no, axis3 does not home. it is a rotary axis and from experience, i decided that a home switch was not needed for the moment. the no_force_home=1 line in the .ini file trajectory section fixes the problem, but it was not intuitive that an axis not included in a homing sequence would be required to home anyway. the config files are identical to the stepper configuration wizard's output. the first try was to comment out the home position and offset lines for that axis, but that had no effect. anyway, that problem solved by no force home. the three linear axes still home correctly. the next hurdle is to figure out the relationship between the steplen, stepspace, dirhold, and dirsetup. they have vastly different values in the hal.ini, and from watching the motors move, it looks like the direction signal is not always properly applied - the z motor intermittently goes the wrong direction during a g1 move. un fortunately, i'm stuck for the time being with a tb6560 based stepper driver board, which i've since read is something to be avoided. ~getting what i paid for/could afford
--- On Mon, 8/8/11, Stuart Stevenson <stus...@gmail.com> wrote: From: Stuart Stevenson <stus...@gmail.com> Subject: Re: [Emc-users] dedication To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Date: Monday, August 8, 2011, 10:24 PM Charles, Does the EMC2 screen show axis3 is homed? If not then you have not homed the machine completely. You will continue to get the message until axis3 is homed. EMC2 requires all configured axes to be homed prior to running. Have you posted your configuration files? If not, would you please do so. This will enable a much more precise conversation. If you will upload your files to a public website (yours or somewhere else) and post a link to the configuration file then the configuration can be looked at by many people and the correct configuration can be determined. There will likely be more questions as more information is made available but that is part of the process. thanks Stuart On Mon, Aug 8, 2011 at 10:44 PM, charles green <xxzzb...@yahoo.com> wrote: > the exact message is, "Can't issue MDI command when not homed." AXIS > EMC2.4.6 on Ubuntu 8.04. the homing sequence is axis2=0, axis0=1, axis1=2. > axis3 is not included in the home sequence and has no pins assigned to > homing switch in the hal ini. the configuration is a mill xyza millimeter. > > --- On Mon, 8/8/11, Kent A. Reed <knbr...@erols.com> wrote: > > > From: Kent A. Reed <knbr...@erols.com> > Subject: Re: [Emc-users] dedication > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Date: Monday, August 8, 2011, 6:38 AM > > > On 8/8/2011 8:14 AM, charles green wrote: > > ive been through five dozen installs of live cds from ubu 6 to > ten and the result is > > 'cant do mdi command without home" with the preceeding action being > successful home. at this point the enhanced machine controller is less > successful than the crummy accumotion software that i started out with ten > years ago on win98 with a driver based on the stepper H bridge and and two > parport controls through a 7400 series nand or some thing to make step one > and step two. the complexity of g code mostly is in interpolating arcs > because then trig is involved in the intermediate movement between the start > coordinate and the end coordinate. damn. and eveything requires a > password. can you imagine implimenting such stuff on a drill press? ..g81 > z-2. Authentication: ? > > > > > Charles, there are any number of people on this list who would like to > help you get to a good place with emc2, just as they have for countless > others. > > A little more information would help. > > For example, I just searched the source code base for each the messages > you have cited---"can't do anything without homing" and "can't do mdi > command without home"---and I don't find them. If you are paraphrasing > the messages could you please give an exact message so I can determine > where in the code it is generated? > > There are lots of questions in my mind about the specifics of your CNC > machine tool and the emc2 configuration you chose/created for it, but > I'll stick to the messages. > > Regards, > Kent > > > > ------------------------------------------------------------------------------ > BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA > The must-attend event for mobile developers. Connect with experts. > Get tools for creating Super Apps. See the latest technologies. > Sessions, hands-on labs, demos & much more. Register early & save! > http://p.sf.net/sfu/rim-blackberry-1 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > uberSVN's rich system and user administration capabilities and model > configuration take the hassle out of deploying and managing Subversion and > the tools developers use with it. 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