Barcode not printing clearly

If your barcode is not printing clearly, the source file wasn't created in the ideal quality. 

Try this sample label which was generated at the correct quality to test it: Sample Label

If there's no difference or improvement with the print result, you will need adjust your printer settings.

On PC: 

Go to Control Panel > Devices and Printers > Right click on Label Printer > Printer Preferences > Settings Tab 

Adjust Speed and Density 

On Mac:

Access these settings directly from the print menu as shown below.