| 摘要 |
PURPOSE:To exactly control the number of soldered substrates even in the case where a plurality of substrates use conveyed successively. CONSTITUTION:A sensor 1 is arranged at the substrate entry of conveyer 11, a sensor 2 is arranged at the outlet of substrate and a sensor 3 is provided near a pulley with gear 12 to sense each gear tooth of the pulley and generate pulse signals. A substrate P is put on the conveyer 11 from the inlet side to be conveyed, a pulse number counter 4 is set when the sensor 1 senses the substrate P and the pulse number detected with the sensor 3 is counted by the counter 4. No matter how the conveyer velocity is varied, the target pulse number from the sensor 1 to the sensor 2 is unchanged. When the pulse number counted by the pulse number counter 4 reaches a target pulse number, the arrival of the substrate is instantaneously checked at the moment with the outlet side substrate sensor 2. In the case where the substrate P exist, soldered substrate number is counted by a produced substrate counter 5. |
