It's not the way I like to start out .... but the other day the drill I use to fasten my materials down to the table .The cord arced out on one of the x axis rails with leaving a welding pit in its place . The machine hasn't moved since the arc.Ive replaced the serial/usb adapter with rs232 model the usb works again but no connection to the control box is made is there anything special with the adapter that got fried.