A CAm package will help you generate a "toolpath" for a particular geometry object.. It can be 2d, 3d or "non of the above".

Here is a screenshot of some toolpaths (The green lines):



The program will then generate "GCODE" which is what the machine controller reads to move the motors on your machine:

N01 G20 G40 G49 G54 G80 G90 G91.1
N02 G54

(.5 ENDMILL ROUGH T 1)

N03 T1 M06
N04 S374 M03
N05 G00 G43 H1 Z1.1 M08
N06 G90 G54 X-.93 Y.3671
N07 G01 Z.4998 F.8984
N08 Y.3161 Z.5226 F1.4973
N09 Y.2776 Z.5375
N10 Y.2669 Z.5413
N11 Y.2192 Z.5555
N12 Y.1733 Z.5665
N13 Y.1287 Z.5749
N14 Y.0852 Z.5807
N15 Y.0426 Z.5841
N16 Y.0006 Z.5852
N17 Y-.0409 Z.5842
N18 Y-.0835 Z.5809


The CAM package will need to generate the types of toolpaths you are looking for, on the types of entities, and also be able to output gcode to match your machine controller.. (They all speak a slightly different language) Also, the ability to customize this code output is good too, for personal configuration.

There's a start!