Karl Townsend wrote:

I pulled to the old servo drives out of my Matsurra bed mill and got
all the wire run cables separated as much as possible. Most of the I/O
cables have less than ten conductors and you can deduce what they are
for by where the cable run goes.

I have two fifty conductor cables that go to the operator panel. I'm
guessing fifty inputs on the operator panel so there are a great many
more wires than used. I have no manual for this machine and these
wires aren't numbered. Looks like a REAL MESS to figure out the
function of each wire.

Each input is pretty simple, if it is made it conducts voltage. But
doing this many at once becomes a snow storm. Any suggestions on best
approach?


I would group a lot of resistors and tie one end of all of the to
ground to ground. Use in multiples of 10, like 10, 100, 1k, 10k, 100k,
1M, 10M ohms to make it obvious which wire is which. Then probe the
wires at the other end. In seven passes you can identify the entire
cable.


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