Thanks to everyone who provided assistance. I eventually solved the problem by using the G93 command. I computed a new tool path with each G1 command corresponding to 2 degrees of rotation of the A axis and then whatever corresponding X movement that was need to follow the part profile. For each G1 step I computed the total tool movement using Pythagorean's theorem and the distance traveled equaling the square root of the sum of the squares of the X distance and the circumferential distance (which was computed by the A angle in radians times the radius of the part). Knowing the total distance traveled for each G1 command, using the G93 command I computed an inverse time value (F) for each G1 command by taking my desired feedrate and dividing it by the distance traveled. Since my part was approximately 1.9 inches in diameter and since I chose to machine it at a slow rate of 2 ipm, I got inverse time values on the order of 60 for a straight 2 degree rotation of the A axis, down to an inverse time values of 22 when the G1 step included the 2 degree rotation and a significant movement in the X direction.
After re-assemblying my CAM program I was able to machine the part with basically a constant feed movement of the tool whether the toll was simply moving along the circumference of the part using only an A axis rotation, or whether the tool was moving both around the circumference and in the X direction in a spiral path around the part. Finding out about the G93 command was a real help.
