Because the software will compare what you are drawing to the schematics file.
Printed circuit board design machine.
Design your board layout.
Now it s time to draw the board.
The idea began when i was tired of spending 25 minutes sloshing a printed circuit board pcb from now on around in a plastic tray and waiting for it to finish etching.
And it will help you create the same connections.
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.
You need to transfer your schematic diagram into a drawing of your printed circuit board.
It was messy and wasted a lot of time.
I ll get to end bit sizes in a moment but the thing you need to consider is the track clearance needed for the end mill you are using we started with a whopping 1mm clearance and track width and with experimentation we ve gradually.
Circuit design notes there are considerations you need to keep in mind when designing for cnc milled boards.
In eagle cad select tools drc clearance 2.
This isn t as hard as it might sound.
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.
A printed circuit board has pre designed copper tracks on a conducting sheet.