Disconnect the USB cable from your computer.
Ensure the USB cable is under 3 meters. Long cables can cause signal loss for Jinka 721 plotters.
Follow the on-screen prompts. A message saying "Driver install success" should appear. Reconnect: Plug the Jinka 721 back into the USB port. -VERIFIED- Download Usb Driver Jinka 721
If you see "USB2.0-Serial," you likely need the CH340 driver. Step 2: Download the Jinka 721 USB Driver
Most Jinka 721 models use the CH340 chipset. Before downloading, check your device. Connect the Jinka 721 to your PC via USB. Open (Right-click Start > Device Manager). Look under Other Devices or Ports (COM & LPT) . Disconnect the USB cable from your computer
This is the most common driver for Jinka cutters. It supports Windows 7, 8, 10, and 11.
Right-click the device, select "Update Driver," and choose "Search automatically for drivers." If that fails, manually point it to the folder where you extracted the downloaded driver. Follow the on-screen prompts
To ensure a safe installation, use the verified driver links provided by official distributors or chipset manufacturers.