Hello, I have been using the CNC xPro v4 for a few months now with the ACRO system build and it has worked great. However, I recently have tried adding a third axis motor to the Z terminal and cannot get it to work. The red LED is on continually whenever the motor is plugged in. I have tried reflashing Grbl a few times but no changes. I know it is not a motor or wiring issue because i can plug the motor into another axis and it works fine. Moreover, the USB LED also continually flashes orange and green when running OpenBuilds control but not when using standard serial terminal like TeraTerm. Has anyone experienced problems with the third axis and have any solutions to try? Thanks!