Paneling Machine Rotation Control for Workpiece Slippage Correction

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Solution Overview

Problem

Existing paneling machines experience relative movement and slippage between the workpiece and rotating elements during processing, leading to positioning errors and increased cycle times due to manual adjustments for slippage correction.

Innovation Solution

A workpiece rotation control system using dual rotary encoders to measure and correct angular errors by comparing the positions of the gripper and rotator, automatically identifying and correcting slippage without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the gripper holds the workpiece with high force to prevent slippage, then positioning accuracy is improved, but the risk of damaging the workpiece surface increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidsurface damage

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The system uses dual encoders to continuously monitor the actual angular position of the workpiece and compares it with the commanded position. When slippage is detected (position deviation exceeds threshold), the control system automatically compensates by adjusting the rotator position, eliminating the need for high gripper forces that could damage the workpiece surface.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces the mechanical friction-based holding system with an electronic control system using dual encoders and automated compensation. Instead of relying on friction from high gripper force, the system uses electronic sensing and automated position correction to maintain positioning accuracy without damaging the workpiece.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If manual re-centering is performed to correct slippage, then positioning accuracy is improved, but cycle time increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidcycle time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The system performs automatic self-correction of positioning errors through the dual encoder feedback mechanism. When slippage is detected, the control system automatically adjusts the rotator position without requiring manual intervention or stopping the cycle, thus maintaining positioning accuracy while minimizing cycle time impact.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The continuous feedback from dual encoders enables real-time detection and correction of positioning errors. The system monitors angular position throughout the cycle and automatically compensates for slippage, eliminating the need for manual re-centering operations that would extend cycle time.

Inventive Principle:

Principle #23Feedback

3Productivity

If high angular acceleration is used during rotation, then productivity is improved, but workpiece slippage increases

Engineering Contradiction:

Improverotation speedVSAvoidpositioning accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The dual encoder system provides continuous feedback on actual workpiece position during rotation. Even when high angular acceleration causes slippage, the system detects the position deviation and automatically compensates by adjusting the rotator position, allowing high rotation speeds to be maintained without sacrificing positioning accuracy.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces friction-based mechanical holding with an electronic control system that can accommodate high angular accelerations. The dual encoder feedback and automated compensation enable the system to maintain positioning accuracy even during rapid rotation that would traditionally cause slippage.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Object-affected harmful factors

If protective film is applied to the workpiece surface, then surface protection is improved, but friction between workpiece and gripper decreases causing slippage

Engineering Contradiction:

Improvesurface protectionVSAvoidpositioning accuracy

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The dual encoder feedback system continuously monitors workpiece position and detects slippage caused by reduced friction from protective film. The control system automatically compensates for the position deviation, allowing protective film to remain on the workpiece surface without causing positioning errors.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP4175774B1Paneling machine including a workpiece rotation control system

Publication Date: 2025.10.15 PRIMA IND

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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 15 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.