Recording Apparatus Roller Eccentricity Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional recording apparatuses face challenges in accurately controlling the conveyance speed of recording media due to eccentricity of conveyance rollers and unclean conditions, leading to image quality deterioration.
Innovation Solution
A recording apparatus that includes a conveyance control method using a first signal generation unit to generate a first period signal based on the movement of the recording medium, a second signal generation unit to generate a second period signal based on the rotation of the roller, a correction unit to correct the first period signal when it falls outside a predetermined range, and a control unit to adjust the recording process based on variation information and the second period signal, thereby mitigating the effects of roller eccentricity and unclean conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rotary encoder is used to generate a period signal for conveyance control, then the recording speed and quality can be improved, but the system becomes sensitive to roller eccentricity and unclean conditions causing positional deviations
Solution Approach 1:
A correction unit is introduced as an intermediary between the period signal generation and the recording control. This correction unit detects positional deviations caused by roller eccentricity and unclean conditions, then generates correction signals to compensate for these deviations, thereby maintaining recording precision without being directly affected by the mechanical imperfections
Solution Approach 2:
The system implements feedback by continuously monitoring the period signal from the rotary encoder and comparing it against expected values. When deviations are detected due to roller eccentricity or contamination, the feedback mechanism adjusts the conveyance control parameters in real-time to maintain accurate recording positions
2Productivity
If the conveyance roller rotates at high speed to achieve high-speed recording, then productivity is improved, but positional accuracy deteriorates due to increased sensitivity to eccentricity
Solution Approach 1:
The system dynamically adjusts conveyance control parameters based on real-time detection of roller rotation characteristics. By making the control system adaptive rather than static, it can maintain positional accuracy across a range of rotation speeds, allowing high-speed operation without sacrificing precision
Solution Approach 2:
The correction unit changes control parameters dynamically based on detected deviations. When positional errors are detected due to roller eccentricity at high speeds, the system modifies timing and positioning parameters to compensate, thereby maintaining recording precision despite high-speed operation
Data Source
AI summary
A recording apparatus includes a recording unit configured to record an image on a recording medium, a roller configured to convey the recording medium, a first signal generation unit configured to generate a first period signal according to a movement of the recording medium, a second signal generation unit configured to generate a second period signal according to a rotation of the roller, a correction unit configured to correct the first period signal when a period value of the first period signal is outside a predetermined range, an information generation unit configured to generate variation information of a moving speed of the recording medium based on the first period signal, and a control unit configured to control recording on the recording medium based on the variation information and the second period signal.