Except putting on the bag manually, the machine is automatically controlled for fast/slow feeding, quantitative feeding, bag clamping and discharging. The instrument can realize the setting of control parameters for fast and slow feeding and overload alarm display; the weight can be accumulated and can be printed automatically. The feeding machine is also featured by fast weighing speed, high accuracy, fine stability and easy operating etc.
After starting the control program of the PC Controlled Quantitative bagging machine, the feeding belt runs fast, the flow control gate is at the fast feeding position, the material weight in the scale hopper is converted by a load sensor to an analog voltage signal, which is then amplified and given to the intelligent weighing instrument to carry out A/D conversion, and fast sampling is carried out by the central processing unit (CPU), finally processed and calculated through digital filtering. When the material weight reaches the first primary value (the preset value — SP2), a command is given out, thus the feeding belt runs slowly, and the flow gate shifts to the slow feeding position. When the material weight reaches to the second rated value (the preset value — Pr), the belt feeder is closed and the material cut-off gate is closed. If bag-clamping signal has been received, the scale gate is opened to start feeding and bagging and bag removing, then the bags full of stuffs are sent by the product conveyor to the bag sewing machine to be sealed and then sent out; otherwise, it needs to wait for bag clamping and holding. And the operation process is thus circulated till the machine is stopped.
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