Sheet Feeding Roller Speed Control for Interval Precision
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Solution Overview
Problem
Existing sheet feeding devices in image forming apparatuses face challenges in accurately adjusting sheet intervals due to variations in actual linear velocity caused by the rotational rate of the retard roller, leading to inefficiencies in productivity and power consumption.
Innovation Solution
A sheet feeding device equipped with a rotational speed detection system that calculates the actual linear velocity of the sheet based on the rotational rate of the retard roller and adjusts the sheet interval by accelerating the rotation of the sheet feeding roller, ensuring precise alignment and reduced power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sheet interval is decreased to secure productivity, then productivity is improved, but the linear velocity of the sheet must be kept low to save power
Solution Approach 1:
The system dynamically changes the rotational speed parameter of the sheet feeding roller based on detected sheet interval conditions. When sheet intervals are larger than the target, the rotational speed is increased to reduce intervals, and when intervals are smaller, speed is decreased, allowing optimization of both productivity and power consumption
2Manufacturing precision
If the rotation of the sheet feeding roller is accelerated to adjust sheet interval, then sheet interval adjustment is improved, but the actual linear velocity varies due to retard roller rotational rate
Solution Approach 1:
The system uses feedback from the rotational speed detection part to monitor the actual rotational speed of the sheet feeding roller and the rotational rate of the retard roller. This feedback information is used to calculate the actual linear velocity and adjust the acceleration timing and magnitude to compensate for variations, ensuring precise sheet interval control
Solution Approach 2:
The control part determines the acceleration timing in advance based on the detected sheet interval conditions and pre-calculated requirements. By planning the acceleration action beforehand and executing it at the determined timing, the system achieves precise sheet interval adjustment while accounting for the retard roller's rotational rate
Data Source
AI summary
A sheet feeding device includes a sheet feeding roller, a following roller, a rotational speed detection part, and a control part. The rotational speed detection part is configured to detect a rotational speed of the following roller. The control part is configured to accelerate a rotation of the sheet feeding roller and to adjust a sheet interval. The control part obtains a rotational rate of the following roller to the sheet feeding roller based on the rotational speed of the following roller, obtains an actual linear velocity of the sheet based on the rotational rate of the following roller and a theoretical linear velocity of the sheet after accelerating the rotation of the sheet feeding roller, and then adjusts the sheet interval based on the actual linear velocity of the sheet.