Most Rohs 721 machines use one of two common USB-to-serial communication chips:
If it says or FT232 , you need the FTDI Virtual COM Port (VCP) driver. Step 2: Download the Official Drivers
Look for an entry named or USB Serial Port (COMx) , where "x" is a number (e.g., COM3).
Need further help? Join the Rohs Cutter User Group on Facebook or visit the SignMaster forums. Thousands of users share driver files and configuration tips daily.
is a generic model, you may need to select a "compatible" driver in your cutting software:
Found in premium variants, known for high stability on Windows 10 and Windows 11. Step 2: Download the Correct Driver
Choose the exact COM Port number you noted from the Device Manager. Port Communication Settings (Crucial for Data Flow):
For modern Windows systems, the RoHS 721 (often branded as Jinka, JK721, or MH721) typically requires a virtual COM port driver to function correctly through a USB connection.
Finding the correct driver for a Rohs 721 Cutting Plotter can be tricky, as these machines (often branded as JK721 or MH721) typically rely on a USB-to-Serial bridge driver rather than a standard printer driver USCutter Forum Essential Driver & Setup Guide The FTDI Driver
9600 (or 4800 in some older models) Data Bits: 8 Parity: None Stop Bits: 1
If you are encountering specific errors during setup, let me know:
Before plugging in your machine, you must download the driver corresponding to your hardware setup. Option A: The CH340 Driver (Most Common)
The is a popular, mid-range 28-inch (720mm) vinyl cutter widely used for creating signs, stickers, and custom apparel . To operate this machine on a PC, you must install specific drivers that allow your design software to communicate with the plotter via USB or Serial (COM) ports. Driver Installation Guide for Windows 10/11
Wait for the confirmation message stating "Driver install success."
This happens when another program has hijacked the assigned COM port, or the software is looking at the wrong index.