Duncan's PCB (Printed Circuit Board) Milled by the blackToe CNC
Machine it really be called PCB? It's not really printed, right?
But it is a circuit board. This would be more appropriately
called MCB, or Milled Circuit Board. It's traditionally called
PCB Isolation routing when these come out of a CNC Machine
through a subtractive process (Machining/Milling). Circuit
isolation routing is just the removal of copper from a copper
clad board using a machining process rather than a chemical
process. This is considered the cleaner way and more
environmentally friendly way to create circuit boards. The main
challenge in creating circuits with a machining process is how
tight the clearances from each trace can be made. Although
Duncan's example does not show this aspect, he did a great job
in making some really small traces with the tolerances he did
not expect from the blackToe CNC machine. Such a tiny item
milled by a machine with a routing area of 2'x4'. Duncan wanted
to show me this example to illustrate the fin