X axis not working correctly

[Briney Eye]

I felt I should end the thread.
Binned the project completely. Could not cure the jumping display, gave up and have moved on to other things.

I had to go into my Shars/Shahe/Accuremote scale read heads and add 100nf VDD to GND to make them behave.

They can get away with minimal decoupling when running on batteries, but not when connected to a common return.