Motor Control Parameter Optimization for Printing Apparatus Cogging
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Solution Overview
Problem
Existing printing technologies face challenges in quickly optimizing motor control parameters to suppress cogging-induced velocity fluctuations in printing apparatuses, requiring dedicated test operations that delay print operations and can affect print quality.
Innovation Solution
A printing apparatus with a measurement unit to monitor velocity fluctuations, a correction unit to adjust motor driving data, and a setting unit that dynamically determines and updates optimal parameter values for the correction data, allowing for continuous optimization during print operations without a separate test time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a dedicated test operation is performed to optimize motor control parameters, then the print quality is improved by suppressing cogging-induced velocity fluctuations, but the productivity deteriorates due to the additional time required before print operations can begin
Solution Approach 1:
The patent applies preliminary action by performing parameter optimization during the initial carriage movement to home position (which occurs anyway before printing) and during idle periods between print jobs. The measurement unit captures velocity fluctuation data during these predetermined movements, and the setting unit optimizes parameters without requiring separate dedicated test time, thus improving print quality while maintaining productivity
Solution Approach 2:
The patent implements continuity of useful action by continuously measuring velocity fluctuations and updating correction parameters during normal operation cycles (home positioning, idle periods). Rather than performing a single batch optimization that stops production, the system continuously refines parameters during useful operational periods, eliminating the trade-off between optimization time and productivity
2Productivity
If the test operation is executed parallel to the print operation, then the productivity is maintained, but the measurement precision deteriorates due to interference with print quality
Solution Approach 1:
The patent applies segmentation by separating the measurement function from the printing function. The measurement unit specifically measures velocity fluctuations during predetermined non-printing movements (home positioning), while the printing operation proceeds separately. This temporal and functional segmentation allows accurate measurement without interfering with print quality, while maintaining overall productivity
Data Source
AI summary
A printing apparatus according to the present invention comprises a carriage configured to mount a printhead and reciprocate, a driving unit configured to move the carriage, the driving unit including a motor as a driving source, a measurement unit configured to measure a velocity fluctuation of the carriage, a correction unit configured to correct driving of the motor by correction data to reduce a velocity fluctuation of the carriage arising from cogging of the motor, and a setting unit configured to set a parameter which defines a periodic fluctuation manner of the correction data. The setting unit determines a current preferable value of the parameter based on the velocity fluctuation measured by the measurement unit for a current set value of the parameter, and sets a next set value of the parameter from the determined preferable value.