Dynamic Printing Speed and Resolution Control for Thick Sheets
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Solution Overview
Problem
Existing printing apparatuses often fail to achieve high image quality when printing on certain types of sheets, such as thick or surface-treated sheets, due to limitations in printing speed and resolution, leading to suboptimal performance and potential reprints.
Innovation Solution
An image forming apparatus that dynamically switches between printing speeds and resolutions based on the type of sheet used, automatically setting a slower printing speed and higher resolution for sheets that cannot be printed at normal speed to ensure proper toner fixation and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printing speed is reduced to a low speed for printing on certain sheet types, then the toner fixation is improved, but the printing resolution remains low and the primary performance of the apparatus is not fully utilized
Solution Approach 1:
The control unit dynamically switches between normal speed and low speed printing modes based on the sheet type detected. For sheets requiring low speed (thick sheets, surface-treated sheets), the system activates low speed printing to ensure proper toner fixation. This dynamic adaptation resolves the contradiction by allowing the system to maintain high resolution capability while adjusting speed according to material requirements.
Solution Approach 2:
The system changes the printing parameter (speed) based on the sheet type. By detecting the sheet type and automatically adjusting the printing speed parameter, the system ensures that thick or surface-treated sheets receive the necessary low speed treatment for proper toner fixation, while other sheets can be printed at normal speed to maintain high throughput.
2Productivity
If the printing resolution is set to low resolution to enable normal speed printing with limited memory, then the printing speed is maintained, but the image quality does not meet user expectations
Solution Approach 1:
The control unit dynamically adjusts the printing resolution based on the detected sheet type. For sheets that require low speed printing (thick sheets, surface-treated sheets), the system automatically switches to high resolution printing mode. This dynamic parameter adjustment ensures that when the system operates at low speed, it delivers the high resolution output that users expect, thereby resolving the contradiction between speed and quality.
3Manufacturing precision
If the printing resolution is increased to high resolution when printing at low speed, then the image quality meets user expectations, but the printing time increases
Solution Approach 1:
The system changes both speed and resolution parameters based on sheet type detection. For sheets requiring low speed treatment, the system simultaneously activates low speed mode and high resolution mode. For standard sheets, it maintains normal speed and resolution settings. This coordinated parameter adjustment ensures high quality output only when necessary, minimizing the time penalty while meeting user expectations for image quality on specialized sheets.
Data Source
AI summary
If a sheet type of a sheet used for printing a print job is a predetermined sheet type (e.g., thick sheet) for which printing at a normal speed is impossible, a job control unit of an image forming apparatus sets the printing speed to a low speed and prints the print job with a printing resolution as high resolution.