| 摘要 |
When plural board blocks formed in one board undergo sequential part-mountings at plural mounting stages, particular recognition points and recognition points in the board blocks target of a downstream mounting stage are recognized at an upstream mounting stage. Relative positional data of each recognition point of the board block with respect to the particular recognition points are thus obtained at the upstream mounting stage. At the mounting stage on downstream side, only the particular recognition points are recognized thereby detecting a whole position of the board. Based on the whole position and the relative positional data, a positional deviation of the board block at the mounting stage can be detected, so that repeated recognition of the same recognition points is avoided thereby shortening a total time of position recognition.
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