Hello from Nottingham

[Robin Hewitt]

what's the software your using? Love messing about and learning stuff.

Hi Alan
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Most software,when handed a mesh, converts it to a series of straight parallel lines. It does one line at a time and jiggles in the Z axis. Then you rotate your lines through 90 degrees and do it again, maybe even stick in a 45 degree pass to try and get rid of the pointy bits. If the software doesn't allow a tool change this can mean cutting the entire she-bang with your tiniest tool. Yawn.
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I think Cam Bam is the best of the cheap packages because he will rough and water line a mesh, he may even check for collisions with the back of the tool. I think he offers some kind of suck it and see before you buy.
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Robin