Robot Control Unit Speed Ratio Management
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Solution Overview
Problem
Existing robot systems lack efficient control mechanisms for reducing operation speeds in teach and test modes while maintaining consistent speed ratios with working operation modes, leading to complex operation management and increased teaching burdens.
Innovation Solution
A robot system with a control unit that receives driving speed or conveying speed in working operation mode and applies an override value to reduce the speeds of robot driving motors and conveying devices, ensuring consistent speed ratios across modes, thereby simplifying operation management and reducing teaching work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the robot operates in teach mode or test mode with reduced speeds, then the operation safety and teaching ease are improved, but the operation management complexity increases due to lack of consistent speed ratio control
Solution Approach 1:
The system dynamically adjusts the speeds of both the robot and conveying device based on the operational mode. In teach mode, both speeds are reduced while maintaining their original ratio, enabling safe teaching operations. In working mode, both operate at full speed. This dynamic adjustment resolves the contradiction by automatically adapting speeds to operational requirements without manual intervention.
Solution Approach 2:
The control unit changes the speed parameters of the robot and conveying device according to the operational mode. By receiving an override value and applying it to both devices proportionally, the system maintains consistent speed ratios while adjusting absolute speeds. This parameter change approach simplifies operation management compared to manual speed setting.
2Reliability
If the robot speed is reduced in teach mode, then the teaching safety is improved, but the conveying device speed must also be adjusted to maintain proper coordination
Solution Approach 1:
The control unit merges the speed control of the robot and conveying device into a single coordinated system. By applying the override value to both devices simultaneously and maintaining their speed ratio, the system ensures safe teaching operations without complex manual coordination. The merged control approach resolves the contradiction by automatically synchronizing speed adjustments.
Solution Approach 2:
The system uses feedback from the operational mode selection to automatically adjust both robot and conveying device speeds. The control unit receives the mode information and corresponding override value, then proportionally adjusts both speeds to maintain proper coordination. This feedback mechanism eliminates the need for manual speed matching while ensuring teaching safety.
3Productivity
If the robot operates at full speed in working mode, then the productivity is improved, but the teaching and testing require separate speed reduction mechanisms
Solution Approach 1:
The system dynamically switches between full speed operation in working mode and reduced speed operation in teach mode. The control unit receives an override value (typically 100% for working mode, lower for teach mode) and applies it to both robot and conveying device, maintaining their speed ratio. This dynamic switching enables high productivity during working operations while simplifying speed control compared to separate mechanisms.
Solution Approach 2:
The speed control system serves multiple functions: it controls both robot and conveying device speeds, adapts to different operational modes, and maintains proper speed ratios. By making the control unit universal and multi-functional, the system achieves high productivity in working mode while eliminating the need for separate speed reduction mechanisms for teaching and testing.
Data Source
AI summary
A robot system includes a conveying device, a robot, a control unit for controlling operation of the robot by transmitting a drive signal to a motor of the robot, and for outputting a driving speed control signal to the conveying device, and an encoder for detecting a conveying speed of the conveying device in a regular operation mode, where, when the robot is to be operated in a teach mode and a test mode, the control unit transmits a drive signal to the robot such that an operation speed is reduced by a received override value, and outputs the driving speed control signal such that the conveying speed of the conveying device is reduced by the override value.