Electronic Component Mounting Apparatus Load Abnormality Detection
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Solution Overview
Problem
Existing electronic component mounting systems fail to accurately detect abnormalities in the component holding device, leading to potential improper mounting or damage, as the load applied by the suction nozzle may not reach or exceed the target load due to motor issues, despite generating torque corresponding to the target load.
Innovation Solution
An electronic component mounting apparatus that includes a load measurement device and a motor information acquisition section, allowing the determination section to compare the actual load measured with the motor information to detect abnormalities in the component holding device by performing the same mounting operations on a load measurement device instead of a board, ensuring accurate load application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If motor control is performed to reach target load, then motor generates corresponding torque, but load applied to board may not reach target load due to mounting head abnormalities
Solution Approach 1:
The system performs feedback control by measuring the actual load applied to the board with a load cell and comparing it with the target load. The motor control device adjusts the motor output based on the difference between measured and target loads, ensuring that the component holding device applies the correct load even when abnormalities occur in the mounting head or component holding section.
2Power
If motor generates torque corresponding to target load, then control is performed, but load may exceed target load causing damage
Solution Approach 1:
The load cell continuously monitors the actual load applied to the board and feeds this information back to the motor control device. When the measured load approaches or exceeds the target load, the control device immediately adjusts the motor torque to prevent damage, providing real-time protection against excessive loading conditions.
3Measurement precision
If load control is performed using load cell measurement, then push-in amount is adjusted, but abnormalities in component holding device cannot be detected
Solution Approach 1:
The system compares the feedback signal from the load cell with the motor information (current, voltage, or torque data) in a determination section. This dual-comparison approach not only maintains precise load control but also detects abnormalities in the component holding device by identifying discrepancies between the expected motor output and the actual load applied.
Solution Approach 2:
The determination section acts as an intermediary that analyzes both the load cell measurement and motor information to detect abnormalities. By introducing this intermediate analysis layer, the system can identify issues in the component holding device without interfering with the primary load control function.
4Productivity
If motor control is performed without abnormality detection, then mounting process continues, but improper mounting or damage may occur
Solution Approach 1:
The determination section continuously monitors the relationship between motor output and actual load application during the mounting process. When an abnormality is detected (such as a mismatch between motor torque and measured load), the system can immediately stop or adjust the mounting operation, preventing improper mounting or damage while minimizing impact on overall productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables the detection of abnormalities in the component holding device, preventing improper mounting and potential damage by comparing the measured load with the motor information, ensuring consistent and accurate load application during the mounting process.
Implementation Method 1
a load measurement device configured to measure a load applied from the component holding device by being pressed by the component holding device
Data Source
AI summary
An electronic component mounting device including a component holding device to hold and mount on a board an electronic component supplied by a component supply device; a motor to drive the component holding device; a motor control device to control the motor; a load measurement device to measure a load applied from the component holding device upon being pressed by the component holding device while the component holding device performs the same operation as when mounting an electronic component on a board, by replacing the board with the load measurement device; a motor information acquisition section to obtain motor information corresponding to the force with which the motor drives the component holding device in the pressing direction against the load measurement device while the motor control device performs the same operation as when mounting an electronic component on the board, by replacing the board with the load measurement device.