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 <[email protected]>: > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
