: If your computer doesn't recognize the plotter when plugged in, you likely need the FTDI USB Driver
Most budget plotters use a serial-to-USB chip. If your computer doesn't recognize the plotter, download the CH340 USB Serial Driver Manufacturer: WCH (WinChipHead) Compatibility: Windows 7, 10, and 11 Allows your PC to see the plotter as a 2. Compatible Cutting Software si 721 cutting plotter driver download patched