Epson XP-640 AdjProg Definition – Epson XP-640 AdjProg or Epson XP-640 Adjustment Program or Epson XP-640 Adj Program, is a middleware developed by third-party software to supply for Epson XP-640 printer, making printer continuous printing without error. – Epson XP-640 Adjustment Program enables to perform maintenance and adjustment functions such as: Reset Waste Ink Pad […]