Hi, Lee
I'm using a sherline table but not there controller, If you want the dro to desplay properly you need to take the number of steps it takes to
make one complete turn of the table, divide it by 360, enter that value in steps per.
The Dia setting in settings page is for part size being cut, larger part slower feed rate, smaller part faster feed rate.
My settings (using 10 Micro-step control) are one turn 144072 dev by 360 = steps per 400.2, vel 2500, accl 500.
haven't checked the table for proper feed rates, But it has fast rotation.
Hear is a file set to .5 in settings page
Hope this Helps, Chip