1323 switching distances the real switching distance

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Unformatted text preview: tance between a diffuse sensor and a reference surface of specified dimensions (matt white paper) as it approaches the device in the direction of the axis until a signal change takes place. 400 mm 350 300 1 2 250 200 150 100 50 15 mm 5 sx 0 5 mm 15 sx Switch-on point (1) Switch-off point (2) Fig. 13.2.2: Response characteristics of diffuse sensors © Festo Didactic GmbH & Co. KG • FP 1110 205 13. Technical terms relating to proximity sensors Switching distance The distance at which a standard target approaching the active surface of a proximity sensor generates a signal change. 1 1,21 sn sr su 1,1 sn sn 3 0,9 sn 2 sa 0,81 sn 4 5 d Actuating element (1) sn = Nominal switching distance Total tolerance range (2) sr = Real switching distance Manufacturing tolerance (3) su = Useful switching distance Reliable operating range (4) sw = Working distance Proximity sensor (5) Fig. 13.2.3: Switching distances The real switching distance is specified by 0.9 sn < sr < 1.1 sn. The useful...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.

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