The RoHS 721 typically uses or DMPL command languages. Popular software choices include: Software for JinKa JK-721 plotter - PlotCalc

Run the installer before plugging in the plotter.

Right-click the device > > Port Settings > Advanced .

Most 721 series plotters do not have a "true" USB interface. Instead, they contain an internal USB-to-Serial chip. To make your PC recognise the device, you must install one of the following virtual COM port drivers: Common for high-quality serial conversions.

Setting up a on Windows 10 can be tricky because many Chinese-manufactured models use older USB-to-Serial technology that requires specific virtual COM port drivers. Essential Driver Requirements

You can typically download these from Driver Scape or official support portals like USCutter .

Ensure the is set between 1 and 4 . Numbers higher than 10 often cause communication errors in cutting software. Compatible Software for the 721 Plotter

Plug the USB cable into a rear port of your PC (rear ports provide more stable power) and turn the plotter on. Verify in Device Manager: Right-click the Start button and select Device Manager .