Reconnect your cutting plotter to a USB port (preferably a USB 2.0 port, as USB 3.0 blue ports can sometimes cause data timing issues). Step 4: Configure the COM Port Settings
To find drivers for your RoHS cutting plotter 721 on Windows 10, you can try the following:
3. Device Manager Shows "PL2303TA Do Not Support Win 11/Win 10" (Code 10 Error)
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What or message appears in your Windows Device Manager?
Set the (typically 9600 or 19200 for these machines). Final Tips for Stable Performance
Right-click the "Unknown Device" or "USB2.0-Ser!" and select Update driver . Browse Computer: Choose "Browse my computer for drivers" . Reconnect your cutting plotter to a USB port
Before downloading software, you need to understand how the plotter communicates with your PC. The ROHS 721 typically features two types of ports on its side panel:
Setting up a RoHS 721 cutting plotter on Windows 10 comes down to treating the machine as a serial device rather than a modern USB plug-and-play device. By installing the correct or FTDI USB-to-Serial driver , locking down a low COM port number, and ensuring Hardware Flow Control is enabled, your 721 plotter will run reliably on Windows 10 for years to come.
While the physical cable plugging into your computer is a standard USB line, Windows 10 does not recognize the machine as a native USB printer. Instead, the driver emulates a legacy serial communication port (COM port). The most common chipsets used inside the ROHS 721 are: This link or copies made by others cannot be deleted
Change the Flow Control in Device Manager port settings from Hardware to Xon/Xoff , or vice versa. This regulates data buffering.
What is the shown in your Device Manager?