Mounting Head Calibration for Component Pickup Accuracy
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Solution Overview
Problem
There is a need to improve the production efficiency and accuracy of the mounting process in component mounting machines by effectively reflecting the results of calibration processing for the mounting head and preventing mistakes in pickup and mounting operations.
Innovation Solution
The component mounting machine incorporates a mounting head with a holding member that can be lifted, lowered, and rotated, along with a storage section for correction values based on measurement angles and a control section that corrects the lowering amount of the holding member to a target height based on the pickup angle and correction values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the holding member is lowered to a predetermined target height without correction, then the pickup operation can be performed, but the lowering accuracy is insufficient due to individual differences in mounting head configuration
Solution Approach 1:
The patent performs calibration processing before production to measure the actual position of the holding member at multiple measurement angles. These measurements are used to create correction values that are stored and applied during subsequent pickup operations, eliminating the need for real-time complex calculations while achieving high precision.
Solution Approach 2:
The patent introduces correction values that modify the predetermined target height based on the actual measured position of the holding member. By changing the height parameter dynamically according to calibration data and pickup angles, the system compensates for individual differences in mounting head configuration and achieves accurate lowering.
2Manufacturing precision
If calibration processing is performed to improve mounting accuracy, then the accuracy of the mounting process improves, but the time required for calibration and setup increases
Solution Approach 1:
The calibration processing is performed once before production to establish correction values for each measurement angle. These correction values are then reused during actual pickup operations, making the initial time investment worthwhile by enabling fast, accurate pickups without repeated calibration.
Solution Approach 2:
The patent measures the holding member position at multiple measurement angles (e.g., 0°, 90°, 180°, 270°) to comprehensively capture individual differences in the mounting head. This excessive measurement approach ensures that correction values are available for any pickup angle, improving accuracy without requiring continuous real-time measurement.
3Adaptability or versatility
If the holding member configuration varies individually, then the mounting head can be flexible in design, but the pickup accuracy deteriorates due to individual differences
Solution Approach 1:
The patent compensates for individual differences in holding member configuration by introducing correction values that adjust the target height based on the actual position. This allows the mounting head to maintain design flexibility while achieving consistent pickup accuracy across different individual units through parameter adjustment rather than structural modification.
Data Source
AI summary
A component mounting machine includes a mounting head that supports a holding member capable of holding a component to be lifted and lowered and to be rotated about a central axis of the holding member, a storage section configured to store a correction value for each of multiple measurement angles set based on an error in a height direction when the holding member is moved to a specified height in a state of being indexed to the multiple measurement angles about the central axis, and a control section configured to correct a lowering amount of the holding member to a target height based on a pickup angle of the holding member indexed about the central axis and the correction value for each of the multiple measurement angles, in a pickup operation of picking up the component by the holding member.