On 13 December 2015 at 11:01, Gene Heskett <[email protected]> wrote: >> Feed the cap bank through a resistor. >> Use a (cheap $5) solid state relay to bypass that resistor when >> LinuxCNC is turned on. >> > I had largely discounted that idea because the first cycle surge is > likely high enough to fuse a 40 amp Crydom. It trips a 20 amp service > breaker instantly when its master switch is closed. That would also be > complicated by needing a high side drive for it.
The relay won't see the surge, because what the relay does is bypass the surge absorbing resistor. The relay would go on the AC input side, so you would only need one. You don't need a "high side driver", you need a 5V signal from LinuxCNC. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
