The gaps between the sheets are used for the purpose

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nder nozzle hits the receiver thus creating a signal. With an air barrier a signal is created only if an object is not present. A major advantage of this solution (as opposed to an optical proximity sensor for instance) is in that contamination such as drilling fluid does not interfere with operation. 130 © Festo Didactic GmbH & Co. KG • FP 1110 8. Pneumatic proximity sensors 20 mm mm 381 Fig. 8.7.2: Use of an air barrier for counting plastic sheets Clear plastic sheets pass on a transport device in gaps of 20 mm. The gaps between the sheets are used for the purpose of counting. A pressure amplifier is fitted downstream of the air barrier receiver. Key data • Supply pressure of sender 25 kPa (0.25 bar) • Response time 16 ms • Maximum speed of transport device 37 m/min. The use of optical or capacitive proximity sensors would present problems in this instance; ultrasonic proximity sensors would be a possible alternative. © Festo Didactic GmbH & Co. KG • FP 1110 131 8. Pneumatic proximity sensors p = 10 to 30 kPa 1 3 1 2 2 Back pre...
View Full Document

Ask a homework question - tutors are online