Printer Controller Adaptive Temperature Suppression
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Solution Overview
Problem
The frequent operation of motors in printing apparatuses leads to excessive temperature rise, necessitating intermittent printing to control temperature, but this results in increased frequency of temperature suppression processing even when the temperature rise is minimal, especially when print rates exceed predetermined levels.
Innovation Solution
A printing apparatus with a controller that adjusts the frequency and timing of temperature-rise suppression processing based on print rates, reducing unnecessary operations by continuing motor drive when print intervals are shorter than sheet conveyance time and modifying indicator changes to delay or reduce temperature suppression actions when print rates exceed reference numbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If intermittent printing is performed to suppress temperature rise when number of printings exceeds predetermined number, then temperature in apparatus is lowered, but frequency of temperature suppression processing increases unnecessarily when print rate is high
Solution Approach 1:
The patent applies dynamics by making the temperature suppression processing frequency adaptive rather than fixed. The controller dynamically adjusts the execution frequency of temperature suppression processing based on the actual print rate (number of printings per unit time). When print rate is high and motor operates continuously, the processing frequency is reduced appropriately, while when print rate is low and motor operates intermittently, the processing frequency is increased to effectively suppress temperature rise. This dynamic adjustment resolves the contradiction by optimizing processing frequency according to actual operating conditions.
Solution Approach 2:
The patent changes the parameter of processing execution frequency based on print rate conditions. The controller monitors the number of printings per unit time and adjusts the frequency of temperature suppression processing accordingly. When the print rate exceeds a reference value indicating continuous motor operation, the processing frequency is reduced; when the print rate is below the reference value indicating intermittent motor operation, the processing frequency is increased. This parameter change approach allows the system to maintain effective temperature control while avoiding excessive processing frequency during high-productivity periods.
2Productivity
If number of printings per unit time is increased, then productivity is improved, but temperature in apparatus rises more frequently
Solution Approach 1:
The patent implements feedback control by continuously monitoring the print rate (number of printings per unit time) and using this information to adjust the frequency of temperature suppression processing. The controller receives feedback about the actual printing workload and adjusts the cooling/temperature suppression actions accordingly. When high print rates are detected, the system responds by reducing unnecessary processing frequency while maintaining adequate temperature control, thus allowing sustained high productivity without excessive temperature rise.
Data Source
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AI summary
A printing apparatus, including: a conveyor (30) configured to convey a sheet along a conveyance path; a driving device (37) configured to drive the conveyor (30); a printing device (40) configured to print an image on the sheet conveyed by the conveyor (30); and a controller (80) configured to execute: a printing processing in which the controller controls the driving device and printing device such that the number of printings per unit time is changed in a state in which the conveyor is driven at a predetermined speed; a first processing in which, when a first indicator reaches a preset first value, the controller suppresses rise of a temperature in the printing apparatus, wherein the first indicator is a value that changes based on an increase in the number of sheets printed within a set specific period in the printing processing; and a second processing in which the controller reduces frequency of execution of the first processing per unit number of printings when the number of printings performed within the set specific period in the printing processing is equal to or greater than a set reference number.