Multi-Axis Servo Amplifier Shutdown for Gravity Axis Locking
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Solution Overview
Problem
Existing servo amplifier systems for multi-axis control do not adequately prevent gravity axes from falling spontaneously during power supply disruptions, necessitating improved measures for power supply abnormalities.
Innovation Solution
The servo amplifier system categorizes axes into a first group to be locked and a second group to be servo-off during power supply abnormalities, ensuring controlled shutdown and prevention of axis movement, with the Z-axis locking device automatically disabling movement upon power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake device is used to lock the gravity axis during power supply abnormality, then the axis can be prevented from falling, but the system complexity increases due to additional brake circuits and control mechanisms
Solution Approach 1:
The patent extracts the axis grouping logic from the brake control system and relocates it to the servo amplifier system. The servo amplifier now directly determines which axes receive power shutoff signals based on their grouping (first axis group vs. second axis group), eliminating the need for complex external brake circuits and delay circuits while maintaining reliable prevention of axis falling during power supply abnormalities
Solution Approach 2:
The servo amplifier is given a dual function: it continues to perform its traditional role of controlling servo motors while also taking on the responsibility of determining axis grouping and controlling power shutoff signals during power supply abnormalities. This multi-functionality consolidates control logic within the existing servo amplifier, reducing overall system complexity while maintaining reliability
2Reliability
If power shutoff signal is delayed before reaching the main control section, then the brake device can be activated immediately, but the response time for complete system shutdown is increased
Solution Approach 1:
The patent implements preliminary classification of axes into first and second axis groups during normal operation, storing this grouping information in the servo amplifier. When a power supply abnormality occurs, the servo amplifier can immediately generate appropriate power shutoff signals based on pre-stored grouping data without requiring real-time analysis or delay circuits, thus achieving both immediate response and systematic control
Data Source
AI summary
Provided is a servo amplifier system performing a multi-axis control for multiple axes, in which the multiple axes includes a first axis group which an axis to be locked, at the time of power supply abnormality in the multi-axis control, belongs to, and a second axis group which an axis to be subjected to servo-off belongs to, the servo-off being made before the axis belonging to the first axis group is locked at the time of the power supply abnormality.