DIYbanter - View Single Post

Jon Elson

wrote:

Greetings All,
One of my CNC mills has a problem. The machine, a Fadal 15XT, built in
1998, (I think), keeps showing an alarm for a malfunction the machine
can't have.
Likely there is a rack of opto-coupled sensor modules. The lube and air
pressure sensor positions have likely been dummied out with jumper
wires. The symptom you describe is typical of a worn-out opto-coupler
where the LED light output is dying from being lit for 15 years. If
you can figure out which input coupler is the one for these functions,
you can probably just replace them. PLCcenter is a great resource
for all sorts of obscure Japanese components like this.

Jon