Tool Track Display Device for CNC Servo Control
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Solution Overview
Problem
Conventional tool track display devices fail to distinguish between forward and return paths during machining operations, making it difficult to correlate track deviations with motion direction and perform effective servo control.
Innovation Solution
A tool track display device that acquires position information from numerical control devices and position sensors, calculates tool coordinates, and modifies display attributes based on motion direction, allowing for distinct display of forward and return paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the commanded track and actual track are displayed without distinguishing forward and return paths, then the display is simple, but it is impossible to correlate track deviation with motion direction
Solution Approach 1:
The patent applies color changes to differentiate between forward and return paths in tool track display. By assigning different colors to tracks based on motion direction, the system preserves motion direction information without significantly increasing display processing complexity. This allows operators to easily distinguish and analyze track deviations in different motion directions.
2Loss of information
If display attributes are modified based on inclination of line segments, then unevenness in tool track can be determined, but it is impossible to modify display attribute depending on motion direction
Solution Approach 1:
The patent extends display attribute modification to include motion direction information. By modifying display attributes such as color based on whether the tool is moving in forward or return direction, the system enables comprehensive track analysis that considers both geometric unevenness and motion direction, facilitating more effective servo control adjustments.
3Measurement precision
If the tool track is displayed based on NC data from CAD, then the commanded track can be shown, but it is impossible to display the actual track of the tool tip movement
Solution Approach 1:
The patent introduces position sensors as intermediary devices that directly measure the actual position of the tool tip during machining operations. By combining NC data (commanded track) with sensor measurements (actual track), the system enables precise comparison and analysis of track deviations, facilitating accurate servo control without requiring complex measurement systems.
Data Source
AI summary
A tool track display device includes a position information acquisition unit which acquires position information of at least one drive axle from a numerical control device and a position sensor provided on the at least one drive axle, a tool coordinate calculation unit which calculates coordinate values of the tool based on the position information of the at least one drive axle and information regarding the mechanical structure of a machine tool, a display attribute modification unit which modifies the display attribute of the tool track in accordance with the motion direction of the tool, and a display unit which displays the tool track based on the coordinate values of the tool calculated by the tool coordinate calculation unit and the display attribute modified by the display attribute modification unit.