On Tuesday 15 July 2014 23:37:39 Andy did opine And Gene did reply: > Leonardo, I recently had a problem very similar to this with my Kira > machining center. The light combination indicated a low voltage > problem and when checked every way I knew how, it wasn't there. So I > suspected the drive and sent it away for an expensive repair and got > perilously close to some critical deadlines waiting for its return. > The repair company (Galco) didn't find anything wrong but replaced the > caps and other miscellaneous small parts and sent it back. I still > had the faulting at intermittent times and was back to square one. > > Then it hit me like a ton of bricks - I had recently replaced an air > compressor and I could trace the faults, when they did occur, to a > voltage drop when the compressor kicked in. So I decided I should > either get a soft-starter or a VFD for the compressor. I ended up > sourcing a Schneider soft-start from Newark at about $230, and it took > a phone call to schneider to find out what the documentation lacked > but it was an easy wiring job and there are no more Kira problems. > > I realize this may have nothing to do with your problem except perhaps > to alert you to think about anything that may be contributing to your > issue. In my case, my Kira was doing exactly what it was supposed to > do - fault if that voltage went low. > > Andy
This is also prima facie evidence that the wiring is too light. I added a 200 amp service here in about 2003, leaving the original house wiring alone on its 60 amp box which became a subcircuit off the 200. Another 40 amp sub feeds my shop building, basically a 12x16 yard shed, fed by about 65 feet on 6-3 alu UF rated "range" cable. Its a good stiff circuit, the air compressor, a 3hp is still wired for 120 volts so its startup surge is considerable. But nothing dims the lights a detectable amount. In the house, we see everything that starts (except the whole house air conditioner, its on a separate circuit from the house) in the light flickers. There's a whole bunch of 14 gauge wire in the walls that ought to be 12 or even 10 gauge. And way too much stuff on one circuit, everything in the semi-finished basement is on one circuit. Grrrr. 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> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
