ECM can be good stuff but often slow. LOTS of current at low voltage. NaCl or NaOH as electrolyte. Byproducts may not be soluble and therefore a mess especially if you make ferric hydroxide; a mess to filter. I thought about doing this in salt water. That is use water out of the bay. Not an option for very many users. ECM is slow because it is electrochemistry. One equivalent wt of metal/coulomb.
On another tack. Drill with carbide and then deburr by electropolishing. I've also seen some spring loaded tooling that will deburr both sides of a hole. Some things are simply not easy unless you have unlimited $$$ to throw at the problem. Dave On 02/11/2017 02:35 AM, TJoseph Powderly wrote: > > On 02/11/17 17:15, Andy Pugh wrote: >>> On 10 Feb 2017, at 22:42, Jim Craig <jimcraig5...@windstream.net> wrote: >>> >>> Seriously though, lasers are expensive. I actually considered lasers >>> first and went back to a regular spindle. >> Also, going back to something else mentioned here, ECM might work. It might >> be especially effective if the geometry allows several holes to be made at >> the same time. > true, less burr also > less volts, more amps > kind of like de-plating > use carbide tube ( you can get a round hole by rotating or using carbide > tubes ---old skool rule ) > a jig plate could do several at once. so the precision can be quite high > still requires gap-width controller > tomp > >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
