Because the software will compare what you are drawing to the schematics file.
Printed circuit board design machine.
Set all of the different signals clearances to a value larger than your engraving tool 12mil seems to work for a zen toolworks 30deg v bit 3.
This isn t as hard as it might sound.
A printed circuit board pcb mechanically supports and electrically connects electrical or electronic components using conductive tracks pads and other features etched from one or more sheet layers of copper laminated onto and or between sheet layers of a non conductive substrate.
And it will help you create the same connections.
Design your board layout.
Use eagle cad drc to enforce design limitations 1.
Now it s time to draw the board.
In eagle cad select tools drc clearance 2.
I began to search for an alternative and did not get much farther than a bucket with a fish tank bubble machine and perhaps a heater.
You need to transfer your schematic diagram into a drawing of your printed circuit board.
A printed circuit board pcb mechanically supports and electrically connects electronic components using conductive tracks pads and other features etched from copper sheets laminated onto a non conductive substrate.
It was messy and wasted a lot of time.
Circuit design notes there are considerations you need to keep in mind when designing for cnc milled boards.