I am wondering if it just temperature related, I will have to turn the AC unit back on, and put a temp sensor in the cabinet, and see if I can get a common trip temperature maybe. Dropping the cabinet temp 20 degrees has got to make some stuff contract a little bit, maybe enough to make a crappy connection on the circuit board if it is a cracked resistor or capacitor??
Rick On 08/02/2016 11:56 AM, Leonardo Marsaglia wrote: > On the Mazak lathe I often have problems with the drives tripping out when > there's high humidity levels (85% and up). In fact, the drive doesn't want > to turn on at all, whenever I turn on the machine it's on fault state. Most > of the time it happens on one of the drives, but if the humidity is too > high, both of them are tripped. This one only has fans but no air > conditioning system. > > I don't believe that a low humidity enviroment could cause the problem, but > I'm just guessing. > > The same machine had a Fanuc 3 phase AC drive for the spindle. That one > tripped out from time to time, but worked ok. One day, it started to trip > several times on the day, until finally we never could make it work again. > Apparently the problem was on the main board, because everything else on > the power stage was just fine. We replaced the drive because a Yaskawa > drive was cheaper than the main board only. > > > > 2016-08-02 12:39 GMT-03:00 Rick Lair <r...@superiorroll.com>: > >> Hello Guys, >> >> I have a Fanuc triple axis servo drive on one of my machines, and since >> last Thursday it has been randomly tripping out, and faulting the cnc >> control. It is from roughly 1995, and has been running just fine up >> until this point. Even while just sitting powered up, but with no servo >> motion commands it will trip out and shut off the machine. I noticed >> though, that when the cabinet doors are shut, it trips almost all the >> time, when I open the cabinet doors, it has been running since Friday, >> only tripping just once, early yesterday morning. The cabinet is air >> conditioned, and had the thermostat set at 95 degrees for the point to >> turn on. We turned it down, to 75 thinking that would help, but I think >> it actually made it worse. Would there be any way that on an old PCB, if >> something was going south on it, a humidity level that was too low could >> cause something to not work, and when it is hot and humid, it would >> function properly? >> >> Here is a link to an identical PCB, >> >> http://www.fanucworld.com/media/image/800/0/A20B-1001-0770%20Front.jpg >> >> -- >> Thanks >> >> >> Rick Lair >> Superior Roll & Turning LLC >> 399 East Center Street >> Petersburg MI, 49270 >> PH: 734-279-1831 >> FAX: 734-279-1166 >> www.superiorroll.com >> >> >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > -- Thanks Rick Lair Superior Roll & Turning LLC 399 East Center Street Petersburg MI, 49270 PH: 734-279-1831 FAX: 734-279-1166 www.superiorroll.com ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
