| 摘要 |
PURPOSE:To enable to arbitrarily set the leading angles of unbalanced weights and the moment caused by unbalaced weights by inputting the rotating position of the unbalanced weight mounted on a motor shaft to a microcomputer and controlling the motor to match to the instructed rotary position. CONSTITUTION:Unbalanced weights 4, 5 are fixed to the rotational shafts of motors 1, 2 which are fixed to a vibrator 11, and pulse generators 6, 7 which detect the rotating positions of the weights 4, 5 are provided. The motor 1 is connected to a commercial frequency power source 10, and the motor 2 is connected to a frequency converter 3. A microcomputer 8 inputs the pulses from the generators 6, 7, detects the leading angle of the rotating angle of the weight 5 with the rotating angle of the weight 4 as a reference, and a frequency converter 3 is controlled so that the angle becomes the angle instructed in advance. |
