Having set up my CNC - I now discover that the "software supplied with the CNC" is actually a demo licence for USB CNC - Not that I blame Planet CNC for making a living - but I had understood this to come with the appropriate Software to run the darn thing ... I'm limited to 25 cuts which doesn't help.

Is there an Open source free controller application that will actually work with my (generic Chinese 3020) CNC - or do I have to buy the software and chalk the experience to "never trust an online supplier ?"

In the mean time I've registered a complaint - but expect to get little joy from that