Hi, Charlie
In the Settings window there is a Rotation Diameters section, Enter work Diameter for your axis there, helps Mach control F-speed.
Still need to set rot. axis in steps per degree of rotation, One full turn divided by 360 = steps per deg.
My steps per deg are 400.2, vel 2500, acl. 500, 10 micro step comtrol 144000 one full turn sherline rotary table.
Hope this Helps, Chip