After installing, you must go into the Device Manager and ensure the plotter is assigned to a COM port between 1 and 4 . If it defaults to a higher number (like COM12), Windows 10 often fails to send cutting data.
: If it shows an error (yellow triangle), right-click it and select Update Driver . Browse your computer for the driver file (often named CH341SER.SYS or similar on your installation disc). Identify COM Port : Once installed, note the assigned port number (e.g., Jk 721 Cutting Plotter Driver Windows 10
Navigate to > Advanced options > Startup Settings > Restart . After installing, you must go into the Device