Rotary Head Segmentation for Large Component Imaging
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Solution Overview
Problem
Component mounting machines with rotary heads that hold suction nozzles face challenges in imaging large components without increasing the camera's viewing field, as existing solutions require replacing the entire mounting head, which is costly and inefficient.
Innovation Solution
A component mounting machine design that allows for the attachment of two types of rotary heads with different nozzle configurations (four and twelve nozzles) to a common drive unit, using a control system to adjust the rotation angles and camera viewing field, enabling imaging of large components without enlarging the camera's field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the entire mounting head including drive devices is replaced to accommodate different component types, then the component mounting machine can handle different component sizes, but the size and weight of the head part to be replaced increase and costs increase
Solution Approach 1:
The mounting head is divided into two independent parts: a common drive unit (containing R-axis and θ-axis drive devices) and a replaceable rotary head (containing suction nozzles). This segmentation allows the heavy drive devices to remain stationary while only the lightweight rotary head is replaced when changing component types, resolving the contradiction between versatility and weight.
Solution Approach 2:
The common drive unit is designed with universal functionality to support multiple types of rotary heads with different nozzle configurations (e.g., 4 nozzles for large components, 12 nozzles for small components). This multi-functionality allows the expensive drive devices to serve multiple purposes while only the inexpensive rotary heads need to be replaced, addressing both the versatility requirement and the cost/weight reduction goal.
2Adaptability or versatility
If a rotary head with four suction nozzles is used for large components, then the component can be suctioned, but the component protrudes from the viewing field of the component camera
Solution Approach 1:
The system changes the parameter of rotary head configuration (number of nozzles, pitch circle diameter) to match different component sizes. When handling large components, a rotary head with 4 nozzles and larger pitch circle diameter is used, which naturally positions components within the camera's fixed viewing field. This parameter adjustment resolves the contradiction between component size adaptability and viewing field coverage.
3Ease of operation
If the rotary head is made attachable and detachable to reduce weight and size, then replacement becomes easier, but the structure becomes more complex with multiple rotary head types
Solution Approach 1:
A universal attachment interface is designed on the common drive unit that can accommodate multiple rotary head types (4-nozzle, 12-nozzle configurations). This universal design simplifies the attachment mechanism while supporting diversity in rotary head configurations, resolving the contradiction between ease of replacement and device complexity.
Data Source
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AI summary
There is provided a component mounting machine in which all of the components which are larger than a predetermined size can be imaged simultaneously without increasing a viewing field of a component camera by changing a position of the components to be image-processed when the components are suctioned by four suction nozzles on a circumference. A rotary head 50 is configured of at least two types of rotary heads, such as a first rotary head 50A in which four suction nozzles 54 are respectively held to be rotatable on the circumference, and a second rotary head 50B in which the suction nozzles of which the number is more than four are respectively held to be rotatable on a pitch circle diameter which is the same as that of the suction nozzle of the first rotary head, the first rotary head is attached to the drive unit 51, and a control device 90 which controls an angular position of the first rotary head and an angular position of the components suctioned to the suction nozzles, to be respectively controlled to be changed by 45 degrees when the components held by the suction nozzles are imaged by a component camera 85 is provided.