For a "721" series cutting plotter (such as the USCutter MH-721 Redsail RS-721
⚠️ The 721 often uses a counterfeit CH340/CH341 chip. The official WCH.cn drivers work best.
If you want, I can:
Follow these methods in order. The best approach depends on whether you have the original CD or not.
Depending on your specific model, you can find official or community-vetted drivers at these locations: Jinka / Goldcut JK-721 cutting plotter 721 driver windows 10
Once upon a time in a small, dusty workshop, there lived a craftsman named who had just acquired a Cutting Plotter 721
: If there is a yellow exclamation mark, right-click the device and select Update Driver , then point it to your downloaded folder. USCutter Forum USCutter Software Downloads For a "721" series cutting plotter (such as
Wait for a message box stating "Driver install success" or "Installation complete."
Right-click your USB Serial Port in Device Manager and select . Go to the Port Settings tab. The best approach depends on whether you have
: Double-check Device Manager to ensure the COM port number has not changed. Windows updates can sometimes reassign COM numbers.
Wait for a dialog box stating "Driver install success" or "Installation complete." Step 3: Connect and Power On