The Qpol 300 A2-ECO is a double-wheel grinding and polishing machine for the metallographic laboratory, suitable for working wheels Ø 250/300 mm. The machine is conveniently operated by a 4.3″ touch screen. The new holder for the working wheel (single-disc design) enables metallographic sample preparation without carrier disc without compromising performance. The control software allows to edit and save up to 200 preparation methods, protected by a user account management. Pressure, speed and direction of rotation (head and working disc) are adjustable. A spin cycle function (Cleaning Boost) helps to spin dry the grinding and polishing medium at 750 rpm at the end of the preparation process within 3 seconds. The robust grinding and polishing machine can be combined with the dosing system Qdoser ECO or Qdoser ONE and offers maximum flexibility for sample preparation and operating convenience .