There are seven kinds of troubles in automatic quantitative powder packaging machine and their solutions

Automatic quantitative powder packaging machine has seven common failures and their solutions: 1 Can't start the automatic program First, check whether the discharge cylinder is closed, and whether the position sensor is loose and in place when the cylinder is closed The position sensor is actually a dry reed switch, which is closed and opened by the ring permanent magnet in the cylinder When the position of the sensor is not correct, the weakening of the permanent magnet in the cylinder will cause the signal out of control, and the automatic program will not start When adjusting the position of the sensor is invalid, emergency treatment can be done: short circuit the output line of the sensor, which does not affect the use in practice 2 The display value of weight display is unstable, sometimes good or bad First of all, the vibration phenomenon of the powder quantitative packaging machine should be eliminated Check whether the power supply voltage of + 5V system is stable and whether the body ground resistance meets the requirements 3 The cutting weight is unstable and the over tolerance is serious There is an oil storage cup in the triplet The air source drives the lubricating oil into each cylinder and reversing valve through the oil cup The main function of the triplet is to lubricate the cylinder block and strengthen the sealing performance When the oil way is blocked, it will cause the rubber gasket of the cylinder seal to dry grind with the cylinder body, resulting in damage, causing air cross, affecting the feeding stroke of each level of the cylinder Generally, it can work by replacing the two level rubber gasket of the main cylinder, but at the same time, the oil way should be dredged In addition, the triplet is also provided with an oil volume adjusting screw If the adjustment is too large, the lubricating oil will be discharged directly and wasted; if the adjustment is too small, it will not work The specific adjustment should be about one cup of oil every 7 days 4 A certain level of feeding process is missing in the feeding process When there is no feeding process of a certain level in the blanking process, the position of the main cylinder shall be observed carefully Q1, Q2, Q3 and electric reversing valve control the potential from the air source to the main cylinder respectively The corresponding reversing valve, Q1, Q2, Q3, shall be checked according to the fault phenomenon, and they are respectively responsible for the supply of air source in the feeding process of level I, II and III When replacing the reversing valve, turn its two working states to "0" After eliminating the cause of the reversing valve, the signal interface circuit is checked Each signal is output from the optocoupler to the control triode The parameters are bv > 60V, ZCM > 3a, PCM > 40W Darlington tube 5 Sugar leakage from hopper There is a direct relationship between the sugar leakage of hopper and the failure of discharging mechanism Clear the sugar accumulation in hopper, observe whether the discharging cylinder is in place and whether the closing valve has sugar accumulation If all of the above are normal, check whether the sealing of discharge cylinder is good There is a damping adjusting screw at the lower part of the cylinder When the air hole of the adjusting screw is blocked, the door closing delay will occur and sugar leakage will occur After opening the air hole, Zui's good adjustment method is: close the door in time, the response time should be short, and good damping should be ensured Otherwise, the excessive impact of the closing mechanism on the hopper will result in unstable digital display and quick wear of the manipulator 6 The bag clamping mechanism does not operate It indicates that the electric change-over valve does not work normally Under the normal air pressure of the air source, first check whether the coil voltage (24 V) of the change-over valve can be controlled If the electric change-over is normal, it means that the change-over valve is faulty and should be replaced If the change-over is not possible, the corresponding maintenance process is bag switch, change-over valve control triode and two-way trigger (CD4013) optocoupler 7 After the switch tube of the power supply part of the automatic quantitative powder packaging machine is damaged, three 7824 three terminal voltage stabilizing integrated blocks can be used in parallel to form a typical power supply The control pipe of 5 electric reversing valves of automatic quantitative powder packaging machine has limited heat dissipation conditions It is suggested to add an aluminum radiator When changing the reversing valve coil, a diode should also be welded to prevent the back EMF from breaking through the control tube The above is the sharing of seven kinds of faults frequently encountered in the automatic quantitative powder packaging machine and the handling methods I hope it will be helpful for you to use this equipment in the future