PCB CNC: Unterschied zwischen den Versionen

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First of all you will create a PCB in a program called pcb. Then you will export gerber files from the pcb and generate ngc files with pcb2gcode. These ngc files can be read by linuxcnc.

For a Single Layer PCB you will run Steps 1,2,3,4 and 6 for a dual Layer you will run 1 to 6.

=== Create the PCB ===

[[Datei:Pcb layer groups.png|thumb|400px|grouping of layers in pcb]]

gEDA's pcb is a complex tool to work with. It might not be as easy to use as other tools in the first place, but can do everything another tool can do.

Normaly you will design the PCB as you would do normaly, just remember that you need some extra clearance because of the cutter diameter.

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* All Top Layers go to one group

* Outline is one group

~~[[Datei:Pcb layer groups.png|thumb|400px|grouping of layers in pcb]]~~

=== pcb2metalab.sh ===

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git clone pcb2metalab from here: https://github.com/reox/pcb2metalab

If you modify the Makefile and run make, it will build all necassary files for you. You can check the output of the gerber files with a tool called gerbv and there are also some png files for debugging.

=== Milling of Bottom Side ===

Now its time to go to the CNC and put in the PCB. Load the backside ngc file. Now you need to touch off the workpiece.

Remember now two things: The coordinates in the pcb2metalab generated files are in inch and the PCB is not super flat!

=== Drilling the Bottom Side ===

The Next step would be to drill. Because the workpiece is already touched-off, it should go smoothly.

=== Switch Sides ===

[[Datei:G10command.jpg|thumb|400px|The math behind the G10 L2 command]]

This step is now crucial for the quality of the dual layer PCB.

== Usage ==