Surface Mounting Camera Correction Jig for Optical Drift
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Solution Overview
Problem
The existing surface mounting apparatuses face challenges in accurately correcting for temporal changes in the optical system of the board recognizing camera, which affects the precision of electronic component mounting due to changes within the camera's interior, such as the CCD chip and optical system, leading to inconsistent imaging results.
Innovation Solution
A surface mounting apparatus with a correction jig that includes a movable correction mark, fixed to the base with the board recognizing camera, allowing for accurate correction of temporal changes in the camera's optical system by imaging the correction mark and adjusting the mounting head's position accordingly, without requiring movement of the camera itself.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the board recognizing camera is moved to correct the fixing position, then the position correction can be performed, but the camera itself undergoes temporal change leading to inaccurate correction
Solution Approach 1:
The correction mark is separated from the camera system and placed on a movable correction jig. This segmentation allows the correction reference to be independently positioned without moving the camera, thus avoiding temporal changes in the camera's optical system while still enabling accurate position correction.
Solution Approach 2:
A movable correction jig serving as an intermediary carrier for the correction mark is introduced. This intermediary allows the correction function to be decoupled from the camera system, enabling position correction without subjecting the camera to mechanical stress or temporal changes that would affect its imaging accuracy.
2Measurement precision
If the camera is moved to perform position correction, then correction can be achieved, but mechanical errors are introduced affecting accuracy
Solution Approach 1:
The correction function is segmented from the camera system by placing the correction mark on a separate movable jig. This eliminates the introduction of mechanical errors that would occur if the camera itself were moved, while still enabling accurate position correction through the independent positioning of the correction jig.
Solution Approach 2:
Instead of moving the camera to perform correction (which introduces mechanical errors), the correction jig carrying the correction mark is moved into the camera's imaging range. This inverted approach keeps the camera stationary and eliminates mechanical errors while achieving the same correction objective.
3Reliability
If the correction mark is always within imaging range, then correction is always possible, but it interferes with production operations
Solution Approach 1:
The correction jig is designed to be movable between a correction position (within imaging range) and a standby position (outside imaging range). This dynamic positioning allows the system to switch between correction mode and production mode, ensuring correction availability when needed while eliminating interference with production operations during manufacturing.
Solution Approach 2:
The correction operation is performed periodically at predetermined intervals rather than continuously. The correction jig moves into the imaging range only when correction is needed, performs the correction, then returns to the standby position. This periodic action ensures correction availability while maintaining high production efficiency during non-correction periods.
Data Source
AI summary
A surface mounting apparatus includes a mounting head which is movable in X and Y directions and which mounts an electronic component on a positioned board, and a board recognizing camera is fixed to a base and which moves integrally with the mounting head. A correction jig includes a correction mark which is imaged by the board recognizing camera, and an imaging result is used to correct temporal change in an interior portion of the camera including an optical system, and is fixed to the base.