| 摘要 |
PURPOSE:To drive a rotor without the influence of statical frictional resistance, by giving positive torque over the statical frictional resistance, and then by giving negative torque to the rotor to perform rotating drive and decelerating stop. CONSTITUTION:When a minute drive command value is given to a control section 1, the moving quantity is set to a moving register 4 and the moving end position is set to a moving stop position register 3. The moving quantity read out of the moving register 4 is given to an accelerating time table 10 and a decelerating time table 11, with which the accelerating time date and decelerating time data read out in proportion to the moving quantity are set to a timer 14 through a timer data changeover switch 12. The field of a lead phase against a rotor angle is thereby generated for a predetermined time, so that the positive torque over the statical frictional resistance is given to a rotor, with which the rotor is accelerated. After that, the field of a lag phase is given to stop the rotor. |
