On Tuesday 08 December 2015 01:31:29 Jon Elson wrote: > On 12/07/2015 11:02 PM, Jeremy Jones wrote: > > Thanks everyone. Sarah, thanks for that great link. Not sure how I > > haven't come across that yet. I'm gonna look into everything. > > Thinking I might just got this route off the bat. Looking it might > > be a minimum of $1500 to fix the controls. I think the LCNC > > electronics will be cheaper..I hope. Want to get it up and running > > rather quickly as this will be put into service right away. > > These look like they have a pretty OLD control. Unless you > are really experienced in fixing this kind of gear, it could > just keep on having (expensive) problems. They just keep > getting flakier as they get older. > Some people are using my Pico Systems gear to run some older > Hardinge HNC machines. > > > Anyone know the possibilty of switching one of these over to single > > phase during the conversion? I'm guessing the spindle drive is 3 > > phase. Would need to see it to know for sure. Don't have it in hand > > yet. > > You can run most VFDs from single-phase power if you derate > them. So, for a 5 Hp motor, you'd get a 7.5 or 10 Hp VFD. > I'm doing this in my shop on a mill and lathe. (There are a > few VFDs that will detect the lost phase and won't run.) > Also, the servo drives may be taking 3 phase power, this > possibly could be a bigger problem to run on single phase. > > Jon > A published list (in the wiki) of those drives that will not run would be helpful Jon. With a caveat that its an incomplete list of course.
For instance, I thought I had found a spindle driver in the Empire devices treadmill controller, but destroyed 2 of them in less than 6 months doing rigid tapping with a complex 3 relay braking and reversal lashup. Switching to your servo amp, a full 4 quadrant controller, got rid of all that extra stuff. And the last mod you made I am using in the G0704 seems bulletproof, running quite cool. Highly recommended by Grandpa Gene. That info should also make it into the wiki. One user reports format... 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) Some mill pix are at: Genes Web page <http://geneslinuxbox.net:6309/gene/GO704-pix> ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
