If using a Serial/COM connection, ensure the baud rate matches (usually 9600 or 19200). The PC doesn't see the printer
Once the driver is installed, you need to tweak the settings for the best results. Ensure it is set to 80mm x 297mm or Roll Paper . Usbprint Printerpos-802bc2
You are likely using a 58mm driver or a standard Inkjet driver. Reinstall the POS-80 specific driver. If using a Serial/COM connection, ensure the baud
I can provide the specific or driver links once I know your setup! If using a Serial/COM connection