On Wednesday 25 April 2007, Dave Engvall wrote: ><http://www.isd.mel.nist.gov/personnel/kramer/pubs/RS274NGC_3.web/
Site accessable ONLY to NIST staff. >RS274NGC_33a.html> >describes G38.2 use etc. > >see: 3.5.9 Straight Probe - G38.2 > >3.5.9.1 The Straight Probe Command > >and 3.5.9.2 I should have printouts of those already, thanks. > ><http://www.linuxcnc.org/docs/html/config/emc2hal/emc2hal.html> > >motion.probe-input IN bit >G38.2 uses the value on this pin to determine when the probe has made >contact. TRUE for probe contact closed (touching), FALSE for probe >contact open. > >There is more out there someplace e.g. program to probe a hole ,etc >and a description of the program to log position values but I've not >found them. > I did get the two pieces of brass tubing and a suitable spring today, but the shack seems to have disco'd anything resembling an opto-interrupter. I can remember when the shack kept small town america radio stations on the air, often by having better parts than the TX makers used. Sadly, that is no more. I don't suppose you have a digikey part # for that handy? Hint, hint. :) >HTH > >Dave > >On Apr 25, 2007, at 2:25 AM, Gene Heskett wrote: >> On Wednesday 25 April 2007, Dean Hedin wrote: >>> I made this somewhat crude optical probe: >>> http://www.hedingrips.com/Dcp00470.jpg >> >> Now that's neat, and I believe the hobby store has those brass >> tubes in >> suitable telescoping fit sizes, so this looks exactly as if it will >> do the >> job. >> >> Thank you. >> >>> It's deceptively simple, but it actually works very well and is very >>> repeatable. >>> It only triggers in the downward motion of the spindle. >>> The "Renishaw type" probe that Dave mentioned can trigger from a >>> sideways >>> motion. >>> This one cannot, but of course that requirement may not be needed >>> for what >>> you are doing. [...] -- 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) A Smith & Wesson beats four aces. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
