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US 5,998,956 AGranted
Recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Saito
Life of this patent
Estimating the term…
Abstract
A higher-performance, energy saving recording apparatus, having a stepping motor as a driving source, presumes an out-of-phase state of the stepping motor. Driving setting parameters of the stepping motor are changed when an out-of-phase state of the stepping motor is presumed.
Claims8
A recording apparatus having an open-loop controlled stepping motor as a driving source, comprising:
- presuming means for presuming an out-of-phase of the stepping motor in accordance with a using condition or a using environment of the stepping motor;
- a plurality of step tables which hold pulse rates corresponding to a plurality of print speeds, said plurality of step tables each having a different drive torque;
- and
- control means for controlling driving of the stepping motor using one of said plurality of step tables,
- wherein said control means selects one of said step tables having a drive torque that will not place the stepping motor out-of-phase when said presuming means presumes the out-of-phase of the stepping motor.
2 more elements
A recording apparatus for moving a recording head to attain recording scanning, said apparatus comprising:
- an open-loop controlled stepping motor for driving a carriage having the recording head;
- count means for counting a scanning number of the carriage;
- storage means for storing the scanning number of the carriage counted by said count means;
- a plurality of step tables which hold pulse rates corresponding to a plurality of print speeds, said plurality of step tables each having a different drive torque;
- holding means for holding at least one carriage scanning number threshold value;
- and
- control means for controlling driving of said stepping motor using one of said plurality of step tables,
- wherein said control means drives said stepping motor using a predetermined one of said plurality of step tables, counts the scanning number of the carriage using said count means and stores the scanning number in said storage means, compares the stored scanning number with the threshold value held by said holding means, and selects one of the step tables having a drive torque that will not place said stepping motor out-of-phase when the stored scanning number exceeds the threshold value held by said holding means and the out-of-phase is presumed.
5 more elements
A recording apparatus having an open-loop controlled stepping motor as a driving source, comprising:
- a sensor for detecting a temperature or a physical quantity corresponding to the temperature at a predetermined position of said recording apparatus;
- a plurality of step tables that hold pulse rates corresponding to a plurality of print speeds, said plurality of step tables each having a different drive torque;
- and
- control means for controlling driving of the stepping motor using one of said plurality of step tables,
- wherein said control means selects one of said step tables having a drive torque that will not place the stepping motor out-of-phase when said sensor detects a value from which the out-of-phase of the stepping motor is presumed.
2 more elements
Dependencies are inferred from the claim text.