| 摘要 |
PURPOSE:To make it possible to easily and correctly form reference data for inspecting the printed result of screen printing. CONSTITUTION:Onto a conveying device for conveying a screen 58 to an X-axis- and Y-axis-directions, a laser displacement sensor and a CCD camera are mounted. In advance of screen printing, the CCD camera is moved on the basis of the instructions of an operator to the desired shooting position in the screen 58 so as to obtain plane visual image in order to form reference data of the positions areas and volumes of through holes 62. After the screen printing, among the creamy solders printed on a printed board, the positions and heights of the creamy solders in the range corresponding to the visual image range of the screen 58 are detected with the laser displacement sensor so as to inspect defective printing such as the shifting of printed positions, the shortages of areas and of printed amounts. If defects are present the causes of defect are removed by replenishing creamy solder, cleaning the screen 58 and the like. |
