Re: fANUC OT Mori Fuse blows
- From: "Bipolar Bear" <nowaynohow@xxxxxxxxxxx>
- Date: Sat, 13 Sep 2008 14:00:29 -0700
"John R. Carroll" <jcarroll@ubu,machiningsolution.com> wrote in message
Mori Seiki AL-20 with Fanuc OT-Mate control. Fuse "FX14" (1 amp) isFanuc error 905. External 24V line. Gee, only the whole damn I/O &
randomly blowing after about 30-40 hours. Mainboard, right next to
the power supply. Microfuse. Is there power supply voltage that is
just a tad bit high?
Anyone seen this in the past?
control side is 24V. How many switches etc could that possibly be? AND
it is very intermittent... Even Fanuc said good luck finding it. I
better get a whole box of fuses, or wire in a 1 amp breaker....
Went weeks using a 1 1/4 amp emergency fuse while waiting for the
special Fanuc 1A Microfuse to show up, so..... Typical current draw is
0.21A, so obviously it is spiking randomly.
Anyone have some suggestions on what it is most "likely" to be? There
are no obvious symptoms. The fuse blows while the machine is idle.
You might have an intermittent short in the oiling circuit.
That is something that probably cycles on a timer regardless the motion on
machine of your vintage.
Cooling fans and chillers are also relay operated.
Make up some nice long test leads and put a dc ammeter in series with the
fuse---carry it around with you while start jiggling switches wires cable
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