Originally Posted by
routalot
I just looked at the product details and saw this:
The USS can be powered directly via USB. However, you need to make sure that you are using a quality USB cable. Some inferior USB cables can't carry a sufficient amount of current, in which case the 5V logic of the USS may perform erratically.
That might be a good place to start.I would suggest downloading LinuxCNC and running it from a live installation (either a usb memory stick or DVD,rather than a permanent installation) to see if the problem persists as well.One part would determine that the hardware was the source of the problem and the other would eliminate the Mach 3 installation and configuration.It must be hugely frustrating to have the machine sitting there apparently ready to go,but for an intermittent fault.A fault that is present every time is less exasperating as you can be sure that the fix will be just that and will last.