A hierarchical optimization method in the PCB assembly for surface mounting machines

Hong, Jae Min; Lee, Sung Han; Lee, Beom Hee

doi:10.1109/isie.1997.651804

Cited by 3 publications

References 11 publications

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Sequence placement planning for high‐speed PCB assembly machine

Ong

Wenzhe

2002

Integrated Manufacturing Systems

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In order to handle high and rapid production demands, printed circuit board (PCB) manufacturers have employed high‐speed surface mount machines into their assembly lines. These machines have abilities of fast component placements, but provide challenges for process engineers to optimise the component placement sequences and feeder arrangements via effective planning. A computer program was developed based on operating concepts using genetic algorithm, to solve for various component placement sequencing planning of the high‐speed chipshooter. Genetic algorithms are a class of general purpose search methods based on the concepts of genetic evolution and survival of the fittest. The program provides information on component placement sequences and feeder arrangements for optimal assembly times. Initial tests have shown that the size of the parent space affects the convergence of the solutions during iterations. Finally, comparisons of results have shown improvement over those previously obtained by other researchers.

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Sequence placement planning for high‐speed PCB assembly machine

Ong

Wenzhe

2002

Integrated Manufacturing Systems

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New models and heuristics for component placement in printed circuit board assembly

Burke

Cowling²,

Keuthen³

Proceedings 1999 International Conference on Information Intelligence and Systems (Cat. No.PR00446)

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Low cost control system with hierarchy architecture for sequencer

Yang

2010

2010 8th World Congress on Intelligent Control and Automation

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A low cost control system with hierarchy architecture for sequencer is designed in this paper. A touch screen computer is used as master computer to realize Human Machine Interface (HMI). A programmable logic controller (PLC) works as slave computer to receive sequence file and instructions from the master computer. It controls the component arranging, component inspecting, and component taping processes. Manipulating microprocessors work as the slave computers of the PLC. They receive commands from the PLC and control the amplifiers to drive the rotary electromagnets, which are used to cut off components. A sequence algorithm realized in the PLC is proposed to track the identification (ID) numbers of pallets on the chain. The ID numbers of the pallets are recorded in the PLC at the beginning of sequence procedure, and shifted as long as the movement of the chain. All the ID numbers of the pallets are compared with the ID numbers of component feeders over them. A component is fed into the pallet if its feeder has the same ID number as the pallet. Experimental results verify the validity of the designed control system and the proposed sequence algorithm.

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A hierarchical optimization method in the PCB assembly for surface mounting machines

Cited by 3 publications

References 11 publications

Sequence placement planning for high‐speed PCB assembly machine

Sequence placement planning for high‐speed PCB assembly machine

New models and heuristics for component placement in printed circuit board assembly

Low cost control system with hierarchy architecture for sequencer

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