Why does the polishing machine need to set the speed?

Because when everyone uses the polishing machine, they use different turntables and grinders. Use a coarse polishing disk such as a wool disk to increase the speed to easily wear through the polished part, so the speed is generally set at 800 to 1200/min. Similarly, if a coarser abrasive is used, the speed also needs to be lowered. In other cases, in order to improve the polishing quality, it needs to be carried out in different steps. Rough polishing and fine polishing are performed. The speeds of these two stages are different. Rough polishing requires a low rotation speed of the turntable, preferably not more than 600r/min; the polishing time should be longer than the time required to remove the scratches, because the deformed layer must be removed. After rough polishing, the grinding surface is smooth, but dull and dull, and there are even and fine wear scars observed under the microscope, which need to be eliminated by fine polishing. The speed of the turntable can be appropriately increased during the fine polishing, and the polishing time is appropriate to throw away the damaged layer of the rough polishing. That's roughly the reason for the above.