please apologize the "MS Powerpoint 2003"-looks 🙊

This was one of the first projects on my new prototyping CNC machine "Zerspanobert" in 2022: Making the parts for AnywhereAmps Alpha - a mobile multi-instrument combo that is described in-depth on my blog where you can also find a lot about the portal milling machine itself and other interesting projects/articles from the Mechanics, Electronics, and Software part of this world.

Cutting data from the video explained: F = Feed[mm/minute], the rate of which the CNC would cut through material S = Speed[revolutions/minute], the spindle's speed Z+ = depth per pass [mm], depth increment the mill shall cut XY+ = lateral feed [mm or % of cutter diameter], lateral depth increment

What I learned:

`F=3500m/min @ Z+=12mm` was experimental but works well for the cutter. Normally I have a much more shallow depth per pass. During full-slot milling, I saw the grid power to go down, so will have to take it back a notch again.
I messed up smoothing and roughing move directions. Smoothing should have the "Z movements", not roughing. That way, the surface would have turned out much better.
The plywood sheet I used was warped upwards in the center. I should have bolted it down to the spoilboard. Not doing this properly resulted in burrs at the sheet's underside and too high engraving depth.