Stepper motor controlling apparatus and pen recorder
AssigneeYokogawa Electric Corporation
InventorsNaoyuki Harada, Hiroshi Otawa
Life of this patent
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Abstract
A stepper motor controlling apparatus has a driver which drives a stepper motor in response to an input pulse signal, a PWM controlling section which changes a duty ratio of the pulse signal fed to the driver to control a rotation of the stepper motor, a pulse encoder which rotates in response to the rotation of the stepper motor, and outputs a pulse according to a position of a moving object, a position counter which counts the pulse output from the pulse encoder to sense a present position of the moving object, and a pulse rate controlling section which controls an update latency time of the pulse signal according to a deviation between a target position of the moving object and the present position.
Claims13
A stepper motor controlling apparatus, comprising:
- a driver which drives a stepper motor in response to an input pulse signal;
- a PWM controlling section which changes a duty ratio of the pulse signal fed to the driver to control a rotation of the stepper motor;
- a pulse encoder which rotates in response to the rotation of the stepper motor, and outputs a pulse according to a position of a moving object;
- a position counter which counts the pulse output from the pulse encoder to sense a present position of the moving object;
- and
- a pulse rate controlling section which controls an update latency time of the pulse signal according to a deviation between a target position of the moving object and the present position.
A pen recorder, comprising:
- a driver which drives a stepper motor, which moves a pen, in response to an input pulse signal;
- a PWM controlling section which changes a duty ratio of the pulse signal fed to the driver to control a rotation of the stepper motor;
- a pulse encoder which rotates in response to the rotation of the stepper motor, and outputs a pulse according to a position of the pen;
- a position counter which counts the pulse output from the pulse encoder to sense a present position of the pen;
- and
- a pulse rate controlling section which controls an update latency time of the pulse signal according to a deviation between a target position of the pen in response to a magnitude of a measuring/recording signal and the present position.
Dependencies are inferred from the claim text.