Spindle Axis Control for Tapping Cycle Time Reduction
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Solution Overview
Problem
Existing machine tool control systems require complex parameter settings and adjustments to maximize spindle axis acceleration capacity, leading to increased cycle times in tapping processes.
Innovation Solution
A controller configured to prepare spindle-axis and feed-axis commands based on a tapping program, enabling accelerated and decelerated rotational motions with maximum power usage, detecting residual rotation amounts and current speeds to accurately reach target positions without requiring detailed power characteristic adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex parameter settings and adjustments are performed to maximize spindle axis acceleration capacity, then manufacturing precision can be improved, but device complexity and operation difficulty increase
Solution Approach 1:
The control device automatically detects the actual acceleration capacity of the spindle axis through trial operations and self-adjusts control parameters without requiring operator intervention for manual tuning. The system performs self-diagnosis and self-optimization by measuring actual acceleration during test runs and automatically setting appropriate control parameters based on detected characteristics.
Solution Approach 2:
The system dynamically changes control parameters based on detected spindle axis characteristics. Instead of using fixed or pre-set parameters, the control device adjusts acceleration ratios, velocity command profiles, and other control parameters according to the actually measured acceleration capacity, allowing optimal performance across different machine configurations.
2Productivity
If complex parameter settings and adjustments are performed to maximize spindle axis acceleration capacity, then productivity can be improved by reducing cycle time, but ease of operation deteriorates
Solution Approach 1:
The control device automatically detects the actual acceleration capacity of the spindle axis through trial operations and self-adjusts control parameters without requiring operator intervention for manual tuning. The system performs self-diagnosis and self-optimization by measuring actual acceleration during test runs and automatically setting appropriate control parameters based on detected characteristics.
Solution Approach 2:
The system performs preliminary trial operations to detect spindle axis acceleration capacity before actual production work. By conducting acceleration detection trials and parameter optimization in advance, the system prepares optimal control parameters beforehand, enabling maximum productivity during subsequent production operations without requiring complex manual setup.
3Loss of time
If acceleration capacity is maximized through complex parameter settings, then loss of time is reduced, but device complexity increases
Solution Approach 1:
The control device automatically detects the actual acceleration capacity of the spindle axis through trial operations and self-adjusts control parameters without requiring operator intervention for manual tuning. The system performs self-diagnosis and self-optimization by measuring actual acceleration during test runs and automatically setting appropriate control parameters based on detected characteristics.
Solution Approach 2:
The system uses feedback from actual acceleration measurements during trial operations to automatically adjust control parameters. By monitoring the actual acceleration response and using this feedback to refine control settings, the system achieves optimized cycle times without requiring complex manual parameter specification, as the parameters are automatically tuned based on measured performance.
4Manufacturing precision
If manual parameter adjustment is required to conform to power characteristics, then manufacturing precision can be maintained, but ease of operation and adaptability decrease
Solution Approach 1:
The control device automatically detects the actual acceleration capacity of the spindle axis through trial operations and self-adjusts control parameters without requiring operator intervention for manual tuning. The system performs self-diagnosis and self-optimization by measuring actual acceleration during test runs and automatically setting appropriate control parameters based on detected characteristics.
Solution Approach 2:
The control device is designed to automatically adapt to different machine tool configurations and spindle characteristics without requiring machine-specific manual parameter setup. By universally applying the automatic acceleration detection and parameter adjustment functionality across different machine types, the system maintains tapping accuracy while being adaptable to various configurations.
Data Source
AI summary
A controller for controlling a synchronized operation of spindle and feed axes. A spindle-axis control section includes an initial-motion control section for accelerating a spindle axis at maximum capacity from a starting position; a maximum-acceleration detecting section for detecting a maximum acceleration of the spindle axis; a residual rotation-amount detecting section for detecting a residual rotation amount of the spindle axis; a current-speed detecting section for detecting a current speed of the spindle axis; a decelerating-motion control section for decelerating the spindle axis to reach an intermediate speed, after the acceleration; a positioning-motion control section for decelerating the spindle axis to reach the target position after reaching the intermediate speed; a flux-content predicting section for predicting an actual motor-flux content at the intermediate speed; and a deceleration determining section for determining a deceleration for a positioning operation, based on the maximum acceleration, the motor-flux-content command value and the motor-flux content.