Basic structure of multi-head microcomputer combination
?The basic composition of the combination scale is: main vibration plate, main vibration machine, line vibration plate, line vibration machine, feed hopper, weighing hopper, chute, collection hopper, stepper motor, drive board, module conversion device, main control board.
??????The engineering name of the multi-head microcomputer combination scale is also called 'select combination weighing instrument'. It is composed of multiple weighing units with feeding and discharging structure. Using the principle of permutation and combination, the load of the weighing unit is automatically optimized for combination calculation, and the best weight combination close to the target weight value is obtained for packaging.
??????Multi-head microcomputer combination scales have many 'heads', which are actually 'weighing hoppers', which are divided into 8 hoppers, 10 hoppers, 12 hoppers, 14 hoppers, 16 hoppers, and 20 hoppers according to the types of hoppers commonly used in the food packaging industry today. , 24 buckets and so on. According to the type of use environment, it is also divided into waterproof type, anti-rust type, anti-collision type, and general type. It is used by food packaging, daily chemical, tobacco, and hardware (particles) industries. According to the shape, it is divided into double-opening door, large column type, double chute, low-noise single-opening door type. The elevator feeds through the feeding tray to concentrate the material on the main vibrating tray, and then through the vibration of the main vibrating tray, the material is evenly distributed on the main vibrating tray to the linear vibrating tray. When the material in the feeding tray is not or insufficiently detected by the material level photoelectric detector, it sends a signal to the main board, and then sends a feeding signal to the elevator through the main board to feed the material.
??????The linear vibration machine vibrates, and the materials are sent to each buffer hopper through the amplitude and the linear vibration feeding time. The stepper motor works, open the buffer hopper and send the material in the hopper to the weighing hopper. When the weighing hopper participating in the combination discharges or when the material in the weighing hopper is insufficient, the material in the buffer hopper will automatically flow into the weighing In the bucket. The material in the weighing hopper generates a weight signal through the sensor, which is processed into a digital signal by the AD module and transmitted to the main board of the intelligent control device through the data bus.
??????The CPU on the main board reads and records the weight of the weighing hopper, and then selects the multi-head microcomputer combination weighing hopper that is close to the target weight through calculation, analysis, combination, and screening, and sends out that the combination scale has weighed the materials and is ready to discharge signal. When the CPU receives the permission signal from the packaging machine, the CPU sends a command to start the driver to drive the stepper motor, open the selected weighing hopper, and discharge the material into the chute to enter the collection hopper. If there is no collecting hopper, it directly enters the packaging machine and sends a discharge signal to the packaging machine that has been discharged. After the weighing hopper unloads, the buffer hopper will replenish, weigh and combine the weighing hopper in time to prepare for the next unloading.