The story of the (JK 721) driver is often one of a scavenger hunt through the corners of the internet. Because Jinka is a widely white-labeled "Chinese plotter," finding a "verified" download usually means looking to regional distributors or specialized cutting software forums. The Search for the "Verified" File
: Run the USB-to-Serial/CH340 installer from the downloaded folder. This creates a virtual COM port. Identify COM Port : Open Device Manager on your PC. download driver cutting plotter jinka 721 verified