There is a fundamental problem with the way it's trying to do the move - X/Y/Z feeds are in inches/min while A feeds are in degrees/min. ANY feed move involving the A axis and any linear axis is going to have the wrong feedrate for one or the other. The only sensible way to do it is to rotate A, then feed in X/Y/Z, lather, rinse, repeat. You definitely need to go to a SolidCAM forum for help. I would expect there is probably a configuration setting that changes the CAM strategy to work better with the 4th axis. Either that, or go very shallow, with a small stepover, so you can safely crank the linear feedrate way up, to get the rotary moves going at a reasonable rate.

Regards,
Ray L.