I have a Fanuc O-MD controlled VMC that has been performing flawlessly for about 6 years.
It is a 40X20 machine that was built by Yang I think, Model SV-1000.
Today, when I fired it up I got this alarm:
After checking...the air pressure was good...the gages read OK...but the alarm would not clear.
So, I took the cover off of the pressure switch, and connected the two wires together bypassing the switch. No good.. the alarm wouldn't clear.
Next, I traced the wires from the switch to the I/O board. One wire was connected to terminal "DC24VA" and the other wire connects to "319". I used my volt meter and verified that DC24VA read 24 volts...then made a jumper to the "319" terminal which effectively jumped out the entire air pressure switch with it's corresponding cord. The alarm still wouldn't clear.
I called the machinery dealer where I bought the machine...explained this to the tech guy and he said "it's a bad I/O board".
Here's the question....what is the I/O board? I have two of them.
Here is a photo of my enclosure:
The pressure switch connects to a terminal strip on a circuit board located on the left hand side...noted with arrow #1. This board has a handful of relays on it. There are some ribbon cables that go from this board to the Fanuc i/o noted by arrow #2.
The board in arrow #1 seems to be from the machine tool builder with a part number: YANG SMV-600-003-1 and the Fanuc i/o mounts in a rack and has a familiar fanuc number: A16B-2203 0110/02A
So, there seems to be 2 i/o boards: 1.) The machine builder's board where the pressure switch connects ....and 2.) the Fanuc board that is connected by ribbon cable.
This is a pic of the board on the left side noted by arrow #1.
So...any ideas where to go from here...or how to trouble shoot the electronic components.
The machinery dealer has been less than excited to get involved and I don't really have much faith in them to help me get running quickly.
Whattaya think?
-Rob
It is a 40X20 machine that was built by Yang I think, Model SV-1000.
Today, when I fired it up I got this alarm:
After checking...the air pressure was good...the gages read OK...but the alarm would not clear.
So, I took the cover off of the pressure switch, and connected the two wires together bypassing the switch. No good.. the alarm wouldn't clear.
Next, I traced the wires from the switch to the I/O board. One wire was connected to terminal "DC24VA" and the other wire connects to "319". I used my volt meter and verified that DC24VA read 24 volts...then made a jumper to the "319" terminal which effectively jumped out the entire air pressure switch with it's corresponding cord. The alarm still wouldn't clear.
I called the machinery dealer where I bought the machine...explained this to the tech guy and he said "it's a bad I/O board".
Here's the question....what is the I/O board? I have two of them.
Here is a photo of my enclosure:
The pressure switch connects to a terminal strip on a circuit board located on the left hand side...noted with arrow #1. This board has a handful of relays on it. There are some ribbon cables that go from this board to the Fanuc i/o noted by arrow #2.
The board in arrow #1 seems to be from the machine tool builder with a part number: YANG SMV-600-003-1 and the Fanuc i/o mounts in a rack and has a familiar fanuc number: A16B-2203 0110/02A
So, there seems to be 2 i/o boards: 1.) The machine builder's board where the pressure switch connects ....and 2.) the Fanuc board that is connected by ribbon cable.
This is a pic of the board on the left side noted by arrow #1.
So...any ideas where to go from here...or how to trouble shoot the electronic components.
The machinery dealer has been less than excited to get involved and I don't really have much faith in them to help me get running quickly.
Whattaya think?
-Rob