Hi Nick, unfortunately the company I got it from isn't so good at communicating when there's no money involved. And by the time I've forked out and messed with sending it back to china, I figure I may at well attempt to resolve the problem myself.

The black box with power supply has a VFD & SMC 4-4-16a 16b DSP built-in. I bought the DSP version so I didn't have to mess about buying Mach3 and connecting it to a PC. The built-in VFD powers up OK and operates the spindle, but the SMC unit is as dead as a dodo. So I have no means of sending gcode to the machine(from a TF card) to operate the steppers.

I guess I could attempt a re-wire and test the wiring, but I can't find any wiring diagrams for the SMC. I'm wondering if I'd be best salvaging the power supply, VFD and stepper drives and buying a USB or Ethernet board so I can operate the steppers and connect to a PC. I'm happy to go "cheap and cheerful" as long as it works reasonable well - even if it's just to get me up and running. Thought I'd ask you guys for any help or advice.