The machine is designed for grinding/polishing bottom edge and 45 degree mite edge of flat glass. Four wheels work the bottom edge and four wheels work the miter edge at the same time. Both two edges have a very good finish. This is a high performance/price ratio machine. The four wheels for miter edge is fixed on the machine base, there is no vibration. Conveyor adopts chain transmitting system. Working speed is adjustable through speed regulator. Working speed and glass thickness appear on digital display.