Recording Head Drive Limits for Foreign Matter Protection
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Solution Overview
Problem
In recording devices, foreign matter can enter between the recording head and the transport belt or platen, potentially damaging the recording head when it moves, especially during jam processing operations.
Innovation Solution
A recording device with a control section that stops the drive source when the drive force exceeds a limit value, defining different drive regions with varying limit values to manage movement directions and prevent damage from foreign matter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the recording head moves beyond the print adjustment range during jam processing, then the recording head can be separated from the transport belt for maintenance access, but foreign matter may enter between the recording head and transport belt causing damage
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the drive force limit values based on the drive region. The control section sets a first limit value when the recording head is in the first drive region (closer to transport belt) and a second limit value when in the second drive region (farther from transport belt). This parameter change prevents excessive drive force that could press foreign matter against the recording head, while still allowing the head to move beyond the print adjustment range for maintenance access.
2Object-affected harmful factors
If the drive force limit is set low to prevent damage from foreign matter, then the recording head is protected, but the recording head cannot move beyond the print adjustment range for maintenance operations
Solution Approach 1:
The patent applies segmentation by dividing the drive region into multiple sections: a first drive region where the recording head is closer to the transport belt and a second drive region where it is farther away. Each region has its own drive force limit value. This segmentation allows the system to enforce stricter limits when foreign matter damage is most likely (first region) while permitting greater movement freedom in the second region for maintenance operations.
Solution Approach 2:
The patent applies dynamics by making the drive force limit adaptive rather than fixed. The control section dynamically changes the limit value based on which drive region the recording head is currently in. This dynamic adjustment enables the system to balance protection needs with operational flexibility, allowing maintenance operations while preventing damage in critical zones.
3Manufacturing precision
If the recording head is moved toward the transport belt while foreign matter is present, then recording position adjustment is achieved, but the foreign matter presses strongly against the recording head causing damage
Solution Approach 1:
The patent applies preliminary action by preemptively limiting the drive force before the recording head can move into a position where foreign matter would cause damage. The control section monitors the drive region and applies appropriate limit values in advance, preventing the scenario where foreign matter gets pressed against the head during position adjustment.
Data Source
AI summary
A recording device includes a recording section configured to move with respect to a transport path, a facing section disposed facing the recording section with the transport path interposed therebetween, a movement unit configured to move the recording section, and a control section that is a control section configured to control a drive source of the movement unit and configured to, when the drive force of the drive source exceeds a limit value, stop the drive source. a drive region of the recording section includes a first drive region and a second drive region positioned at the first movement direction with respect to the first drive region and the limit value in the first drive region is smaller than the limit value in the second drive region.