Printing System Transport Control for Post-Processing Quality
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Solution Overview
Problem
In printing factories, the lack of real-time control over the transportation of printed matter can lead to incomplete processing, resulting in defective products due to insufficient printed material during post-processing steps.
Innovation Solution
A printing system that includes a printing device, a transport device, and a post-processing device, controlled by a unit that monitors the transport situation to manage the output and processing, allowing for controlled start times, capacity management, and order optimization to prevent overloading and ensure complete transport before processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the printing device continuously outputs printed matter without considering transport capacity, then productivity is improved, but the transport device becomes overloaded and post-processing cannot be performed
Solution Approach 1:
The control unit receives feedback information from the transport device about its current load status and uses this feedback to control the printing device's output. When the transport device approaches its load capacity, the control unit reduces or pauses printing output, ensuring the transport device remains within acceptable load limits while maintaining overall productivity.
Solution Approach 2:
The system dynamically adjusts the printing output rate based on real-time transport device conditions. The control unit modifies printing parameters (such as output speed or batch size) according to the current state of the transport device, transforming a static printing process into a dynamic one that adapts to transport capacity constraints.
2Productivity
If the transport device capacity is increased to handle more printed matter, then productivity is improved, but the device complexity increases
Solution Approach 1:
The transport device is divided into multiple independent transport units or batches. Instead of increasing the capacity of a single complex transport system, the system segments the transport function into multiple simpler units that can operate independently, reducing overall device complexity while maintaining total transport capacity.
Solution Approach 2:
The system allows temporary excessive action by permitting the transport device to operate slightly beyond its nominal capacity for short periods, then corrects the imbalance. This approach avoids the need for continuously oversized complex transport infrastructure while still meeting productivity requirements.
3Productivity
If post-processing starts before all printed matter is transported, then productivity is improved, but defective products are produced due to insufficient material
Solution Approach 1:
The control unit performs preliminary assessment before allowing post-processing to start. It evaluates the current transport status and predicts whether sufficient printed matter will be available for post-processing. Only when the assessment confirms adequate material availability does the control unit permit post-processing to begin, preventing defective products while maintaining productivity.
Solution Approach 2:
The system uses feedback from the transport device about the quantity and status of printed matter to control when post-processing can start. The control unit continuously monitors transport progress and uses this feedback to make real-time decisions about post-processing initiation, ensuring only sufficient material is processed.
Data Source
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AI summary
A printing system includes a printing device that performs printing on the basis of a given instruction and outputs a printed matter, a transport device that transports the printed matter output by the printing device, a post-processing device that performs post-processing on the printed matter transported by the transport device, and a control unit that grasps a transport situation of the transport device and controls a process in the post-processing device from the grasped transport situation.