On the Manipulation Protocol of Multihead Weigher and Its Resolution

Author: Smartweigh–Multihead Weighter

In the whole application process, the multihead weigher mainly performs continuous and accurate metrological verification on the raw materials according to the change of the net weight of the raw materials on the scale body. Its appearance will gradually replace the original electronic belt scales, spiral scales and even accumulative scales. As a metrological verification method, it has been widely used in metallurgy, mining, chemical plants and chemical fiber energy fields.

Operations and solutions in mechanical equipment are carried out by it. The control instrument will calculate the net weight elasticity coefficient per unit time of the scale body according to its data signal as the specific instantaneous total flow, and then compare it with the set total target total flow. After PID calculation, a 4-50mA current data signal will be output to change the output frequency of the feed motor soft starter.

In this way, the speed ratio of the motor can be changed to make the specific loading amount as close as possible to the set overall target total flow, so as to achieve the purpose of precise loading. If the multihead weigher performs PID control according to the data signal sent from its sensor, the net weight change sensed by the sensor will decrease within this time range, and then the frame drop operation of the data signal is prohibited. Therefore, replenishment is also set in the control instrument. Timing time, recorded at the beginning of gate valve closing. The feed motor runs at a fixed frequency during the feed start and the estimated feed time is completed, i.e. the multihead weigher runs at a fixed frequency throughout the process——static data manipulation——The frequency before feeding will remain unchanged.

There are many key reasons for jeopardizing the accuracy of mechanical equipment during operation, such as gas fluidity, such as cooling fans in production workshops, central air conditioning, and breeze blowing. , will endanger the automatic accuracy, the road surface will vibrate, because the production workshop is noisy, the equipment is running frequently, and even the uneven road surface of some production workshops will endanger the automatic accuracy.

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