[Al_The_Man]

Actually on the older Accu-rite it was hard to be out of alignment, as although there was a procedure for mounting the reading head, they were spring loaded against the scale, this was one of their downfalls, the head was a plastic material and over time would wear, and eventually cause problems.
As opposed to Heidenhain (who bought them out), theirs had small roller wheels that did not produce wear.
Bill, Do you have the original scales that came with this display? If so, you would think the switches were set OK.
Al.