The start point for the "Plunge Milling" operation was starting in the center of the material instead of starting from the outside of the block and working it's way in.
SolutionReview the video.
The following must be taken into account...
1. The "Cut Pattern" must be set to "Follow Periphery" .
2. "Pattern Direction" must be customized unto the "Plunge Milling" dialog box.
3. "Start Point" needs to be defined.
4. Select the "Cut Region Start Points" with the settings seen in the image below...