This often indicates a baud rate mismatch on serial connections. Ensure the Windows COM port settings match the printer's hardware settings.
For installing the Epson TM-U220 Go to product viewer dialog for this item. Drivers Epson Tm U220 Windows 7 64 Bits
This article will walk you through everything: finding the right driver, installation methods (via USB, Serial, or Parallel), troubleshooting common errors, and optimizing performance. This often indicates a baud rate mismatch on