Hi Joe,
The Hole Drilling operation will work for peck-drilling holes using a conventional drill bit. The next best thing is the 2D Trochoidal Milling operation, which will generate a spiral cutpath inside of each circular contour at each cutdepth down to the maximum cutting depth.
The 2D Profile Milling operation will require a cut stepover if the Cut Width parameter is non-zero, because a non-zero cut width indicates that there are going to at least be two cutpaths that are Cut Width apart from eachother, and there needs to be a cut stepover to indicate what increment to stepover at to get from the inner-most cutpath to the outer-most cutpath over the specified cut width distance. Hopefully that makes sense.
Cheers! :]
- Charlie