Which are you using? (SignMaster, ArtCut, Flexi, etc.)
The driver only creates the connection; you still need cutting software to send designs: driver jinka 721 windows 10 64 bit exclusive
Are you receiving a on your software or plotter screen? Which are you using
Windows dynamically assigns COM ports. If you plug the Jinka 721 into a different USB port than before, Windows will assign it a new COM number. Always plug the machine into the exact same physical USB slot to maintain your software settings. To help me tailor any troubleshooting steps, tell me: Which are you using? (SignMaster