Inkjet Printer Suction Table Control for Variable Medium Holding
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Solution Overview
Problem
The existing inkjet printer's suction force generation is inadequate as it is affected by medium thickness, area, temperature, and humidity, and cannot be accurately controlled by rotating a fan at a constant speed.
Innovation Solution
A medium holding device with a suction force generator and a controller that adjusts the suction force in a step-wise manner based on detected actual suction force, suction time, and processing mode, ensuring optimal suction force maintenance while preventing excessive weakening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fan is rotated at a constant speed determined according to required suction force, then the suction force generator can generate suction force, but the suction force cannot be appropriately optimized because it is affected by medium thickness, area, temperature, and humidity
Solution Approach 1:
The fan rotation speed is changed from constant to variable based on actual suction force feedback. The controller dynamically adjusts the rotation speed according to detected actual suction force values, enabling the system to adapt to different medium conditions (thickness, area, temperature, humidity) and optimize suction force generation for each specific case
Solution Approach 2:
A suction force detector is introduced to detect the actual suction force generated by the suction force generator. The detected actual suction force is fed back to the controller, which then adjusts the fan rotation speed accordingly. This closed-loop feedback mechanism enables continuous optimization of suction force to match actual medium holding requirements
2Reliability
If the suction force is increased to ensure medium holding, then the medium can be reliably held on the table, but excessive suction force causes noise and pattern distortion
Solution Approach 1:
The suction force detector provides real-time feedback on actual suction force levels. The controller uses this feedback to adjust the fan speed, reducing it when the actual suction force exceeds what is needed for medium holding. This prevents excessive suction force from causing noise and pattern distortion while maintaining reliable medium holding
Solution Approach 2:
The system dynamically changes the fan rotation speed parameter based on detected actual suction force conditions. By adjusting this parameter in real-time, the system maintains the minimum necessary suction force for reliable medium holding while avoiding excessive suction force that would generate noise and pattern distortion
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
The solution optimizes suction force generation, maintaining medium hold on the table without excessive noise or pattern distortion, ensuring reliable printing performance.
Implementation Method 1
a suction force generator that generates a suction force through a through hole formed in the placement surface
Data Source
AI summary
The disclosure optimizes suction force. An inkjet printing apparatus (1) includes a suction table (2) having a placement surface (21a) for the medium (M); a blower (52) that generates a suction force on the placement surface (21a); and a control device (55) that controls a suction force generated by the blower (52). The control device (55) includes a switcher (553) that switches the suction force to generate, where when the medium (M) is placed on the placement surface (21a), the switcher (553) drives the blower (52) at a first output level to generate a first suction force, and suctions the medium (M) placed on the placement surface (21a). Thereafter, the blower (52) is driven at the second output level lower than the first output level to generate the second suction force weaker than the first suction force, thereby suctioning the medium M placed on the placement surface (21a).