On Saturday 15 June 2013 20:47:44 John Kasunich did opine: > Why don't you just touch off? > > Home to any old place. > > Take a test cut at a programmed diameter of say 0.550". > That means the programmed X value is 0.2750. After > the cut, get the tool clear however you want, then move > it back to X=0.2750 (I usually just do an MDI command). > > Mic the part you just turned, suppose it came out 0.556. > That means that X was actually 0.2780", not 0.2760. > Poke the X touch off button, type in 0.2780, and the > machine is now set up to make accurate cuts. > I thought of that too, but ATM, possibly tomorrows project, is to establish some motion limits in the .ini file so that I don't crash into the ends of my screws, or chuck jaws.
In the meantime, I rebuilt the gauge as described, and have managed to get x at 0.503" to just hold a .0015 feeler blade against a well centered 0.500" drill rod. So now that I know where 0.000 is, I can now set meaningful limits. BTW John, thanks for confirming that the HOME_OFFSET applies to the radius, not the diameter. Calling it machine units in the manual is ambiguous when one isn't used to "machine units". :) I will probably have to use the touch-off anyway, depending on how sharp the insert is, but thats a different horse. Playing with G96 a bit, mainly to see if it works as advertised (it seems to if you assume the S400 you give it as an argument means 400 revs at the _current_ x position) I am puzzled because my M.H-book #27 doesn't seem to have a decent discussion on how to set the sfm according to the tool and material. Variations are of course mentioned, but nothing to serve as an anchoring point. Is there a chart or chapter I missed, or a URL to a decent tutorial so one might stand a chance of making a SWAG that works on the 1st test pass? [...] 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> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> Linux is addictive, I'm hooked! -- MaDsen Wikholm's .sig A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
