| 摘要 |
PURPOSE:To improve forward and reverse starting characteristics by controlling exciting currents at the time of starting rotation so that the rising may be delayed for both forward and reverse rotation, at the recording section of a facsimile etc. CONSTITUTION:A microcomputer 1 reads out the data of every step from a data table in order, and sends outputs to phases A and B of a pulse motor 5 through a D/A converter 2 and drivers 3, 4. The magnitudes of currants to be outputted correspond to the data. And, the values of the data in the data table are between -63 and +63, the data are stored in order of addresses, and the magnitudes are shown by curves A, B. Namely, both curves have gentler rising compared to the sine-wave. For reverse rotation, curves symmetric to these are used. This method improves the rising characteristic of motor rotation. |
