Sunday, 21 November 2021

CNC machining 'pads' on a CNC3018

I needed a circuit board for a TVI filter to stop 2 metre interference, like this (I'm going for the 144 and 432 MHz layout)
http://www.vk3nx.com/TVIfilters.html

I used 'Carbide Create' to 'draw' what I required
(Click the images to go supersized)



Then, added Toolpaths to machine outside of the darawing/pads


Set the cutter, depth, speeds/feedrate etc and save the GCode.
Load the gerber into 'Candle' and probe the PCB for a heightmap.
Set it off with a 1mm end mill and the board was done cutting in 45 seconds!

Quite please with the result - hope it works when finished assembling!


Fully assembled and tested, over 83db of attenuation at 145MHz and 45db at 433MHz









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