Recording Device Control Unit Retracting Head During Abnormality
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Solution Overview
Problem
When an abnormality occurs in the conveyance system of a recording device, such as an inkjet printer, the recording medium may flex and interfere with the device, leading to defects in the inkjet head or conveyance system, and existing solutions often result in product waste by immediately stopping the operation.
Innovation Solution
A recording device is designed with a control unit that retracts the recording processing part to an area outside the medium-supporting part when an abnormality is detected, maintaining the original movement direction to prevent contact and minimize load changes, allowing for continued operation in certain cases of abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device stops operation immediately when an abnormality is detected in the conveyance system, then the recording processing part is protected from damage, but the in-process product is wasted
Solution Approach 1:
The control unit performs preliminary retraction of the recording processing part to a safe position before the abnormality can cause damage. By retracting the recording processing part in advance when an abnormality is detected, the system protects the recording processing part from potential damage while allowing the conveyance system to continue operating and complete the in-process recording task.
2Reliability
If the recording processing part is retracted suddenly when an abnormality occurs, then the recording processing part is protected from contact with the recording medium, but a large load is applied to the recording processing part conveyance system
Solution Approach 1:
The control unit initiates the retraction process in advance when an abnormality is detected, allowing the recording processing part to gradually move to a safe position rather than being abruptly stopped. This preliminary action cushions the load by distributing the stopping force over time, preventing sudden large loads on the conveyance system while still protecting the recording processing part from damage.
3Loss of time
If the recording processing part changes direction suddenly to retract, then it can reach a safe position faster, but a large load is applied to the conveyance system due to sudden direction change
Solution Approach 1:
The control unit detects abnormalities in advance and initiates the retraction process before the abnormality escalates. By performing the retraction action preliminarily and continuously in the current movement direction, the system achieves safe positioning efficiently without requiring sudden direction changes that would impose large loads on the conveyance system.
Data Source
AI summary
A recording device has a medium-supporting part that supports a long recording medium, a recording processing part that performs recording process on the recording medium supported by the medium-supporting part, a recording processing part conveyance system that moves the recording processing part, a medium conveyance system that includes a first drive roller, a first drive motor, a second drive roller and a second drive motor, and a control unit that controls the recording device. The control unit retracts the recording processing part to an area outside of the medium-supporting part while maintaining the movement direction of the recording processing part at a time at which an abnormality has occurred in an interval in which the recording processing is carried out on the recording medium while the recording processing part scans above the recording medium by the recording processing part conveyance system.