text: <s>[INST] Best type of device to activate registration input 755 drive Hello, Looking for some advice/thoughts around an eye that I can use to detect the front edge and back edge of an Oriented Strand Board mat moving around 2700 mm/sec. We are getting false detects and I am looking for something that is more accurate. We currently are using 42BT-B2LBSL eyes. [/INST] The sensor you've indicated is a background suppression sensor. What's in the background behind the OSB mat? If your OSB is running on a flat belt or mattop conveyor, you're probably not going to any more successful than you already are. If your OSB mat runs on a roller conveyor, make sure there is nothing below the rollers for a significant distance, and make sure the sensor is centered between the gaps of two rollers. Make sure the gap between rollers is significant as well. Ideally, a through-beam or retroreflective sensor is far better in position-sensitive registration applications such as yours. \\n </s>