An automatic polishing machine operates by using a rotating platen or wheel covered with abrasive materials. The metal sample is pressed against the platen, and as it rotates, the abrasive material removes material from the surface. The machine's automation features include automatic pressure application, sample movement, and sometimes even abrasive material changes.

Here's a breakdown of the process:

1. Sample Loading:The metal sample is placed onto the machine's holding fixture.
2. Pressure Application:The machine automatically applies a predetermined amount of pressure between the sample and the platen.
3. Rotation:The platen begins to rotate, causing the abrasive material to remove material from the metal surface.
4. Sample Movement:Some machines may also automatically move the sample across the platen to ensure even polishing.
5. Abrasive Material Change:For multi-stage polishing, the machine can automatically change to different abrasive materials to achieve the desired level of finish.
6. Polishing Completion:Once the desired level of finish is achieved, the machine stops and the polished sample is ready for examination.