Even with the driver installed, the software often can't find the plotter if the COM port number is too high. The Under-10 Rule : Ensure your assigned COM port is between COM1 and COM9 . If it’s COM10 or higher, manually change it in the Device Manager Port Settings > Advanced Matching Settings : The "Baud Rate" (usually
Appendix: Useful Commands & References
and a null modem cable rather than the built-in USB port, which can sometimes be unreliable. Configuring Your Software How to Add Printer Driver in JK721 Cutting Plotter cutting plotter 721 driver windows 10
: Most budget 721 plotters use the CH340 chip. You can often find these drivers on the USCutter Support Page or through Windows Update. Even with the driver installed, the software often
How to Install & Find Drivers for a Cutting Plotter 721 on Windows 10 Configuring Your Software How to Add Printer Driver