Suction Nozzle Q-Axis Rotation Height Control for Large Component Interference
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Solution Overview
Problem
Conventional rotary head component mounters are limited in the maximum size of components they can handle due to interference with a central protruding member, requiring multiple types of rotary heads and increasing costs, as Q-axis rotation occurs at a height where large components may collide with this member.
Innovation Solution
Implementing a control device that adjusts the Q-axis rotation height to an intermediate position during component pickup, allowing larger components to be handled without interference, and enabling the central protruding member to be enlarged for stable imaging, while switching between normal and large component modes based on component size and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Q-axis rotation operation is performed at component transport height, then component direction correction is achieved, but large components interfere with the central protruding member
Solution Approach 1:
The patent introduces a new height dimension for Q-axis rotation operation. Instead of rotating at the original component transport height, the suction nozzle is raised to a higher position where the component clearance from the central protruding member is sufficient. This dimensional change in the vertical direction resolves the interference problem while maintaining the orientation correction function.
2Productivity
If the maximum size of component is restricted to avoid interference, then Q-axis rotation at transport height is possible, but the maximum component size that can be mounted is limited
Solution Approach 1:
The patent makes the Q-axis rotation height dynamic rather than fixed. The control device determines the appropriate rotation height based on component characteristics (size, shape, orientation requirements). For large components, the rotation occurs at a higher position to avoid interference, while for smaller components, rotation can occur at the original transport height. This dynamic adjustment expands the range of mountable component sizes.
3Adaptability or versatility
If multiple types of rotary heads are prepared for different component sizes, then various component sizes can be mounted, but costs increase and productivity decreases
Solution Approach 1:
The patent makes a single rotary head universal for mounting components of various sizes by introducing dynamic height adjustment for Q-axis rotation. The control device selects the appropriate rotation height based on component characteristics, allowing one rotary head to handle both small and large components effectively. This eliminates the need for multiple specialized rotary heads, reducing device complexity and costs while maintaining versatility.
Data Source
AI summary
An interference-prevention Q-axis rotation height position is set as a height position at an intermediate point of raising operation of suction nozzle, and a height position at which the component does not interfere with central protruding member on the lower surface of rotary head. Performed is control of large component interference prevention mode, in which, after picking up the component using suction nozzle at a component pickup height position that is the lower limit height position of lowering operation, the direction of the component is corrected by raising the suction nozzle to the interference-prevention Q-axis rotation height position that is a height position at an intermediate point of raising operation of suction nozzle and then rotating the component held by suction nozzle by Q-axis driving operation, and subsequently raising suction nozzle to a maximum height position of the raising operation, and then moving rotary head in the XY direction.