Nozzle Rotation for Interference-Free Component Imaging
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Solution Overview
Problem
In component mounters, large electronic components can interfere with previously mounted components on a board when imaged from below, as they may extend into the space above the board, causing interference and imaging challenges.
Innovation Solution
A component mounter system that includes a control device to rotate the nozzle and adjust the imaging position to avoid interference, ensuring the electronic component is not in the space above the board during imaging, and divides the imaging target region into multiple areas for comprehensive imaging without overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electronic component is imaged from below without rotation, then the imaging process is simple and fast, but large electronic components will extend into the space above the board and interfere with previously mounted components
Solution Approach 1:
The nozzle is made rotatable about its axis, allowing dynamic adjustment of the electronic component's orientation during imaging. The control device rotates the nozzle to a specific angle where the electronic component's projection does not overlap with previously mounted components, enabling imaging without interference while maintaining imaging speed
Solution Approach 2:
The orientation angle of the nozzle is changed as a control parameter. By calculating and setting the nozzle rotation angle based on the electronic component's size, shape, and position, the system finds an optimal orientation where the component can be imaged without extending into the space above the board and interfering with other components
2Object-affected harmful factors
If the electronic component is rotated to avoid interference, then interference with previously mounted components is avoided, but the imaging process becomes more complex and time-consuming
Solution Approach 1:
The control device calculates the optimal nozzle rotation angle in advance, before the imaging process begins. This preliminary calculation of the rotation angle based on component geometry and board layout simplifies the actual imaging process, as the nozzle only needs to rotate to a pre-determined position rather than requiring complex real-time adjustments
Solution Approach 2:
The nozzle rotation mechanism serves as an intermediary between the imaging device and the board. By rotating the nozzle, the system mediates the spatial relationship between the electronic component and previously mounted components, allowing imaging without interference through a simple rotational motion rather than complex multi-axis movements
3Object-affected harmful factors
If the electronic component is rotated during imaging, then interference with previously mounted components is avoided, but the imaging time increases due to rotation and multiple imaging positions
Solution Approach 1:
The system uses dynamic rotation of the nozzle to quickly adjust the electronic component's orientation. The rotation is performed at a constant speed to a pre-calculated angle, which is faster than moving the imaging device or the board, minimizing the time loss while achieving interference-free imaging
Solution Approach 2:
The nozzle rotation angle is optimized to minimize imaging time. The control device calculates the angle that achieves interference-free imaging with the minimum necessary rotation, balancing the need to avoid interference with the desire to minimize imaging time
Data Source
AI summary
A component includes a board conveyance device, a component supply device, a nozzle, a component moving device, an imaging device, and a control device to, in a case where the electronic component picked up by the nozzle has an enough size to be disposed over both the entire imaging range of the imaging device and a space above the board conveyed to the work position, when the electronic component is imaged by the imaging device, cause the component moving device to rotate the nozzle at a position at which the electronic component is not located in the space above the board and cause the imaging device to image the electronic component from below before and after the nozzle is rotated about the axis.