To set up your 721PE Cutting Plotter (often associated with the JinKa JK-721PE brand), you will need a specialized USB-to-Serial driver

This guide provides everything you need to locate, download, and install the 721PE drivers to get your plotter running perfectly. Understanding the 721PE Connectivity

"Redsail RS720C"

Select the model (if "721PE" isn't listed, try or "Generic HPGL" ).

Troubleshooting Common 721PE Driver Issues