Scenario 1:

If the vector has overlapped paths and it will be cut repeatedly.
Solution：
In RDworks, you can use “Delete overlap” tool to delete all overlapped paths, like below.

Scenario 2:
If you’d to make a rectangle at 30×30mm, however, it becomes 29.9×29.9mm when cut it through on material, because there’s a little bit of gap appear on cutting edge, like below.

Solution:
In RDworks, you can use “offset polygon” tool to correct the error.

End.