The original imported QATM double disc automatic metallographic polishing machine SAPHIR 250 A2-ECO from Germany has a working disc diameter of 200-250 mm. The new work disk assembly system, new control software, and all preparation methods can be edited and stored, and protected through user account management. Pressure, speed, and rotation direction can be adjusted. The TOPAS ECO dosing system can be selected for use, providing more flexible operation and convenience for sample preparation. The shockproof plastic inner cover adopts powder coated aluminum outer cover and high standard technology of the equipment, giving it the characteristics of quiet and smooth operation and better preparation results. Simple operation, easy installation and maintenance, making it an ideal automatic grinding and polishing equipment for metallographic laboratories.