On Tuesday, January 31, 2012 07:19:33 PM Peter C. Wallace did opine: > On Tue, 31 Jan 2012, gene heskett wrote: > > Date: Tue, 31 Jan 2012 11:31:26 -0500 > > From: gene heskett <ghesk...@wdtv.com> > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > <emc-users@lists.sourceforge.net> > > > > To: emc-users@lists.sourceforge.net > > Subject: Re: [Emc-users] Probing error? > > > > On Tuesday, January 31, 2012 11:15:31 AM Chris Radek did opine: > >> On Tue, Jan 31, 2012 at 10:49:04AM -0500, gene heskett wrote: > >>> show stopper. In doing a G38.2 f1 z2.5, it will probably stop well > >>> within a thou of contact. But then I am dead in the water because > >>> when I try to do a z move to #5063 + 0.01, it will move about .0005, > >>> breaking the contact, which is then reported as an error, shutting > >>> the machine down and > >> > >> Exactly what error do you get? > >> > >> I'm suspicious that it's not the break that's the error, it's > >> another bounced make. > > > > While that is virtually guaranteed to happen Chris, my point is that > > once the G38.2 move has detected a closure, stopped the named axis > > and recorded the machine state, the usefulness of the probe has been > > fulfilled, so why the heck should it care one way or the other when > > the machine tries to do a g0 z[#5063 +0.02] in order to back off and > > retry the G38.2 with a much smaller Fspeed to get a fine tuned > > position that doesn't have as much overshoot it it due to the > > machines stopping distances. It shouldn't care about the probe > > status when its making a non-probe related move. It does care while > > executing the following G00 or G01 move, and its reporting the probe > > break error down in the lower right corner and aborting the program. > > > > One thought I just had was to kill the move blending by a G34? P1 as > > the next move, forcing a full dead stop after the G38.2. I'll do > > that in an hour or so and see if that fixes it. > > > > Cheers, Gene > > Could this be fixed by a simple RC bounce filter followed by a > Schmitt trigger? > > (or maybe the software debounce comp in series with probe input) > I thought of that too Peter, but found that a solid 1 second pause immediately after the G38.2 had a hit, took care of it. > > Peter Wallace > Mesa Electronics
Thanks Peter. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> <Silvrbear> Oxymorons? I saw one yesterday - the pamphlet on "Taco Bell Nutritional Information" ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
