Sometimes it’s easier to think of this in terms of the machine abstractly.
All of these are a ‘tool path’ that is followed by the tool (laser). This is the guideline of cut. You adjust the offset from the tool path in two direction, this is a kerf adjustment. Your ‘tool’ will cut the tool path or on either side, if programmed.
All the line interval is, from the software’s perspective is how close the tool paths are from each other… As with math in general you can ‘compute’ this down much further than is practically useful.
If my math holds out and my memory for size, the pulley on mine is about 20mm X 3.14 is about 63 / 2000 steps/rotation is about 0.0315mm in one step… I’d think that’s the best resolution you could hope to achieve. There are u-step devices out there…
Seem correct to the rest of you?