Page 183 - Sensors and Control Systems in Manufacturing
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                                    T h ree
                           Cha p te r















                          FIGURE 3.18  Opposed sensing mode. For alignment, move emitter or
                          receiver up-down, left-right, and rotate.




















                          FIGURE 3.19  Retrorefl ective sensing mode. For alignment, move target
                          up-down, left-right.








                                                         Rotate left-right
                                                 Emitted light
                                                                  Rotate up-down
                                Object
                                           Received light







                          FIGURE 3.20  Proximity sensing mode. For alignment, rotate up-down, left-right.
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