Hi Mayo,
Thank you for the advice. You may be onto something there. It could be possible I guess. My power for dust collection, compressor are on a separate breaker. My Control CPU and Control box are on a dedicated breaker. My PC Router is also on its own breaker. Do you think if I bought a heavy duty battery backup to plug control computer and control box into it that should take away the question of voltage fluctuations?

The radio being interfered with is interesting. I wear a pair of Bluetooth headphones while running the bot that is synced to my cell phone streaming music. Do you think the Bluetooth technology could interfere with the 4g board?

Machine is grounded properly and all wiring very neat. I have just been living with the hiccups as I just gave up on it for a while. But I would still like to try a new idea and the battery might just be what I need to try?

Thanks,
Dave