COLLISION-FREE INSERTION OF COMPONENTS ON PCBS USING SPATIAL REPRESENTATION TECHNIQUE

This paper presents the technique for checking collision of through-ho le components during the machine insertion process on a printed circui t board (PCB). The spatial representation technique is used to represe nt the components and the mounting head of an insertion machine. An al gorithm that simulates the insertion process is written to detect any collision of component and mounting head during the insertion process. When a collision is detected, the algorithm will attempt to avoid the collision by re-sequencing the components concerned. If resequencing does not avoid the collision, the algorithm will compute a minimum saf e distance for the affected component. The algorithm can also detect c omponent collision due to components' space overlapping each other and subsequently can provide the minimum safe distance. The required safe spacing is based on the type of mounting head or machine used. The al gorithm is a useful and efficient tool that could be leed during the P CB design stage. The effectiveness of the spatial representation techn ique has been demonstrated using the TDK VC-544R/AR insertion machine.