On 29 April 2013 06:33, Cecil Thomas <wctho...@chartertn.net> wrote:
> My only > real concern is going to be integrating spindle speed control because > the existing control utilizes two huge rheostats to control the drive > motor field and the generator field. I might just lash up a servo or > stepper with a belt to the control knob. In your position I would be strongly tempted to remove the whole Ward Leonard setup, probably offering it to someone wanting to repair their lathe. You seem to have a single phase supply spinning a 3-phase idler motor spinning a second three phase motor spinning a generator spinning a DC motor. The Ward-Leonard arrangement is fairly elaborate in itself, but running it from a rotary phase converter is just excessive. I suggest that you might want to consider a single phase motor driving a generator to electrolyse water to run a hydrogen-powered fuel cell to create the DC supply. (Hmm, my attempt to think up the most ludicrous-possible arrangement has actually come up with a _simpler_ system!) It has to make more sense to couple a 3-phase motor and single-phase-input VFD directly to the spindle? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
