Liquid Discharging Apparatus Protrusion Position Detection
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Solution Overview
Problem
Liquid discharging apparatuses, such as ink jet type textile printing machines, face issues where the medium movement unit can become out of detection range, leading to prolonged waiting times and potential interference with the printing process due to its position relative to sensors and the apparatus body.
Innovation Solution
The apparatus includes a detected unit and a detector unit positioned to ensure the medium movement unit can be detected when it protrudes from the base unit, allowing for accurate positioning and preventing interference by using a control unit to execute detection operations based on specific instructions, such as power supply states and print start conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the medium movement unit is made movable to protrude from the apparatus body for cloth setting and removal, then ease of operation is improved, but reliability deteriorates due to potential loss of sensor detection capability
Solution Approach 1:
The patent applies preliminary action by detecting the medium movement unit's position at the protrusion position before initiating the printing operation. The detector unit checks whether the detected unit is within detection range in advance, and only if detection succeeds does the control unit proceed with printing. This ensures the medium movement unit is properly positioned before operation begins, preventing detection failures during printing while maintaining ease of operation.
2Ease of operation
If the medium movement unit is positioned at protrusion position for cloth setting, then ease of operation is improved, but loss of time increases due to waiting for position detection
Solution Approach 1:
The system performs position detection as a preliminary action before starting the printing operation. The control unit checks detection results in advance and only initiates printing when the medium movement unit is confirmed to be in the correct position. This approach minimizes waiting time by avoiding repeated detection attempts during the printing process, while still ensuring proper positioning for ease of operation.
3Measurement precision
If the detector unit and detected unit are disposed to detect at protrusion position, then measurement precision is improved, but device complexity increases due to additional positioning requirements
Solution Approach 1:
The patent applies local quality by positioning the detector unit and detected unit specifically at the protrusion position where the medium movement unit is most likely to be located during cloth setting and removal operations. This localized detection arrangement provides high measurement precision for the critical positioning scenario without requiring complex detection systems throughout the entire apparatus, thus balancing measurement precision with device complexity.
Data Source
AI summary
A liquid discharging apparatus includes a discharge unit capable of discharging a liquid to a discharge region, a medium movement unit capable of moving in movement directions while supporting a medium onto which the liquid is discharged, a base unit that constitutes a movement path along which the medium movement unit moves, a detected unit, and a detector unit capable of detecting a position of the medium movement unit by detecting the detected unit. The detected unit and the detector unit are disposed so that the detected unit is detected by the detector unit when the medium movement unit is at a protrusion position at which a one direction-side end portion of the medium movement unit which is at a one direction side in the movement directions protrudes more toward the one direction side than does a one direction-side end portion of the base unit.