It seems as if you are only picking point and performing a final cut without any roughing type operations.
I would make a circle. Create the spiral path for the endmill. When you pick the spiral set the correct depth and perform roughing. If you did not make the circle smaller (for a finishing cut) the diameter of the circle will be already at size but the depth will be the only 'finishing' routine.
It sounds like you are cutting to final depth to start with. If you are trying to use a specific call routine your Anilam reads then you are on your own.
I also have no idea as to your ratio of endmill to counterbore size or if you have counterbore within counterbore.
From what I read I believe you problem is from lack of roughing depth being set.
mc_n_g |