After the driver is installed, the device should appear as a "USB Serial Port (COM#)" in Device Manager without a warning icon. You may need to adjust the COM port number to between 3 and 9 for better software compatibility. Additionally, you'll need to match the communication settings (baud rate) in your cutting software with what your plotter expects (9600 is a common default).

Manufactured by WCH. Highly stable and widely supported on Windows 10.

: Modern cutting software like VinylMaster, SignMaster , or SignCut often come with pre-configured drivers for the 721 series, which are typically more stable than standalone manual installations. Machine Capabilities US Cutter MH 721 & SC2 Review

Configure COM port (for serial/USB-serial):

The RoHS Cutting Plotter 721 is a vinyl/craft plotter used for signmaking, apparel graphics, and precision cutting. Compatibility with Windows 10 depends on available drivers and communication method (USB, serial, or parallel). This report summarizes driver availability, installation steps, troubleshooting, and recommendations for ensuring reliable operation on Windows 10.

If you encounter issues during or after driver installation, try the following:

Change the connection type from "Direct USB" to .

9600 (or 4800 for older firmware) Data bits: 8 Parity: None Stop bits: 1 Flow control: Hardware (or Xon/Xoff if hardware fails) Click OK . Step 4: Map the Plotter in Your Cutting Software

Use a high-quality, shielded USB cable. Generic plotters are notoriously sensitive to electromagnetic interference.

However, because these machines are often manufactured by generic Original Equipment Manufacturers (OEMs) and comply with RoHS (Restriction of Hazardous Substances) standards, they rarely come with polished, automated software installers. Getting the RoHS 721 cutting plotter to communicate with a modern operating system like Windows 10 can be a frustrating experience.