wingnut,
Don't know the if post below will be of any value but seems seems easy enough to try. Never fooled with it.
RICH
I have had problems with constant velocity mode also. Specifically rastering back in forth in the Y direction. With CV enabled it would always seem to stop short in the y direction sometimes by even .06. Increasing the acceleration does help, but with a 100+ lb. gantry, it was sure hard on the machine at around 130ipm. I tried everything under the sun to eliminate it to no avail. Changing from CV to exact stop solved the problem in that it would make the full travel in the y direction before advancing in the x, but as you already know doing 3d work in exact stop is a night mare. There was one other thing that seemed to work and that was, going into the settings page and enable tangential control and set lift angle and lift Z to 0. This makes sure that the y travels the full distance before advancing in the x direction and coming back. Maybe something you can try. by JOHN