I have mounted a indicator on the spindle and indicated on a precision angle plate....I got some weird readings so I switched to mounting indicator on table and indicated off drill rod in spindle...same issue. You can barely hear it but machine pulse as the indicator pulses. Also, I have the way leveled out...a machinists level barely moves in the Y axis. This obviously shows the column isn't perpendicular, how do you adjust for this on a 440?
Little by little I'm getting this machine sorted out, but it's a lot of work...

https://youtu.be/NZ2s8CUvObY