Run the driver setup before plugging in the USB cable to ensure Windows recognizes the device correctly.
Many RS720C units are built around the WCH CH341 USB-to-serial chip. This driver works even if the official Redsail driver fails. redsail cutting plotter rs720c usb driver download 32 bit
Find or USB Serial Port and note the number (e.g., COM3 ). Configure Flow Control: Right-click the COM port in Device Manager > Properties . Run the driver setup before plugging in the