Re: [CAD_CAM_EDM_DRO] Fanuc 3m help

rocketscientistnate wrote:

> I just bought a Yuasa CNC mill off of ebay, and I need a little help
> getting it going. It is a 1981 model and has a Fanuc 3M control. I
> keep getting an error that means the Z encoder cable is disconnected,
> and following the troubleshooting guide in the manual (swapping cables
> and such) I've concluded the mainboard is bad. Does anybody know where
> I can get this repaired at a reasonable price (less than $1000)? Fanuc
> says it has a flat rate for repair on this board, I'm not sure how they
> do that, but was $2260. WOW! Anyway, I'd really like to get this thing
> going.

Do you have the full service manuals for it? Either way, you
might check what the encoder inputs connect to, and see if there
are some standard line receiver chips there. It is possible
that a fuse has blown, or one of the receiver chips has gone bad.

Jon