useing the default timing of .01 seconds, same as the ini file setting. That did not prevent it from running. So I restored that one, but left it commented out in the [TRAJ] section. Based on that, the [TRAJ] section CYCLE_TIME could probably go away. But does changing the one in [EMCIO] actually do anything in the way of optimizing things better when generating motor steps in software? Or conversely in a 5i25 or work-alike card where there is not a base thread? Whomever has kicked those "tires" recently should be able to comment. Adding to the wiki files under EMCIO would also be a nice clarification. > On Wed, Mar 29, 2017, at 05:34 PM, Joe Hildreth wrote: > > It's me again ... :-) > > > > While in the [TRAJ] section of the INI file is see the variable > > CYCLE_TIME = 0.010, but is not mentioned in the INI config > > documents. I am only guessing that this is the polling interval > > time for the trajectory planner but am not sure. Can I add this to > > my list? > > > > Thanks again, sorry to be a pain. > > > > Joe Hildreth > > > > ----- On Mar 29, 2017, at 3:35 PM, Joe Hildreth j...@threerivershospital.com wrote: > > > Hello all, > > > > > > I am going through the INI file of my stepper based Gantry machine > > > and am looking at the [EMCMOT] section. In this section I see two > > > variables: > > > > > > COMM_TIMEOUT = 1.0 > > > COMM_WAIT = 0.010 > > > > > > I am guessing they have something to do with the communication > > > times, but the INI Configuration section of the documentation does > > > not mention these, and I see no reference to them in the core > > > component motion section of the documentation. > > > > > > Can someone explain these to me and maybe add them to the INI > > > config docs? > > > > > > Many thanks for your help, patience and time. > > > > > > Joe Hildreth > > > ------------------------------------------------------------------ > > >------------ Check out the vibrant tech community on one of the > > > world's most engaging tech sites, Slashdot.org! > > > http://sdm.link/slashdot > > > _______________________________________________ > > > Emc-users mailing list > > > Emc-users@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > -------------------------------------------------------------------- > >---------- Check out the vibrant tech community on one of the world's > > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
