I have one of Jerry's USB gizmos and have it connected to my hurco md1 and md3. Works good. Easy to use.
Be very careful on what you connect to the rs233 port. I burned both of mine out by connecting it to a computer. I was told this was because the hurco is connected to a phase converter and the computer is connected to a secondary power source.
I connected Jerry's USB to the power on the hurco and have had zero issues with it.
If you have any questions just ask.
Steve
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