| 摘要 |
PURPOSE:To always maintain preferable characteristic by storing a plurality of speed data indicating the rotating speed of the motor, and reading the plurality of speed data on the basis of an asynchronous signal with the rotating phase of the motor. CONSTITUTION:When a switch 2 is closed, the winding amount of an anode foil 3 is stored in response to the setting states of switch groups 10, 11 in a CPU 1. On the other hand, the CPU 1 stores data for determining the rotating speed of a motor 5. When a predetermined amount of the foil 3 is fed, the CPU 1 reads necessary data from the plurality of data stored therein and supplies it through a D/A converter 8 to a motor driver 9 each time it receives a position pulse solely output from a foil encoder 7. In this case, data from the initial to the midway are so read as to be sequentially from the data of slow rotating speed to that of fast rotating speed. The remaining data are read in the reverse sequence. |
