Axial Feed Position Control Using Rounded Stop Coordinates
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Solution Overview
Problem
In continuous axial feed operations in machine tools, variations in the stopping position and movement of objects occur due to operator timing errors, especially at faster axial feed rates, leading to inaccuracies in reaching the desired position.
Innovation Solution
A control device and method that includes an input unit for specifying axial feed rates, a motor driving control unit, an amount-of-movement detecting unit, a coordinate position detecting unit, and a rounding processing unit to repeatedly round the coordinate position and movement to a corresponding rounding place during operation, ensuring accurate stopping positions after the operation is stopped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the axial feed rate is increased to improve productivity, then the axial feed operation becomes faster, but the error between the desired stopping position and the actual stopping position increases
Solution Approach 1:
The rounding processing is performed in advance during the axial feed operation to determine the target stopping position. By calculating the rounded coordinate position before the operation ends, the system prepares the corrected position data ahead of time, allowing the motor to automatically move to the precise rounded position after the operation stops, thereby eliminating the stopping position error that would otherwise increase with faster feed rates
Solution Approach 2:
The system continuously monitors the coordinate position during the axial feed operation and performs rounding processing based on the specified feed rate. This feedback mechanism allows the system to adjust and correct the stopping position dynamically, ensuring that even at higher feed rates, the final position accuracy is maintained by automatically moving to the rounded target position after operation completion
Data Source
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AI summary
A control device (14) includes: an input unit (52); a motor driving control unit (64); an amount-of-movement detecting unit (66); a coordinate position detecting unit (68); a display unit (56); and a rounding processing unit (70) configured to, during an axial feed operation, repeatedly perform rounding processing for rounding to a rounding place at least one of the coordinate position and the amount of movement of an object (16) to be moved. The motor driving control unit (64) drives motors (50X, 50Y), after the axial feed operation has been stopped, based on the result of the rounding processing that was performed last.