| 摘要 |
PURPOSE:To perform a through hole mark reading work accurately and efficiently, by switching X-axis and Y-axis brakes of a reading head alternately for every switch operation to read through hole marks on a printed board drawing. CONSTITUTION:A brake switch equipped with three push-button switches A, X, and Y is provided; and if the switch X is depressed when X-axis and Y-axis brakes are released together, the X-axis brake is out on, and the Y-axis brake is released as it is. When the switch Y is depressed in this state, an FF166 is set to put on the Y-axis brake, and an FF168 is reset to release the X-axis brake. Since X-axis and Y-axis brakes are switched alternately for every switch operation to read through hole marks on the printed board drawing, the through hole mark reading work is performed accurately and efficiently. |
