Ok, been running a 4 axis foam cutter for years using a canned software.

I've recently been running a nice 3D router with Mach3.

Now, I've purchased upgrade electronics for the 4 axis foam cutter and will have bipolar setup.

I want to run G-code now to cut wings. This means that the horizontal axis will have to run at different feedrates, and so will the vertical axis. I want to be able to block the foam with rapid moves etc... then slow everything down for the airfoil cut.

Where do I start? I've been playing with 3 axis g-code for a little while so I am a tad familiar with how it goes.

I need to control the feedrate of each axis independanlty and at the same time.

How? Help?