What specific are you planning to use (e.g., SignMaster, ArtCut, Flexi)? Are you connecting via a USB cable or a 9-pin Serial cable ?
Go to → Right-click the Rohs 721 → Printer properties (or Device settings). Here you can change:
Because of this internal architecture, your PC requires a specific virtual COM port driver to recognize the USB connection. Without this driver, your computer will flag the plotter as an "Unknown Device," and your software will not be able to send cutting paths. Step 1: Identifying the Correct Driver Chip Rohs 721 Cutting Plotter Driver Pc
You should now see a clean entry, such as: CH340 USB-SERIAL (COM3) or USB Serial Port (COM4) .
9600 (or 4800 in some older models) Data Bits: 8 Parity: None Stop Bits: 1 What specific are you planning to use (e
Do not plug the USB cable into your computer yet. Installing the driver before connecting the hardware prevents Windows from assigning a generic, non-working "Unknown Device" driver to the port. Step 2: Download and Install the CH340 Driver
Once you identify the chipset, follow these steps to install the driver on your Windows PC. Method A: For the CH340 Chipset (Most Common) Here you can change: Because of this internal
For many users, automatic installation fails, especially on Windows 10 or 11. This often requires a manual process:
: Found in some variant builds of the 721 series. 2. Step-by-Step Driver Installation Guide