Epson's Automatic Head Maintenance is a feature available on a range of Photo PX models.
Automatic Head Maintenance is a self-check process for the print head that operates when the printer is first powered on or after a period of inactivity. If the print head nozzles are clogged, the printer will automatically and efficiently clean the print head. This is designed to prevent nozzles from clogging by keeping the ink system lubricated, ensuring that your printer achieves premium print quality at all times. This process will use ink from the cartridges.
Normally with this feature turned on you do not need to perform routine nozzle checks and print head cleaning functions. If you do run the Head Clean utility manually, it will use a variable amount of ink from all colours to clean the nozzles, with the amount used depending on the number of cleans you perform.
Depending on how often you use your product, you may want to turn the Automatic Head Maintenance feature on or off. For more information regarding the Auto Head Maintenance feature, see the user's guide for your printer: