Printing Device Cut Position Correction via Printed Scales
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Solution Overview
Problem
Existing printing devices face challenges in accurately aligning the set cut position with the actual cut position, especially when the cutting mechanism is inclined relative to the conveying direction of the print medium, leading to deviations in the cut position.
Innovation Solution
A printing device equipped with a conveying part, a printing part, a cutting part, a memory, and a controller, which prints scales on the medium to correct the cut position by calculating and adjusting the cutting timing based on the inclination of the cutting mechanism, ensuring accurate alignment of the set and actual cut positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cutting mechanism is inclined relative to the conveying direction, then the device structure can be simpler, but the cut position accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by printing scale patterns on the print medium before cutting occurs. These scales serve as reference markers that allow the system to pre-calculate and compensate for the inclined cutting path, enabling accurate cut positioning despite the mechanical inclination of the cutting mechanism.
Solution Approach 2:
The patent implements feedback by using the printed scales as reference markers to detect the actual cut position relative to the intended cut position. This feedback information is then fed back to the control system, which calculates correction values and adjusts the cutting timing to compensate for the inclination, thereby achieving accurate cut positioning.
2Manufacturing precision
If cut position correction is performed, then the cut position accuracy is improved, but the operation complexity increases
Solution Approach 1:
The patent applies self-service by enabling the system to automatically perform cut position correction using built-in scales and processing circuits. The system autonomously measures the deviation using the printed scales, calculates the correction value, and adjusts the cutting timing without requiring manual intervention or complex external correction mechanisms.
Solution Approach 2:
The patent replaces complex mechanical correction mechanisms with an information-based approach. Instead of using additional mechanical components to physically adjust the cutting path, the system uses printed optical scales and electronic processing to calculate and compensate for positioning errors through timing adjustments, simplifying the overall device structure.
Data Source
AI summary
A printing device includes: a conveying part configured to convey a printing medium in a conveying direction; a printing part configured to print on the printing medium at a print timing; a cutting part provided downstream of the printing part in the conveying direction and configured to cut the printing medium, which has been conveyed by the conveying part, at a cut timing after the printing part prints on the printing medium; and the controller configured to print, by controlling the printing part, a first scale and a second scale on the printing medium. At least a portion of the printed first scale and at least a portion of the printed second scale are arranged at the same position in the conveying direction. The printed first scale and the printed second scale are arranged at different positions in an orthogonal direction orthogonal to the conveying direction.