Movable Thermal Printer Ribbon Waste Reduction
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Solution Overview
Problem
Thermal printers face issues with ink ribbon waste and overlapping use marks when printing is interrupted, leading to inefficiencies in ribbon usage.
Innovation Solution
A printing system with a movable device, a control unit, and a ribbon transport unit that allows for precise control of the thermal head and ink ribbon movement, enabling resume printing from the exact stop position and resetting the ribbon position to minimize waste and overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printer stops movement in the width direction when a print stop instruction is received, then the ink ribbon is not used further in the width direction, but an unused area remains in the width direction of the ink ribbon causing waste
Solution Approach 1:
The system dynamically switches between two printing modes: width-direction reciprocation for normal operation and length-direction feeding for resume operation. This dynamic adaptability allows the system to maintain printing accuracy while minimizing ink ribbon waste after interruption
Solution Approach 2:
The control unit changes the operating parameters by detecting whether the interruption occurred during width-direction reciprocation or length-direction feeding, and accordingly selects the appropriate resume mode to prevent both accuracy loss and material waste
2Manufacturing precision
If the ink ribbon is fed by a predetermined amount when a print resume instruction is received, then the use marks of the ink ribbon do not overlap in the next printing, but an unused area remains causing waste
Solution Approach 1:
The control unit implements feedback by detecting the specific printing state at the time of interruption and using this information to determine the appropriate resume action, thereby preventing both position errors and unnecessary ink ribbon consumption
Solution Approach 2:
The system performs preliminary detection of the interruption state and pre-determines the resume mode before actual printing resumes, ensuring that the ink ribbon is positioned correctly without excessive feeding that would cause waste
3Productivity
If printing control uses the ink ribbon in the width direction to reduce unused areas, then the unused areas of the ink ribbon are consumed in a state of being reduced, but an unused area remains when printing is interrupted causing waste
Solution Approach 1:
The system dynamically adapts its printing mode based on operational state: using width-direction reciprocation during normal operation to maximize utilization, and switching to length-direction feeding upon interruption to prevent waste, thus achieving both high productivity and low material loss
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 system effectively suppresses ink ribbon waste and prevents overlapping use marks by resuming printing from the exact stop position and resetting the ribbon, ensuring efficient and continuous printing.
Implementation Method 1
a thermal head and a ribbon transport unit that is configured to transport an ink ribbon in a direction orthogonal to a moving direction of the movable printing device
Data Source
AI summary
A printing system includes: a movable printing device; a control unit; and a device moving unit that is configured to move the movable printing device, the movable printing device includes a thermal head and a ribbon transport unit, the control unit is configured to: execute print operation control including: device position control; ribbon transport control; and head print control; execute, when a print stop command is received, print stop control; execute, when a print resume command is received after a start of execution of the print stop control, the print resume control, and execute, when predetermined information is received after the start of execution of the print stop control, reset control of causing the device moving unit to move the movable printing device to a reference position, causing the ribbon transport unit to transport the ink ribbon by a predetermined amount and then restarting the print operation control.