| 摘要 |
PURPOSE:To correct coordinates of each point of a work with high precision by dividing the work into areas which include three reference points selected among plural reference points of the work and calculating the coordinates of each point from the three reference points detected by a visual device. CONSTITUTION:The plural reference points 17 are provided on a printed wiring board 10 and the work is divided into the plural areas which include the three reference points selected among the plural reference points 17 as one group. Then, the coordinates of a component mount position in each area are calculated from the coordinates of the three reference points in the area. Then, the board 10 is fractionized and the coordinates of the component mount position in each area are corrected. Consequently, even if the board 10 have deformation such as curvature, expansion and contraction or local deformation, the component is mounted at the specific component mount position accurately and securely.
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