SC7 "rotary machining" problem.

[chennan]

Hi, guys,
I have just used SC 7 for a few days, it came with the Tormach PCNC 1100 I bought.
I found I cant use the "rotary machining" process to finish a part provided in the tutorial documents.
Here I attach two pictures, the first one is the model provided in the tutorial documents which come with the SC 7, its name is "rotate".
The second one is the machining result after creating and running a "rotary machining" in the "finishing" menu of Tormach model.
The problem is that the process does not finish the part properly, you can see in the picture that some edges are left.
I think this should be a easy problem and "rotary machining" should be able to finish this part in one process. Or am I wrong? Anyone has anyone idea? I greatly appreciate your help!
Thanks,
Chennan