Toner Bottle Speed Control via Feedback Sensor
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Solution Overview
Problem
Existing image forming apparatuses face challenges in precisely controlling the amount of toner discharged from a container, requiring high precision in rotational speed control to maintain consistent toner supply and prevent variations in print density.
Innovation Solution
The apparatus incorporates a rotation detection sensor and a feedback-controlled DC motor to stabilize the rotational speed of the toner bottle, ensuring precise toner discharge by adjusting the PWM setting value based on real-time measurements and sensor feedback, thereby maintaining consistent toner supply and preventing print density variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rotational speed control is implemented to control toner discharge amount, then toner supply precision is improved, but control system complexity increases
Solution Approach 1:
The patent implements feedback control by detecting the actual rotational speed of the toner bottle and comparing it with the target rotational speed. The control unit adjusts the drive signal based on the speed difference to maintain precise rotational control. This feedback mechanism enables accurate toner discharge control without requiring overly complex mechanical control systems.
Solution Approach 2:
The patent replaces complex mechanical rotational speed control mechanisms with an electrical control system. By using a motor driven by controllable drive signals and regulated through electrical feedback, the system achieves precise rotational control without the mechanical complexity of traditional speed regulation mechanisms.
2Productivity
If rotational speed varies, then toner discharge amount changes, but print density consistency deteriorates
Solution Approach 1:
The control unit continuously monitors the rotational speed of the toner bottle and adjusts the drive signal in real-time to maintain the target rotational speed. This feedback control ensures that the toner discharge amount remains consistent even when load conditions change, thereby maintaining uniform print density across the entire printing process.
Solution Approach 2:
The patent implements dynamic rotational speed regulation that adapts to changing operating conditions. The control system continuously adjusts the motor drive based on actual speed feedback, enabling the system to maintain optimal rotational speed and consistent toner discharge throughout the printing process, ensuring uniform print density.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for high-precision control of toner discharge, reducing rotational speed fluctuations and maintaining consistent print quality by stabilizing the rotational speed of the toner bottle, thus ensuring accurate toner supply and preventing significant changes in print density.
Implementation Method 1
a rotation detection sensor and a feedback-controlled DC motor to stabilize the rotational speed of the toner bottle
Implementation Method 2
a feedback-controlled DC motor to stabilize the rotational speed of the toner bottle, ensuring precise toner discharge by adjusting the PWM setting value based on real-time measurements and sensor feedback
Data Source
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Figure 3A~3B
AI summary
An image forming apparatus includes developing unit for developing using toner electrostatic latent image respectively formed on photosensitive member, a mounting unit to which a container T is mounted, the container including a containing unit for containing toner and a pump unit, and performing a supplying operation for supplying toner by expansion and contraction of the pump unit, a driving unit for rotationally driving the container to cause the container to perform the supplying operation, and a controller for controlling a rotational speed of the container based on a time for which the supplying operation has been performed.