Movement control apparatus, printing apparatus, and movement control method
AssigneeCanon Kabushiki Kaisha
InventorShingo Tatsumi
Life of this patent
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Abstract
To control movement of a member to be driven by using a scale having a plurality of indices at a predetermined interval, and a sensor which is attached to the member to be driven along the scale and detects the indices, a time until the next index is detected is predicted on the basis of the output waveform of the sensor. Then, a signal concerning the current position of the member is generated on the basis of the predicted time. The current position of the member can be controlled with high precision even during acceleration/deceleration.
Claims7
A movement control apparatus comprising:
- a scale having a plurality of indices at a predetermined interval;
- a sensor which is attached to a member to be driven along said scale and detects the indices;
- prediction means for predicting, on the basis of an output waveform of said sensor, a time until a next index is detected;
- and
- position signal generation means for generating a signal concerning a current position of the member on the basis of the predicted time.
A printing apparatus comprising:
- a scale which is attached to a guide shaft and has a plurality of indices at a predetermined interval;
- a sensor which is attached to a carriage which supports a printing head to be driven along the guide shaft and detects the indices;
- prediction means for predicting, on the basis of an output waveform of said sensor, a time until a next index is detected;
- and
- position signal generation means for generating a signal concerning a current position of the carriage on the basis of the predicted time,
- wherein the printing head is driven based on the position generation signal to perform printing even in a region where the carriage is accelerated/decelerated.
A movement control method of controlling movement of a member to be driven by using a scale having a plurality of indices at a predetermined interval, and a sensor which is attached to the member to be driven along the scale and detects the indices, comprising the steps of:
- predicting, on the basis of an output waveform of the sensor, a time until a next index is detected;
- and
- generating a signal concerning a current position of the member on the basis of the predicted time.
Dependencies are inferred from the claim text.