If you like making your own printed circuit boards and have a CNC machine wouldn’t it be nice to do some Cheap PCB Isolation Milling? Well how is free, that’s right ähöüokul has put together an Instructable that goes through the process using only free software.  Below will show you all the things you need.
“Things you need:
- computer with internet connection
- cnc mill/router, the more accurate the better
- 45°/20° V-Bit
- 0.8mm drill bit
- 3mm endmill
- copper clad board
- double-sided adhesive tape
You need the following software: