Rotary Head Component Pickup Position Correction for Simultaneous Mounting
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Solution Overview
Problem
Rotary head type component mounters face challenges in simultaneously picking up multiple components due to non-uniform deviation of component pickup positions, making stable simultaneous pickup impossible beyond a certain tolerance, which limits productivity.
Innovation Solution
The system corrects component pickup positions by moving and rotating the rotary head in XY directions and adjusting tape feeders to align suction nozzles on straight lines through ideal pickup points, allowing simultaneous pickup of components from multiple tape feeders with different pitches and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple components are picked up simultaneously by lowering multiple suction nozzles simultaneously, then productivity is improved, but pickup errors occur due to non-uniform deviation of component pickup positions
Solution Approach 1:
The invention divides the correction process into two independent segments: (1) correcting the rotary head position to align the centerline of suction nozzles with the centerline of component supply tapes, and (2) independently adjusting the tape feeding amount for each tape feeder. This segmentation allows each correction to be optimized independently, enabling simultaneous pickup of multiple components while maintaining accuracy despite non-uniform deviations.
Solution Approach 2:
The invention performs correction actions before simultaneous pickup operation. Specifically, it calculates and corrects the rotary head position and tape feeding amounts in advance based on detected deviations, ensuring that when multiple components are picked up simultaneously, the pickup positions are already aligned and pickup errors are prevented.
2Manufacturing precision
If the rotary head is rotated to correct pickup position deviation, then pickup accuracy is improved, but it becomes impossible to correct deviations of multiple components simultaneously due to non-uniform deviation directions and amounts
Solution Approach 1:
The invention separates the correction into two independent parts: rotary head position correction (affecting all nozzles uniformly) and individual tape feeding amount correction (affecting each component independently). This allows the system to handle non-uniform deviations of multiple components by applying different correction strategies to each, enabling simultaneous pickup while maintaining precision.
Solution Approach 2:
The invention makes the correction system dynamic and adaptive by detecting actual deviation amounts and directions for each component, then calculating customized correction values for the rotary head position and each tape feeder independently. This dynamic adjustment capability allows the system to accommodate non-uniform deviations while maintaining simultaneous pickup capability.
3Manufacturing precision
If component pickup positions are corrected one by one, then pickup accuracy is maintained, but productivity cannot be improved due to sequential pickup requirement
Solution Approach 1:
By segmenting the correction into a common rotary head position correction and individual tape feeding corrections, the system can prepare all pickup positions in advance for multiple components. This enables simultaneous pickup operations while maintaining the precision that would otherwise require sequential correction, thereby improving throughput without sacrificing accuracy.
Solution Approach 2:
The system performs all necessary corrections (rotary head positioning and tape feeding amount adjustments) before the simultaneous pickup operation. This preliminary correction ensures that when multiple components are picked up at the same time, each is already at the correct position, eliminating the need for sequential correction and enabling high-speed simultaneous pickup.
Data Source
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AI summary
In a rotary head type component mounter, before using two suction nozzles 26 of rotary head 24 to pick up the leading components in component supply tape set in two tape feeders 23, rotary head 24 is moved in the XY directions by head moving mechanism 25 and rotated by head rotating mechanism 31 such that the pickup points of the two suction nozzles 26 are positioned on the two straight lines A1 and A2 extending in the tape feeding direction of each tape feeder 23 passing through the ideal pickup points of the leading components of the two tape feeders 23, and the leading components are fed to component pickup positions C1 and C2 that are the pickup points of the suction nozzles 26 on the two straight lines A1 and A2. Then, the two suction nozzles of rotary head 24 are lowered simultaneously to pick up the two component simultaneously using the two suction nozzles 26.