Roll Media Recording Control for Take-Up Attachment Timing
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Solution Overview
Problem
Conventional recording apparatuses fail to determine whether a sheet is attached to the take-up apparatus, leading to potential interruptions in image recording and resulting print defects like color unevenness.
Innovation Solution
The recording apparatus includes a control unit that momentarily interrupts recording when the leading end of the medium is not attached to the take-up unit, and resumes recording once the leading end is securely attached, using a combination of mechanical and sensor-based detection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the leading end of the sheet is attached to the take-up apparatus before starting printing, then the sheet can be wound properly, but the leading end of the sheet is consumed wastefully and cannot be used for printing
Solution Approach 1:
The system performs preliminary detection of the sheet leading end position and preliminarily interrupts recording before the leading end reaches the take-up apparatus, allowing the leading end to be attached without being printed on, thus preventing waste while ensuring proper winding
2Loss of substance
If the leading end of the sheet is attached to the take-up apparatus while printing is being executed, then sheet waste is reduced, but the timing for attaching becomes critical and requires user skill
Solution Approach 1:
The control unit continuously monitors the position of the sheet leading end and provides feedback by interrupting recording at the appropriate timing, automatically guiding the user through the attachment process without requiring user judgment or skill
Solution Approach 2:
The system preliminarily interrupts recording before the leading end reaches the take-up apparatus, preparing the system in advance for the attachment operation and eliminating the need for user skill in timing the attachment
3Productivity
If printing operation continues without interruption, then productivity is maintained, but the timing for attaching the leading end becomes critical and may cause print defects
Solution Approach 1:
The control unit preliminarily interrupts recording at a timing before the leading end of the sheet reaches the take-up apparatus, preventing potential print defects while minimizing interruption time and maintaining overall productivity
Data Source
AI summary
Used is a recording apparatus recording an image onto a recording medium wound as a roll, including: a conveying unit which conveys the recording medium; a recording unit disposed along a conveying path and records an image onto the recording medium; a take-up unit which winds the recording medium; and a control unit which executes first control of momentarily interrupting recording after starting recording of the image without having a leading end of the recording medium attached to the take-up unit, with the leading end of a recorded image recorded on the recording medium having reached a predetermined position in the conveying path, and second control of continuing the recording when the leading end of the recorded image has reached the predetermined position, with the leading end of the recording medium being attached to the take-up unit.