On Thursday 12 December 2019 23:06:00 Gene Heskett wrote: > On Thursday 12 December 2019 14:04:01 Todd Zuercher wrote: > > To the best of my knowledge it has always been this way. (My first > > 5i25 was bought in 2012.) > > I finally found a printout, and you are correct. For the GO704 build > its very carefully circled so that p3 is enabled, while p2 is not. > I've not pulled the other computer down to open the cover and verify > the jumpers on the one thats failing but the other BoB is being > powered only by a separate 5v5a supply. That lashup is all plugged > into a 6 outlet surge strip along with my air compressor, and the > breaker on the surge strip was tripped. One resetting the breaker, the > AC fired up and shut down at its set pressure. The ARK box was set to > autoboot and was presenting me with a login when I arrived in front of > it, so I ran linuxcnc -l, which it did normally, but about 5 minutes > later the screen blossomed full of sseriel failure messages. Stepping > back up the ladder, the 12 volt supply was acting like it was working > into a short, dim blinks of the 12 volt led at about once per second, > so I've either a short on the 12 volt line someplace, or a bad psu. I > have another, but it was also making the monitor flicker gently like > it was a real short dragging the power down for about a millisecond. I > unplugged it and verified I have a spare just like it, but in house > slippers my feet were complaining of the cold, so I turned off the > overheads as I was leaving. > > 2 things, I need to get a 4 foot heavy extension cord and get the AC > off that surge strip, and survey the 12 volt bus for shorts. The only > relay that was on at the time, has a flyback diode on its coil, so I > need to look at that diode carefully. With shoes on. :) > > Peter, my apologies, it really is a field power problem and its > definitely mine. Thanks for your patience. > > That particular psu has only a 2.1 amp rateing, and may not be enough > when everything is on as theres 2 4pdt relays, one dpdt driving the > air valve it has to drive from that same supply. I think that might be > telling me I need a higher amps supply, like 4 or more. I'll see what > I can find. > And I found, at trc electronics, a mean well supply rated at 75 watts, virtually the same size as the 25 watter with a tummy ache, which will fit under the 7i76D card in the interface box very nicely. $16.30, ordered 3, 2 for use and a replacement if needed. So this problem will be solved in due time. :)
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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
