On Monday 27 April 2009, Kirk Wallace wrote: >I don't know enough about EDM. Does this look like a good EMC2 project? >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170321678813
Auction closed now. I don't think I'd want to put $500 into it since edm can be done, although non-automatically for under a $100 bill, I've done it several times here. Last time I needed 4 holes in a 10" saw blade to mount it on my rotary table and use emc to sharpen it. Drill bits just bounced off its chrome plated side surfaces. I grabbed a caulking gun, the rim from a plastic spool of teflon tape, coated the rim with caulk, set it down on the saw blade & poured it full of kerosene. Ground on a length of 1/4 brass pipe in the mills chuck, hot on the blade mounted on wood. Supply is a pair of $7 36 volt transformers, secondaries in series feeding a full wave bridge, the bridge feeding through a 50 ohm 200 watt resistor, with a 10 uf paper capacitor as the discharge storage capacitor. Set z down till it gets real noisy and start the spindle at about 100 rpm, feed at about .015" minute. The kero will blacken rapidly, but you can hear the progress. For younger ears, a set of gun mufflers might be in order, that 10 uf is NOISY when it fires. Smaller cap would be nice and quieter but that is what was in the junk box at the Heskett Ranchette. As the blade was a thin kerf blade, about 6 or 7 minutes a hole. Nice, very neat holes that cleared a 1/4" bolt about .005". Did anyone ever come up with a method to automate the feed via emc for this? -- 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) I can't drive 55. ------------------------------------------------------------------------------ Register Now & Save for Velocity, the Web Performance & Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance & Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
