: The CH341SER.EXE driver from WCH-IC is the official standard for these machines.
However, to unlock the full potential of your JK 721, it must be properly connected to your computer. That is where the comes in. jk 721 cutting plotter driver
If you're having trouble locating the driver, consider the following: : The CH341SER
Change your Baud Rate in both Device Manager and your software (switch between 9600 and 38400). Ensure your software is sending HP-GL commands, not DMPL. 3. Device Shows a Yellow Triangle in Device Manager If you're having trouble locating the driver, consider
Ensure the software is outputting in HP-GL or DMPL language. The JK 721 responds primarily to standard HP-GL vector coordinates.
Most users connect via USB. However, the JK 721 does not use a "plug-and-play" native USB protocol. Instead, it uses an internal serial-to-USB chip.
Are you using a specific like SignMaster or Artcut with your JK 721?