Dynamic Buffer Velocity Control for Recording System Back Feeding
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Solution Overview
Problem
Existing recording systems face challenges in securing sufficient back feeding distance due to the need for increased buffer capacity, which leads to device upsizing, and require an efficient method to manage medium transport velocities during recording and non-recording periods.
Innovation Solution
A recording system with a first transport unit, a recording unit, a second transport unit, and a buffer unit, where the second transport unit operates at a lower velocity during non-recording periods to accumulate medium for back feeding, allowing for increased buffer capacity without physical upsizing, utilizing a control system to switch between transport modes based on recording status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the buffer capacity is increased to secure sufficient back feeding distance, then the back feeding distance is improved, but the device size increases
Solution Approach 1:
The patent applies dynamics by making the buffer capacity adjustable rather than fixed. The buffer capacity is dynamically changed based on whether the system is in a recording period or a non-recording period, allowing the same physical buffer to provide different effective capacities at different times without changing the physical device size.
Solution Approach 2:
The patent changes the operational parameters of the transport units based on the recording status. During non-recording periods, the second transport unit operates at a lower velocity to increase medium accumulation in the buffer, while during recording periods, it operates at higher velocity. This parameter change allows the buffer to effectively hold more medium without physical expansion.
2Productivity
If the second transport unit operates at high velocity continuously, then productivity is improved, but the buffer accumulation capacity is reduced
Solution Approach 1:
The patent implements periodic action by alternating the operational velocity of the second transport unit based on the recording schedule. During non-recording periods, the transport unit operates at low velocity to accumulate medium in the buffer. During recording periods, it switches to high velocity to maintain productivity. This periodic velocity change allows the system to achieve both high productivity and sufficient buffer accumulation.
Solution Approach 2:
The transport velocity of the second transport unit is made dynamic rather than static. The control unit adjusts the velocity based on the recording status, switching between low velocity during non-recording periods (to maximize buffer accumulation) and high velocity during recording periods (to maintain productivity). This dynamic adjustment resolves the contradiction between continuous high productivity and sufficient buffer capacity.
Data Source
AI summary
A recording system includes a first unit configured to transport a medium that is continuous, a recording unit configured to perform recording on the medium transported by the first unit, a second unit configured to transport the medium, a post-processing unit configured to perform predetermined post-processing on the medium transported by the second unit, and a buffer provided between the first unit and the second unit, the buffer being configured to accumulate the medium transported from the first unit and feed the medium to the second unit, wherein in a recording period in which the recording unit performs the recording on the medium, the second unit transports the medium at a first velocity, and in a non-recording period that is after the recording period and in which the recording unit does not perform the recording on the medium.