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RESOLVED:
The problem ended up being in the LX-61B main control card. I reverse engineered probably 30% of the logic circuit for command voltage and it dawned on me that I had a short between 12V...

I was able to find in the L1 manual the confirmation that +/- 10V is in fact the speed control voltage scale.

Now on to reverse engineering the LX61 control card..

Ok so something finally makes sense:
Both axes are being fed from J4 (Pin 1 for X & Pin 11 for Z) what appears to be rapid motion voltage at rest.
In the pictures Channel 1 (yellow) is from the...

OK.
After a couple days of reviewing and reviewing and etc etc after that very cathartic beginning post ..
It seems the first thing I need to look at is verifying the control voltage coming from...

The beacons are lit! Gondor calls for aid!!

I'm nearly about ready to admit defeat. OR at least that buying this machine was a mistake.

For the past couple years off and on I've been trying to...