An unusual problem

[Clive S]

Thanks for the quick response, I am using a Chinese import 6090 machine with 2.2kw spindle, screw not belt driven, USB controlled motion card, Aspire 4.5 and mach3.

On each occasion there was no external noise source in the workshop, no machines started up or stopped and like I said, the computer and router are both powered through a large UPS to remove surges etc.

Ok well I now have read your previous posts and see that you are using a usb BOB. Are you using a laptop with it or a PC. How is the BOB being powered (ie via the usb port or through a separate connection? Do you know what the voltage is on the switch mode power supply?