On Wednesday 24 February 2010, Stuart Stevenson wrote: >> This would be ideal where the area can be kept relatively clean because >> the dielectric fluid is circulating, but as I found when I was EDMing a >> couple of >> broken taps a couple of years back, it falls over when you are in a deep, >> blind hole, the kero gets so conductive it eventually shorts out and I >> had to >> pull the electrode, move the table for access, blow the hole clean with >> an air hose, and re-fill my puddle with fresh stuff, about every 20 thou. >> And while it did work well and the holes were salvaged, it sure was a 3 >> day PIMA. >> >> for deep holes try pumping the fluid through a hollow electrode > Unforch, I am not equipt to do that and rotate the drill tubing at the same time, which I found stirred it enough that I could drill another 15 thou before it shorted. I did consider it though, but found that size of tubing was too fragile to cut a dielectric access port into the side of it without serious warpage. As I'm not, contrary to the tee shirt I'm wearing (Don't rush me, I get paid by the hour) actually paid by the hour, I just puttered along with what I could do easily. At my age, 75, its more important that I live long enough to finish the project. Being a type 2 diabetic, my warranty expired many years ago. ;-)
-- 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 university faculty is 500 egotists with a common parking problem. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
