【 CNC planer machine 】 What caused the plane slot machine hydraulic system pressure common faults: 1, the ratio of overflow valve solenoid coil have to electricity, ratio of electromagnetic coil voltage is conform to the provisions, such as described in the root cause, please check the electrical equipment. 2, inspection planing machine cartridge valve is stuck or the main valve core is stuck, and the damping is small round hole blockage, if root cause is stated, please remove the relief valve clean wash and loaded again. 3, three-phase power supply phase modulation, resulting in motor reverse it. Common fault 2: the slider turned quickly slow speed, stop too long time. 1, test tank oil level is too low, liquid mouth not flooded in, and fast forward when oil cylinder cavity on the liquid suction empty liquid is not enough. As described in the root cause of the oil tank can also be planer machine added to the liquid mouth around 5 mm above the charging hole completely submerged. 2, test fast forward rate is too fast, resulting in liquid enough. Such as root cause can reduce fast forward rate according to the change of system parameters. 3, prompt inspection charging valve is completely open, if only because of the oil pollution, make the liquid valve valve core theme block has the binding problem caused by liquid enough. Need to clean up the liquid valve is installed so that the valve core agile freely again. Common faults of three: the slider all return to normal, fast forward everything is normal, manual type can not slow down, folded plate didn't force planing machine. 1, inspection control liquid control oil & other Two cross & throughout; Directional control valve is normal work, if is the cause liquid valve has not turned off, the mouth cavity with liquid tank, can not be built. Cause all the valve can not work normally in the root cause is no electricity or stuck. 2, test the charging valve is stuck, nor, please clean up the liquid valve, packed again, to make the valve core spirit. Common fault 4: the slider return rate is too slow, high back pressure. Planing machine is the key to the common faults charging valve does not open, this problem is described with the common fault of three logical relationship, on the other hand, can be reference to the solution of the common faults of three methods for processing.