This is usually a "Static" issue or a "Flow Control" mismatch. Ensure your USB cable is shielded and that the COM port settings in the Device Manager match the settings in your software exactly. Driver Signature Error (Windows 10/11)
Open the on your PC (Right-click the Start button > Device Manager). Look for a section called Ports (COM & LPT) . redsail cutting plotter usb driver install
Even with the driver installed, your software (Artcut, SignCut, Flexi, or CorelDraw) won't work unless it knows which port to use. This is usually a "Static" issue or a