Machine Tool Spindle Parameter Check Using Acceleration Time
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Solution Overview
Problem
Conventional numerical control systems for machine tools cannot accurately check and adjust parameters specific to each spindle and motor, leading to improper spindle operation due to incorrect parameter settings.
Innovation Solution
A numerical control system with a parameter check function unit that measures and compares acceleration/deceleration times to determine the correctness of drive control parameters, including a unit to measure acceleration/deceleration times, a storage unit for specified values, and a determination unit to assess parameter validity, along with a display and warning system for abnormal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional parameter check function is used, then general parameter errors can be detected, but parameters specific to each spindle and motor cannot be checked
Solution Approach 1:
The invention changes the parameter being checked from static parameter values to dynamic operational characteristics (acceleration/deceleration time). By measuring the actual time it takes for the spindle to accelerate or decelerate under controlled conditions, the system can detect parameter errors specific to each spindle-motor combination without requiring manual parameter input or comparison
Solution Approach 2:
The system performs self-diagnosis by automatically measuring its own acceleration and deceleration characteristics. The control unit commands the spindle to accelerate and decelerate, then measures the actual time taken, comparing it against predetermined standards to determine if parameters are correct, eliminating the need for external parameter verification
2Loss of time
If parameter checking is performed manually or through conventional methods, then setup time is reduced, but detection precision of specific parameter errors deteriorates
Solution Approach 1:
The invention replaces manual parameter verification methods with an automated measurement system. Instead of manually checking parameter values or using conventional comparison methods, the system automatically measures the physical quantity of acceleration/deceleration time through computational means, achieving both time efficiency and high detection precision
Solution Approach 2:
The system implements feedback by measuring the actual acceleration/deceleration time and comparing it against predetermined standard values. The control unit receives the measured time, determines whether it falls within the acceptable range, and can issue warnings or alerts when parameter errors are detected, creating a closed-loop verification system
Data Source
AI summary
An object is to provide a numerical control system of a machine tool which can check a parameter that needs to be adjusted for each of a spindle and a motor. A numerical control system of a machine tool includes a parameter check function unit for checking a drive control parameter of a spindle, and the parameter check function unit includes: an acceleration/deceleration time measurement unit which measures an acceleration/deceleration time that elapses after the spindle receives an acceleration command and/or a deceleration command until the completion of acceleration and/or the completion of deceleration; an acceleration/deceleration time specified value storage unit which stores a specified value of the acceleration/deceleration time that is previously determined for each specification of the machine tool; and a determination unit which compares the acceleration/deceleration time measured with the acceleration/deceleration time measurement unit and the specified value stored in the acceleration/deceleration time specified value storage unit so as to determine whether or not the drive control parameter of the spindle is proper.