Control apparatus for driving a pulse motor
AssigneeHitachi, Ltd.
InventorsYoshio Maeda, Koichi Matsumoto
Life of this patent
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Abstract
A control apparatus for driving a pulse motor which receives from a computer or the like a command signal indicative of the number of drive pulses to be applied to the pulse motor within a given time interval in order to drive the pulse motor at a given rotating speed produces, in response to the command signal, drive pulses equal in number to the commanded number within that time interval, preferably with uniform distribution, and drives the pulse motor in accordance with the drive pulses.
Claims10
A control apparatus for driving a pulse motor which is driven through a pulse motor driver to rotate by a predetermined physical angle with each of driving pulses being applied to said pulse motor driver, said control apparatus comprising:
- means for successively producing timing signals at controlled time intervals,
- a counter responsive to each of said timing signals for being set at a number relating to the number of driving pulses to be applied to said pulse motor driver during a time interval between occurrence of said each timing signal and occurrence of the next one,
- first means for receiving and holding until the occurrence of the next timing signal the number set in said counter,
- second means for producing pulses adapted to be used as the driving pulses at a frequency controlled on the basis of said number held in said first means,
- third means for applying the pulses produced by said second means to said counter to decrease the content thereof by one with each of said pulses, and
- gate means for permitting said pulses produced by said second means to be applied to said pulse motor driver only when the content of said counter is not zero.
A control apparatus for driving a pulse motor which is driven through a pulse motor driver to rotate by a predetermined physical angle with each of driving pulses being applied to the pulse motor driver, said control apparatus comprising:
- first means for successively producing timing signals at controlled time intervals,
- second means responsive to each of said timing signals to receive and store digital data indicative of the number of driving pulses to be applied to said pulse motor driver during a time interval between said successive timing signals, and
- third means for successively producing a selected number of driving pulses at a controlled frequency during said time interval, said selected number being equal to a number corresponding to said stored digital data and said frequency being determined such that said selected number of driving pulses are produced within said time interval.
Dependencies are inferred from the claim text.