Label Printing Device Warping Prevention
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Solution Overview
Problem
In label printing devices, when a mountless label is left unissued for a predetermined time, the portion wound on the shaft can warp, leading to a risk of device abnormality such as the label getting stuck to the cutting blade or not being conveyed smoothly, causing operational issues.
Innovation Solution
A preparatory operation mode is executed by the controller, where the label is conveyed a predetermined distance longer than the length from the shaft to the cutting unit and cut, preventing the warped portion from causing device abnormalities, and a label detection sensor ensures the label is removed to avoid interference during new label issuance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the label is left unissued for a predetermined time, then the warped portion is formed on the shaft portion, but this causes the label to get stuck to the cutting blade or be caught during conveyance
Solution Approach 1:
The system performs a preliminary conveyance operation before normal cutting and issuance. When the label remains unissued for a predetermined time, the controller executes a preparatory operation that conveys the label a longer distance to reposition the warped portion away from the cutting blade area, preventing potential sticking or catching issues during subsequent operations
2Reliability
If the label is conveyed a longer distance in preparatory operation mode, then the warped portion is removed from the cutting area, but this increases the operation time
Solution Approach 1:
The system implements periodic monitoring of label issuance timing and conditionally executes preparatory operations only when needed. The controller determines whether a label has been unissued for a predetermined time and only then performs the extended conveyance operation, avoiding unnecessary time consumption during normal operations while maintaining reliability when required
Data Source
AI summary
A label printing device includes: a conveying unit configured to convey a mountless label; a shaft portion configured to change a conveying direction of the mountless label; a cutting unit configured to cut the mountless label of which the conveying direction is changed by the shaft portion and issue a label; and a controller configured to control the conveying unit and the cutting unit. The controller executes a preparatory operation mode in which the mountless label is conveyed a predetermined distance longer than a length of a portion extending from the shaft portion to the cutting unit in the mountless label by the conveying unit and is cut by the cutting unit when a label is not issued for more than a predetermined time.