Novel metallographic sample polishing machine

The invention discloses a novel metallographic sample polishing machine and belongs to the field of polishing machines. The novel metallographic sample polishing machine comprises a polishing machine power head body which comprises a gearbox. Gears which are equal in size are installed in the gearbox and include the driving gear and the driven gear. The shaft of the driving gear is provided with a stepping motor through a coupler. The driven gear is fixedly provided with a nut. A lead screw provided an inner spline is installed in the center shaft of the driven gear. The novel metallographic sample polishing machine has the beneficial effects that when a sample is polished through the novel metallographic sample polishing machine, it is ensured that all points of the surface of a workpiece and the surface of a polishing tool have the cut conditions and cutting conditions which are the same or similar by arranging a polishing movement track, the polishing precision is high, movement is stable, work is reliable, servo performance is good, and the automation degree is high.