| Problem | Cause | Solution | |---------|-------|----------| | Device shows USB Serial Converter but no COM port | Driver installed as WinUSB, not VCP | Reinstall with VCP driver (CH341/CP210x proper) | | Yellow exclamation Code 10 | Driver conflict or resource conflict | Uninstall device → Scan for hardware → Use different USB port | | Driver installs but cutting software no connection | Wrong COM port or baud rate | Check Device Manager COM number → change software COM port | | Plotter cuts mirrored or wrong size | USB driver correct but software config wrong | Set origin: bottom-left, correct page size in cutting software | | Works once, then disconnects after reboot | Windows fast startup | Disable Fast Startup in Power Options → Shutdown and restart | | Device cannot start (Code 31) | Driver signature blocked | Boot with disabled signature enforcement or switch to official signed driver (CH341SER v3.5+ is signed) |
She opened Device Manager. Under Other Devices , there it was: Redsail Plotter with a tiny yellow exclamation mark. Windows had no idea what to do with it. redsail cutting plotter usb driver install
If your assigned COM port number is higher than COM4 (e.g., COM12), some older vinyl cutting software might not recognize it. To change it, right-click the port in Device Manager -> Go to Properties -> Port Settings tab -> Advanced -> Change the COM Port Number to an open slot between COM1 and COM4. Step 5: Configure Your Cutting Software If your assigned COM port number is higher than COM4 (e