Print Media Conveyance Speed Control for Overlap Reduction
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Solution Overview
Problem
Uniformly increasing the conveying speed of a preceding print medium to cancel an overlap state in a printing apparatus can cause noise and increase power consumption in the driving system.
Innovation Solution
A printing apparatus employs a control unit to manage a speed difference between preceding and succeeding print media using reduction control, adjusting the conveying speed of the preceding print medium to reduce the overlap amount, thereby minimizing noise and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conveying speed of a preceding print medium is uniformly increased to cancel an overlap state, then the overlap state is canceled, but noise in the driving system increases and power consumption increases
Solution Approach 1:
The conveying speed of the preceding print medium is dynamically adjusted based on the detected position of the trailing end. The control unit sets the conveying speed to a first speed when the trailing end is in a first position and to a second speed when it is in a second position, enabling flexible speed control to cancel overlap while suppressing noise and power consumption increases
Solution Approach 2:
A detection unit detects the position of the trailing end of the preceding print medium, and the control unit adjusts the conveying speed based on this detected position information. This feedback mechanism enables precise control of the overlap state cancellation process while minimizing harmful effects
Data Source
AI summary
A printing apparatus includes a printing unit, first and second conveyance units conveying a print medium, and a control unit performing reduction control to reduce an overlap amount between a preceding print medium and a succeeding print medium by using a speed difference. In a first case in which a trailing end of the preceding print medium and a leading end of the succeeding print medium are positioned in an interval between the first and second conveyance units, a conveying speed of the preceding print medium is set to a first speed. In a second case which is different from the first case and in which the trailing end and the leading end are positioned in the interval between the first and second conveyance units, the conveying speed of the preceding print medium is set to a second speed different from the first speed.