Perhaps a video would be unnecessary, but some photos would sure help us curious folk better visualize your setup. It sounds like a very handy system you rigged up, and not very difficult.
Thanks, -- Ralph ________________________________________ From: Gene Heskett [ghesk...@shentel.net] Sent: Thursday, July 21, 2016 4:47 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] EDM with continuous wire? On Thursday 21 July 2016 03:05:51 TJoseph Powderly wrote: > sounds great gene > yes you were 'negative polarity' > ( in usa the old elox company called this standard ) > brass works fine too, more forgiving > if the tool gets black you are getting closer to lo wear > tho low wear for brass is like high wear for graphite > you're using an rc generator... so dontworryaboutit (james caan) > everythings relative ;-) > 1/32 slot? automatic? sweet. > movies at noon? > tomp tjtr33 I'd think that would be rather boring after the first 4 or 5 minutes. A tomato can of k2, enough to cover it, is, by the times its into the cut by .1", quite black, and in another minute dense enough the sparking is invisible. And at nominally 40 volts, is hard to hear. The last time I did this, I had 80 volts, and with the 10uf cap, its was painfull, easily heard a couple blocks away. This is so quiet its boring. So it looks like I'm stirring a can of black, thin paint. I have a dvm across the current limiting R and try by ticking the feed override up and down, to maintain about 3/4 amp, but at that feed rate, even the dampers on the motors are moving so slow you'd not notice them in a video. 7 to 20 thou a minute. Feeding both X and Y because its laying corner to diagonal corner in a square container. The disk isn't turning black, but is showing that it is wobbling up and down a thou or 2 as the top has an rough feeling arc pattern over about 50% of its face. The edge has remained pretty well polished once it had burned down to holding a continuous arc. How does distilled water compare to K2 in this sort of a scenario? I could source a gallon of that while the glue is setting to put the nut I'm using for inter angle positioning back on. Thanks Tomp. > On 07/21/16 11:51, Gene Heskett wrote: > > On Wednesday 20 July 2016 22:34:00 TJoseph Powderly wrote: > >> Hello Gene > >> Using copper tools to cut steel ( all other variable untouched ) > >> Positive tool is lower wear & slower cut & rougher finish > >> Negative tool is higher wear & faster cut & finer finish > >> hth > >> tomp > >> tjtr33 > > > > No copper flashing handy, so I used a thin sheet of brass. I made an > > arbor to hold a disk, then cut out a 3" disk which I ran against a > > skate wheel bearing hard on the down face, enough to bend it > > slightly, then followed the demag procedure and lifted it back off > > the bearing slowly so it would stop bending at the point where it > > ran dead true. But the 1/8" center hole and a 3mm0.5 retainer screw > > were off center just enough it took an hour to burn the edge > > concentric, but once that was done I could, for shade tree edm, > > march it right along at about 30 minutes a slot. Burn current about > > 1/2 amp average. I had glued with some si glue, a nut to the far end > > so I could lay it down on the flat, but the GO2 wasn't fully set, so > > the K2 screwed the adhesion enough the nut fell off just now. I have > > one more slot to cut, so I'll see if any of my superglue is usable > > tomorrow. > > > > In resuscitating my previously built edm power supply, I found I'd > > put a dpdt switch so I could reverse it, but the way I hooked it up, > > the dvm said I had + on the workpiece. It seemed to work ok > > considering the voltage was only in the 30 something range. That > > would match up with your - on the tool. > > > > Thanks Tomp. > > > >> http://connection.ebscohost.com/c/articles/66135144/effect-tool-pol > >>ari > >> ty-machining-characteristics-electric-discharge-machining-silver-st > >>eel- statistical-modelling-process > > > > I bookmarked this one. good discussion. > > > > Cheers, Gene Heskett > > ---------------------------------------------------------------------- >-------- What NetFlow Analyzer can do for you? Monitors network > bandwidth and traffic patterns at an interface-level. Reveals which > users, apps, and protocols are consuming the most bandwidth. Provides > multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make > informed decisions using capacity planning > reports.http://sdm.link/zohodev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
