Dual-Encoder Workpiece Rotation Alignment in Paneling Machines
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Solution Overview
Problem
Current paneling machines face issues with relative movement and slippage of workpieces during rotation, leading to positioning errors and increased cycle times, particularly with large and heavy pieces, due to inadequate friction control and manual adjustments required to prevent slippage.
Innovation Solution
A workpiece rotation control system using dual rotary encoder devices for precise angular position measurement and comparison, allowing automatic detection and correction of slippage by adjusting the rotation of the workpiece to align with the intended position, thereby eliminating the need for manual re-centering and reducing cycle time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gripper holding force is increased to prevent slippage, then the workpiece positioning stability is improved, but the risk of damaging the workpiece surface increases
Solution Approach 1:
The system uses dual rotary encoder devices to continuously monitor the actual angular position of the workpiece and compares it with the intended position. When slippage is detected (position deviation), the control system automatically adjusts the rotation to correct the positioning error, eliminating the need to increase gripper holding force and thus preventing surface damage.
2Manufacturing precision
If manual re-centering is performed to correct positioning errors, then the workpiece positioning accuracy is improved, but the cycle time increases
Solution Approach 1:
The control system continuously monitors workpiece position using dual rotary encoders and automatically detects positioning errors. When slippage occurs, the system immediately commands a correction rotation to re-align the workpiece with the bending line, eliminating the need for manual re-centering operations and reducing cycle time.
Solution Approach 2:
The system performs self-correction of positioning errors through automatic detection and correction mechanisms. The dual encoder system and control algorithm work together to autonomously identify and remedy slippage conditions without operator intervention, maintaining high positioning accuracy while minimizing cycle time impact.
3Productivity
If high angular accelerations are used during rotation, then the productivity is improved, but the workpiece slippage increases due to overcoming friction effect
Solution Approach 1:
The dual rotary encoder system provides real-time feedback on workpiece position during rotation. The control system uses this feedback to detect any slippage that occurs during high-acceleration rotation and automatically corrects the positioning error, enabling high-speed rotation without compromising positioning reliability.
Data Source
AI summary
A workpiece rotation control system on a paneling machine (1) is described, comprising a rotator device (3) and which is served by a manipulator device (5) with a gripper (7) on a rotating axis (9) designed to arrange a workpiece of material to be machined on a rotating element (11) of this rotating device (3), which comprises first measuring means (13) of an angular position of the rotating axis (9) of the gripper (7) and the rotating device which comprises second means for measuring an angular position of the rotating element (11) of the rotating device (3), and processing means provided for comparatively comparing a value of an angular position measured by the first measuring means (13) with at least a value of an angular position measured by the second measuring means. A paneling machine comprising this system is also described.