After a time with a multimeter and scope, the othewise-undocumented Cronos board for home-build cnc machines has revealed some of its secrets. Overall, it seems like a proper grown-up design with a ...

Control is thanks to an Arduino Mega fitted with a RAMPS board, running the Marlin firmware. The plan is to use the machine to test out a variety of CNC machining techniques.

For precision machining on hard metal, machine rigidity is of utmost importance. [Ivan]’s original CNC mill made extensive use of lightweight aluminum extrusions with 3D printed fittings.

He collected scrap from nearby electronic shops to try out new things.“I shortlisted a few projects and finally decided to design the cheapest four-axis CNC machine. It cost me just Rs 1,500.