A: The easiest way is to connect your plotter to your computer and open Device Manager . Look for an unrecognized device or check under "Ports (COM & LPT)". Right-click it, go to Properties > Details > Hardware Ids. The VID/PID will tell you the chip manufacturer. Alternatively, the device might be listed as FT232R USB UART (for FTDI) or USB2.0-Serial (for CH341).

Right-click the unrecognized device and select . Choose Browse my computer for drivers .

This indicates a data communication error, usually meaning the driver is working, but the Baud Rate or Flow Control settings in the software do not match the machine's internal firmware.

If your download consists of a folder containing .inf and .sys files, you must install it manually:

Some driver packages contain only .inf and .sys files. These are the raw driver files. Install them by:

What are you using (Windows 10, 11, or Mac)?