Printing Apparatus Displacement Member Stack Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing printing technologies face challenges in increasing print speed due to the need for the arm member to move away from the print medium after pressing, which disrupts the printing process and affects stack detection accuracy.
Innovation Solution
A printing apparatus with a displacement member that can be moved to an evacuation position during discharge, allowing for continuous detection of the stack amount without interfering with the printing process, enabling high-speed printing by optimizing the arm's position based on the stack height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the arm member moves away from the print medium after pressing for stack detection, then the stack amount can be detected, but the print speed decreases due to movement interruptions
Solution Approach 1:
The arm member is designed to dynamically change its position between a detection position (contacting the print medium) and an evacuation position (away from the print medium). This dynamic positioning allows the system to alternate between stack detection and continuous printing operations, resolving the contradiction by making the detection mechanism adaptive rather than static.
Solution Approach 2:
The arm member performs periodic movement between the detection position and evacuation position. During periodic detection cycles, the arm contacts the print medium to measure stack amount, then returns to the evacuation position to allow uninterrupted printing. This periodic action pattern enables both accurate detection and maintained print speed by separating these functions in time.
2Measurement precision
If the arm member remains in contact with the print medium during discharge, then continuous detection is possible, but it interferes with the printing process and reduces print speed
Solution Approach 1:
The arm member is extracted from the printing path by moving it to the evacuation position during the discharge phase. This separation removes the detection mechanism from the critical printing zone, eliminating interference with the printing process while maintaining the capability to perform detection when the arm is positioned at the detection point.
3Reliability
If the arm member presses the print medium for a specified time, then the print medium is properly uncured and detected, but the detection time increases and reduces overall printing efficiency
Solution Approach 1:
The arm member is positioned at the detection position in advance before the actual detection is needed. This preliminary positioning allows the arm to be ready for immediate contact with the print medium, reducing the overall detection time while ensuring reliable measurement when the detection cycle begins.
Data Source
AI summary
A printing apparatus includes a displacement member configured to be in contact with discharged print media and be displaced according to the amount of a stack of the print media, and detects the stack amount based on the displacement of the displacement member. The apparatus performs a first or second detection operation based on the detected stack amount. In the first detection operation, after a specified number of print media are discharged with the displacement member positioned at the evacuation position where it does not come into contact with a print medium, the displacement member is brought into contact with the print media to detect the stack amount. In the second detection operation, the stack amount is detected with the displacement member in contact with the print media.