Yes Gene, there is no santa clause, especially when you are talking about copper. Just as a raw material it is pretty pricy.
In the past I just got a couple of matched transformers 120VAC to whatever, and put the secondaries together. It makes a good isolation transformer when set up back to back. Good transformers are never cheap. On Fri, Jun 12, 2015 at 6:09 PM, Gene Heskett <ghesk...@wdtv.com> wrote: > Hi all; > > In laying out how I am going to cnc this GO704, its apparent that the scr > or triac board it comes with to control a motor of undetermined power, > rated variously as 750 watts, 1kw, or needing 12 amps from the line. > None of which groks, but welcome to chinese specs seems to be the > operative response. :) > > Anyway, since Jon's pwm servo amplifier worked so well on my lathe, and > its theoretically capable of that sort of power (20 amps at 160 volts > IAACS), my mind is made up to use it again. But its I/O is not all > isolated so it must have an isolated power supply. > > But 1kw and up isolation cans are both scarce, and north of a $100 bill > pricy at least on fleabay. > > Has anyone got something laying around getting dusty that could serve as > a 120 to 120, or 240 -> 120 isolation, and that you might be able to > part with? I have 240 just 7 feet away from where I have it parked so a > stepdown would work just as well and would help balance the load. > > Send me PM's with what it is & how much you'd need and lets see if we can > deal? > > Thanks. > > 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> > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- ><> ... Jack "Whatever you do, work at it with all your heart"... Colossians 3:23 "Anyone who has never made a mistake, has never tried anything new." - Albert Einstein "You don't manage people; you manage things. You lead people." - Admiral Grace Hopper, USN "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Ben Franklin ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
