Without the correct CH340 driver, Windows will label the device as "Unknown USB Device," and the plotter will never receive data.
The "Rohs" designation often confuses users. While "RoHS" usually stands for Restriction of Hazardous Substances (an environmental standard), in the context of this plotter, it is frequently used as a brand or model prefix. The is commonly a rebranded version of Chinese plotters like the GCC, Puma, or Liyu models. Rohs 721 Cutting Plotter Driver Pc
These all use the same CH340 logic board. The physical "Rohs" sticker refers to the material safety (Restriction of Hazardous Substances) certification, not the brand of the electronics. Without the correct CH340 driver, Windows will label