On Sunday, April 03, 2011 05:22:28 PM John Thornton did opine: > I run my lathe and mill from it. The lathe is about 7.5hp spindle and > the mill is about 7.5hp spindle. And of course it is so convenient I > just turn it on when needed and off when not. My EMC machines the > computer is on 120vac so I only need the phase converter on when > machining. I just checked and the single phase side draws 9 amps when > idling and 9.5 with the lathe spindle spinning with no load at 2k.
If using an 'AmProbe' like device to measure that, I suspect some reactive power is registering to it, that likely is not registering at the power meter itself. But thats more of a common sense feeling than anything else since it isn't terribly convenient to clock the meters disk and translate that to KWH. It could be done I guess, given a big enough curiosity bump. > I'd > say it is more efficient than paying the local coop to run 3 phase a few > miles back into the woods to me from the highway. Chuckle, for the first 30 years anyway. :-) By then you'll probably have solar and wind and be off the grid because its cheaper than petrol power. > On my BP Series 1 I > use an Automation Direct GS2 VFD as it is only 1.5hp for the spindle and > they are cost effective way to get up to 3hp 3 phase from single phase. I'd have to agree, and wish I had that big a mill, sniff... > John > > gene heskett wrote: > > On Sunday, April 03, 2011 10:46:26 AM John Thornton did opine: > >> John, > >> > >> I think it is finally done... sorry for the delay. > >> > >> http://gnipsel.com/shop/rpc/rpc.xhtml > >> > >> John > > > > How efficient would you say this is John? I can lay my hands on a 15 > > hp 3 phase motor for the base iron. > > > > And how big a 3 phase motor could be operated from it? > > > > I would have a hard time justifying an idling current draw of 35 amps > > a leg from the 240 to run a 3 horse motor on the machine. > > ------------------------------------------------------------------------ > ------ Create and publish websites with WebMatrix > Use the most popular FREE web apps or write code yourself; > WebMatrix provides all the features you need to develop and > publish your website. http://p.sf.net/sfu/ms-webmatrix-sf > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- 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) <http://tinyurl.com/ddg5bz> <http://www.cantrip.org/gatto.html> A long-forgotten loved one will appear soon. Buy the negatives at any price. ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
