Fig 15110 slot type proximity sensors example 238

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: ors The oscillator coil consists of a ferrite ring core with internal coil. The oscillator is attenuated as soon as an electrically conductive object enters the ring. Ring proximity sensors are suitable for instance for contactless sensing of small metal parts, which are transported via a conveyor tube, whereby the conveyor tube passes through the ring sensor. Fig. 15.1.9: Ring type proximity sensor Example Proximity sensors with an internal diameter of 10 mm, 15 mm, 21 mm and 43 mm. © Festo Didactic GmbH & Co. KG • FP 1110 237 15. Special designs and variants of proximity sensors 15.1.13 Slot type inductive proximity sensors Slot proximity sensors are in the shape of a fork, where two oscillator coils are placed opposite one another. The proximity sensor responds to metallic objects in the space between the fork, similar to a light barrier sensor. Proximity sensors of this type are used in applications where constant accurate reproducibility of the switching point is required even if the line of movement of the object varies slightly. Fig. 15.1.10: Slot type proximity sensors Example 238 Proximity sensors with slot widths of 2 – 30 mm © Festo Didactic GmbH & Co. KG • FP 1110 15. Special designs and variants of proximity sensors 15.1.14 Inductive proximity sensors for broken drill monitoring Inductive sensors are also available for monitoring drill breakage, whereby drills, taps or reamers are monitored for fracture during the working process. The princip...
View Full Document

Ask a homework question - tutors are online