To use the (also known as the JK721 or GoldCut 721) vinyl cutter via USB, you must install a specific USB-to-Serial driver. This is because the cutter's USB port uses an internal chipset to convert the signal to a serial format. 1. Identify the Correct Driver models utilize the CH340/CH341 USB-to-Serial chipset . Driver Name: CH341SER.EXE Compatibility: Windows 11, 10, 8.1, 7, and XP (32/64-bit).

Most Jinka plotters utilize the CH340 or FTDI chipset. Depending on your specific model revision, you will need one of the following:

| Driver Name | Best for | Download Search Term | | :--- | :--- | :--- | | | Many generic Android/dongle chips | Zadig (utility to install libusb) | | Google USB Driver | ADB/fastboot for Android | Google USB Driver SDK | | Snappy Driver Installer Origin (SDIO) | Automatic detection of old USB drivers | SDIO full offline driver pack | | DriverPack Solution (offline) | Broad compatibility (use caution) | DriverPack Offline Network |

Many Jinka 721 devices are (similar to Huawei E3372 or ZTE MF series).