Many newer RS720C units use the chip. If the official Redsail driver fails, you can use the universal CH340 64-bit driver (commonly used for Arduino, 3D printers, and CNC).
, right-click the unrecognized USB device (often listed under "Other devices"), and select Update Driver redsail cutting plotter rs720c usb driver download 64 bit
Once the driver is installed, the RS720C appears to the computer as a COM port (e.g., COM3). This is a critical step because cutting software like Artcut, FlexiStarter, or SignMaster does not communicate through a standard USB printer port. You must manually configure your software’s output settings to match the COM port assigned in the Device Manager. Additionally, ensure the baud rate is set correctly—usually 9600—to prevent "buffer overflow" errors where the machine stops mid-cut. Many newer RS720C units use the chip
A dedicated ensures stable, high-speed data transfer and full access to the plotter’s features (force, speed, and blade offset). This is a critical step because cutting software
in Device Manager. Note the assigned port number (e.g., COM3) for use in your cutting software. Software Compatibility