First attempts! Not perfect but usable.. The PCB moved alot in Z axis.. Traces are 0.4mm – or try to be. That’s probably the safe minimum. Full board size was 71.6mm * 100.2mm (note to self). I used this bit – a 90 degrees 0.1mm V-shaped bit. Drill size was 1mm, should use 0.8 or 0.6mm size drill..
My first adventures in the land of CNC milling was to make a wooden box. I’ve always liked boxes, finger joints and computers. Don’t ask me why.
However the problem with CNC milling is that inner edges tend to come round – for some strange reason. On a finger joint it causes problems; the pieces won’t go to the very end of the joint.
I overcome this by making a little “notch” at the inner edges (see images below). So I wrote a PHP script that generates a PDF that I can use when generating toolpath for the machine. Now I can make different size boxes with just changing few parameters!
40mm x 40mm, 10mm notches, 1mm end, 250mm/min, 1mm layer
http://www.thingiverse.com/thing:175202
