Path Display Apparatus for Servo Adjustment with Correction Data
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Solution Overview
Problem
Existing path display apparatuses for machine tools with correction data such as backlash and pitch error corrections are complex and time-consuming to operate, making it difficult to check response delays and perform servo adjustments effectively.
Innovation Solution
A path display apparatus that acquires and subtracts correction data from both position commands and feedbacks to display command and feedback paths, allowing for direct comparison and simplifying the process of checking motor response delays and adjusting servos, with an optional second correction data calculation using a transfer function to account for control delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If correction data is added to position commands to reduce mechanical errors, then manufacturing precision is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The invention extracts correction data from the position command processing flow and displays it separately on the display device. This allows operators to view correction information without interfering with the normal control operations, thus improving ease of operation while maintaining the precision benefits of correction data application.
Solution Approach 2:
The display device acts as an intermediary between the correction data processing system and the operator. It presents correction information in a visual format that helps operators understand the effect of corrections without requiring them to manually process or invalidate correction data, thereby simplifying operations.
2Manufacturing precision
If correction data is applied to position commands, then manufacturing precision is improved, but checking response delays becomes more difficult
Solution Approach 1:
The invention implements feedback by displaying both the original position commands and the corrected position commands simultaneously. This visual feedback mechanism allows operators to compare the two paths and detect response delays or anomalies without needing to temporarily invalidate correction data, thus maintaining precision while improving detectability.
Solution Approach 2:
The display device uses different visual representations (such as different colors or line styles) to distinguish between original position commands and corrected position commands. This visual differentiation makes it easier to detect and analyze response delays and path deviations caused by correction data application.
3Manufacturing precision
If correction data is superimposed on position commands, then manufacturing precision is improved, but path verification becomes time-consuming
Solution Approach 1:
The invention performs preliminary action by pre-calculating and displaying the corrected position command path alongside the original path before actual machining operations begin. This allows operators to verify path accuracy in advance without requiring time-consuming manual checks or temporary invalidation of correction data during setup.
Solution Approach 2:
The display device creates a visual copy of the position command path with corrections applied, allowing operators to review and verify the corrected path without affecting the actual machining process. This copying mechanism enables quick path verification while maintaining the precision benefits of correction data.
Data Source
AI summary
A path display apparatus includes a first position command acquiring unit that acquires first position command for motors, a first position feedback acquiring unit that acquires first position feedback of each of the motors, a correction data acquiring unit that acquires correction data generated for each of the motors, a second position command calculating unit that subtracts the correction data from the first position command to calculate a second position command, a second position feedback calculating unit that subtracts the correction data from the first position feedback to calculate second position feedback, a command path display unit that displays a command path of the tip point of the tool, based on the second position command; and a feedback path display unit that displays a feedback path of the tip point of the tool, based on the second position feedback.