Hhmmm.... From your initial comments in your intro topic, it sounded like you need more help with Inkscape, and the basic maths. But now it sounds like you might need more help with the gcode, Lazycam, and external apps. So depending on how this topic develops, I might end up moving it into Using Inkscape with Other Apps board. (No worries btw, but just so you know.)
For the heart rotor screenshot, I see there are only 4 hearts. In the photo in your intro topic, there are 5. I guess you just changed that part of the design? Or is there some technical reason for the change?
That bit of text that you quoted sounds like something I wrote, although I'm not sure for who or which topic. Are you using that process for the heart rotor screenshot, or something else?
What's the drawing on the right side of that image? What is that which is indicated by "Start" and "End"? Some kind of wires? I was thinking the magnets' purpose was to keep it turning (by having another magnet on the end of an arm, that's turned the right way to repel the magnets in the circle). But that image that looks like wires starts to remind me of the classic wire coiled around a nail electromagnet experiment from high school (although with a different kind of layout).
I'm not familiar with gcode or Lazycam, but some of our members are. But for #1, what circles are you talking about? For #2, I'm not clear what is 1.4"?
Well, maybe will all be clear, when you add the promised more to come