Code to plunge Z gradually and then retract along length of a profile path.

[Wal]

Vectric's Cut 2D does an admirable job of generating 2D tool-paths, but I'm wondering if there's a bit of G-code that's available to add in which will plunge the cutter to a specified Z depth as it travels to it's halfway point along the 2D path and then retracts the cutter as it travels along the second half of the path. I imagine many of the programs that carve letter-forms into wood use this technique, but is the Z-depth explicitly specified in each line as the G-Code is generated, or is it controlled by a clever bit of programming at machine level?



Wal.