M1040 centerless grinder circuit

This type of centerless grinder consists of five electric motors: grinding wheel, guide wheel, cooling, lubrication and hydraulic motors. Its circuit is as shown in the figure. Before starting the grinding wheel motor 1M, start the lubrication pump motor 3M first, so that the dynamic pressure bearing of the grinding wheel spindle is filled with lubricating oil. Use the oil return to make the float rise. Only when the flow relay KA contact is connected can the grinding wheel be started. Motor 1M. If the oil return disappears, it will automatically stop.