Most of the time our needs are to make just one PCB at any given time. However, if you need to make several at the same time, try this technique to save you a lot of time. This short video walks you through the process.
This process uses Sprint Layout software to design the PCB which also allows the exporting of Isolation Milling and Drilling data. Next, a program written in Python takes that data and creates the CNC program which is what is used to provide instructions to the CNC machine.
A DIY CNC router is then used to mill the traces by a process called Isolation milling. The machine also drills all the holes, and mills the peripheral edge of the PCB to free it from the stock.
For legends, the top side is painted a dark color, then the PCB is put back on the machine and the lettering is engraved.
Cheers!
Chris
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