Even with the driver installed, your software (like ArtCut or Flexi) won’t work unless the Port settings match. Go back to .

By following these steps, your GoldCut JK Series should show up as a reliable plotting device, allowing you to get back to your vinyl projects without the "Cannot open port" errors.

GoldCut JK drivers often struggle with blue USB 3.0 ports. If the connection drops, try a black USB 2.0 port .

In your cutting software, ensure the following communication settings are applied: The same COM number you found in Device Manager. Baud Rate: 9600 (Standard for JK Series). Data Bits: 8. Parity: None. Stop Bits: 1. Flow Control: Hardware or Xon/Xoff. Troubleshooting Tips

Plug the cutter into your Windows 7 PC. Go to Start > Control Panel > Device Manager . Look under "Other Devices" or "Universal Serial Bus controllers." If you see a yellow exclamation mark next to "USB2.0-Serial," you likely need the CH341 driver. 2. Downloading the Driver

Often found in slightly newer or "Pro" versions of the JK series.

Since GoldCut doesn’t always have a centralized English website, you can usually find the correct drivers through: