On Sunday 16 June 2013 16:34:48 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. > To follow up John, after setting some limits, I homed it to my gauge with its offsets.
Then I loaded up a routine that I last used to make a 1/4-28 thread, with some fiddlng with touch off, that I used to make the last #209 nipple thread, which is 1/4-28 in the breech plug. The factory nipple is .248" in diameter, and my file said .249. I chucked up and centered a 1/4" rod, and ran the program. I wound up with a .249 diameter measurement and a 1/4-28 nut wouldn't screw on easily. So I edited the file & changed its target value to .248. Ran it again. A factory nut acted like it was hitting a burr or 7, but screwed on just fine with perhaps a thou worth of thread play. A new grade 12 bolt wouldn't have been any better. And no putzing with touch-off. Whats not to like, running at 700 revs because the whole 3 foot stick was in the chuck, the thread finish was quite decent, but 1000 revs on a shorter stick would have been better yet. That is still probably low by CSS std's, whatever they are. Now I need a project <grin>. I could probably make yet another new locking bolt and striker for my Black Diamond, but I think, because its for #209 primer usage, I'd probably need an FFL to sell it. Sigh. 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> I'm frequently appalled by the low regard you Earthmen have for life. -- Spock, "The Galileo Seven", stardate 2822.3 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
