| 摘要 |
PURPOSE:To improve accuracy, by computing a head correcting value at this time based on the value, which is obtained by multiplying the measuring error at the previous time by a predetermined constant, and the head correcting value at the previous time. CONSTITUTION:A comparing and controlling circuit 5 starts the driving of an electromagnetic feeder 3. Powder body 2 in a storing chopper 1 is put into a measuring hopper 6 at a high speed. When an input amount WR= an input objective value A1 is obtained, the comparing and controlling circuit 5 stops the electromagnetic feeder 3. When the first input is finished, a CPU 12 subtracts a preset measuring value A0 from an actual input value G1 at the previous time, and obtains a measuring error delta1. Then, the measuring error delta1 is multiplied by a constant K, a head correcting value epsilon1 at the previous time is added to this value, and a head correcting value epsilon2 at this time is obtained. The head correcting value epsilon2 at this time obtained in this way is subtracted from the preset measuring value A0, and an input objective value A2 at this time is obtained, and the value is fed to the comparing and controlling circuit 5. |
