If you are using industry-standard software like FlexiSign or SignMaster, you might not need a specific "721" driver. These software suites have built-in drivers for generic cutters.
After installation, the driver is just a “dummy” driver. Most plotters use or DMPL emulation. You do not select “Cutting Plotter 721” in your software. cutting plotter 721 driver windows 10
Replace the USB cable with a shielded one shorter than 3 meters. High interference from stepper motors is common. If you are using industry-standard software like FlexiSign
