| 摘要 |
PURPOSE:To obtain a position control device which causes no difference between a command position and a machine position at all times, by additionally providing a function for automatically correcting a delay between the command position and the machine position. CONSTITUTION:A position command pulse is inputted to a phase modulator 7, and from the modulator 7, a square wave of a constant period, which has been phase-modulated is outputted and is inputted to a phase discriminator 8. In the discriminator 8, phase error width of signals of a position detector 2 and the modulator 7 is detected, and it is inputted to a pulse train transducer 9. The transducer 9 converts a detection error to a pulse train, adds it as an error quantity pulse to a common pulse by a command adder 10, and a new command pulse containing an error portion of a command position and a machine position is led into a phase modulator 1. From the modulator 1, a square wave of a constant period is outputted, it rotates a driving motor 5 through a phase discriminator 3 and a driving amplifier 4, moves a moving base 6 of a hop board, and rotates the detector 2. When a control loop is constituted so that an output of the discriminator 8 becomes ''0'', the command pulse is inputted as it is to the modulator 1, and the command position coincides with the machine position. |
