CNC Workpiece Weight Measurement via Driving Module Electrical Signal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional CNC machining processes face challenges in achieving optimal servo-control and surface precision due to the difficulty in real-time weight measurement of workpieces during machining, leading to errors between actual and predicted contours.
Innovation Solution
An apparatus and method that measure the weight of a CNC workpiece by detecting the magnitude of an electrical signal driving a loading platform in constant speed, using a calibration curve database to derive the weight and adjust control parameters for enhanced precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional weighing scale is used to measure workpiece weight, then weight measurement can be obtained, but real-time weight detection during machining cannot be achieved
Solution Approach 1:
The weighing function is merged with the CNC machine tool by integrating a loading platform that serves dual purposes: supporting the workpiece during machining and measuring its weight through electrical signal detection from the driving module, eliminating the need for separate weighing operations
Solution Approach 2:
The traditional mechanical weighing scale is replaced by an electrical detection system that measures workpiece weight through the electrical signal magnitude required to drive the loading platform at constant speed, enabling non-contact, real-time weight measurement during machining
2Device complexity
If fixed control parameters are used in CNC machine tool, then device complexity is reduced, but servo-control accuracy for various machining applications deteriorates
Solution Approach 1:
The control parameters are transformed from fixed static values to dynamic adjustable parameters that automatically adapt to different workpiece weights and machining conditions, allowing the CNC system to optimize servo-control performance for each specific application without increasing operational complexity
Solution Approach 2:
The system implements automatic feedback control by detecting workpiece weight through electrical signals and using this information to dynamically adjust control parameters, ensuring optimal servo-control accuracy for varying machining conditions without requiring manual intervention
3Measurement precision
If manual weight entry is required, then measurement capability is maintained, but human operation complexity increases
Solution Approach 1:
The CNC machine tool performs self-measurement of workpiece weight through the integrated electrical signal detection system, automatically obtaining weight data without requiring operator intervention for manual weighing or data entry, thereby simplifying operations while maintaining measurement capability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for real-time weight measurement, reducing human operation complexity, enhancing servo-control precision, and minimizing tracking errors, thereby improving machining accuracy and efficiency.
Implementation Method 1
The weight of the workpiece being machined is derived by determining the magnitude of an electrical signal received by a driving module that drives a loading platform in constant speed
Data Source
AI summary
This invention discloses a method and apparatus for measuring the weight of a CNC workpiece. As the weight of the workpiece on a loading platform increases, the loading of a driving module which drives the loading platform in constant speed increases accordingly. On the contrary, as the weight of the workpiece on the loading platform decreases, the loading of the driving module which drives the loading platform in constant speed also decreases. This invention determines the weight of the workpiece on the loading platform by measuring the electrical signal which drives the driving module and utilizing a calibration curve data in a preconfigured database.