I've been having this issue off and on lately... In the middle of a job, the port is dissconnecting and therefore the cutting job stops. It reads the following on the g code editor: [disconnect] PORT INFO: Port closed I flashed the software, turned off the limit switches in Grbl settings and that seemed to work for a few days. Now its having the same problem and I repeated that process and nothing... I've also turned the switches back on and off, changed the main usb cord, reset the control board / computer, updated OpenBuilds Control, used a different computer and repeated the steps above.. Tried most things now and about to start chasing wires to check all connections... Any help / ideas would be appreciated, thanks.