--- title: Encoders and Tachometers (3) description: encoder and tachometer selection and troubleshooting guide (3) --- [![Nidec-Avtron-Encoders-Logo](https://blog.nidec-avtronencoders.com/hs-fs/hubfs/Nidec-Avtron-Encoders-Logo.png?width=581&height=100&name=Nidec-Avtron-Encoders-Logo.png "Nidec-Avtron-Encoders-Logo")](https://www.nidec-avtronencoders.com/) - [Find An Encoder](https://www.nidec-avtronencoders.com/encoders) - [Cross Reference Engine](https://www.nidec-avtronencoders.com/cross-reference) - [Get a Quote](https://www.nidec-avtronencoders.com/configurator) - [Accessories](https://www.nidec-avtronencoders.com/accessories) - [Industries](https://www.nidec-avtronencoders.com/industry) - [Videos](https://www.nidec-avtronencoders.com/videos/) - [Contact Us](https://www.nidec-avtronencoders.com/contact) ## [Understanding Metals Industry Speed Feedback Devices](https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-speed-feedback-devices) Posted by [Dave Woodward | View all of Dave's blogs](https://blog.nidec-avtronencoders.com/encoders/author/dave-woodward-view-all-of-daves-blogs) on Nov 12, 2015, 10:54:36 AM [![](https://blog.nidec-avtronencoders.com/hubfs/Blog_Pictures/Analog-Tach-Generator-coupled-to-a-motor.png)](https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-speed-feedback-devices) **Speed Sensors** The Dictionary.com definition for Tachometer: \[ta-kom-i-ter, tuh-\] any of various instruments for measuring or indicating velocity or speed So tachometers are speed measurement devices.  Their use in the metals industry goes back decades to the development of analog drive control systems.   This blog will introduce the three main types of speed feedback devices from a historical perspective and discuss their uses in metals processes. [Read More](https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-speed-feedback-devices) Topics: [Metals](https://blog.nidec-avtronencoders.com/encoders/topic/metals) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-speed-feedback-devices](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-speed-feedback-devices) - ## [Understanding Metals Industry Rotary Sensors](https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-rotary-sensors) Posted by [Dave Woodward | View all of Dave's blogs](https://blog.nidec-avtronencoders.com/encoders/author/dave-woodward-view-all-of-daves-blogs) on Aug 19, 2015, 8:46:00 AM [![](https://blog.nidec-avtronencoders.com/hubfs/Blog_Pictures/WP_Metals_2_6.png)](https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-rotary-sensors) They are called many things: tachometers, tachos, tach-generators, pulse generators, resolvers, encoders, incremental encoders, absolute encoders, rotopulsers, selsyns, the list seemingly goes on and on. How does the metals industry electrical professional know what all these devices are and what kinds he has or needs? In the first of a three-part series, this blog will introduce the main metals industry rotary motion sensors, speed and position. [Read More](https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-rotary-sensors) Topics: [Metals](https://blog.nidec-avtronencoders.com/encoders/topic/metals) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-rotary-sensors](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/understanding-metals-industry-rotary-sensors) - ## [What Kills Encoders in Pulp & Paper Mill Environments](https://blog.nidec-avtronencoders.com/encoders/whatkillsencoders) Posted by [Jay Goree | View all of Jay's blogs](https://blog.nidec-avtronencoders.com/encoders/author/jay-goree-view-all-of-jays-blogs) on Jun 10, 2015, 1:36:24 PM [![](https://blog.nidec-avtronencoders.com/hubfs/Blog_Pictures/paper_mill_Encoder.png)](https://blog.nidec-avtronencoders.com/encoders/whatkillsencoders) Bearings and seals are the main failure items for any encoder in a mill environment today. Lip seals, shaft seals and bearings all have static surfaces in contact with rotating surfaces. Gradually these seal points will wear or break down and allow material to pass into the encoder housing and contaminate optics and short electronics. As bearing surfaces wear, radial movement increases at both seal surfaces, accelerating failure and causing optical path misalignment. Eliminating the bearings and seals from your encoder applications will drastically lengthen the life of your feedback devices. [Read More](https://blog.nidec-avtronencoders.com/encoders/whatkillsencoders) Topics: [Pulp and Paper](https://blog.nidec-avtronencoders.com/encoders/topic/pulp-and-paper) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/whatkillsencoders](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/whatkillsencoders) - ## [Wind Systems Magazine's Q&A with Brian Winter](https://blog.nidec-avtronencoders.com/encoders/wind-energy-qa-with-brian-winter-wind-systems-magazine) Posted by [Gabrielle Gillota | View all of Gabrielle's blogs](https://blog.nidec-avtronencoders.com/encoders/author/gabrielle-gillota-view-all-of-gabrielles-blogs) on Mar 12, 2015, 3:46:21 PM [![](https://blog.nidec-avtronencoders.com/hs-fs/file-2606645543-jpg/Images/BrianWinter.jpg)](https://blog.nidec-avtronencoders.com/encoders/wind-energy-qa-with-brian-winter-wind-systems-magazine) Wind Systems Magazine interviewed Nidec Avtron Encoders’ Product Manager Brian Winter about encoder trends in the wind industry. Check out the article at [www.windsystemsmag.com/article/detail/877/conversation-brian-winter](http://www.windsystemsmag.com/article/detail/877/conversation-brian-winter)or read it here: ### **Conversation: Brian Winter** **Brian Winter** Encoder Product Manager Nidec Avtron Automation [Read More](https://blog.nidec-avtronencoders.com/encoders/wind-energy-qa-with-brian-winter-wind-systems-magazine) Topics: [Wind Power](https://blog.nidec-avtronencoders.com/encoders/topic/wind-power) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/wind-energy-qa-with-brian-winter-wind-systems-magazine](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/wind-energy-qa-with-brian-winter-wind-systems-magazine) - ## [How Stacker Cranes Benefit From Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/stacker-cranes-benefit-from-reliable-absolute-encoders-0-0) Posted by [Brian Winter | View all of Brian's blogs](https://blog.nidec-avtronencoders.com/encoders/author/brian-winter-view-all-of-brians-blogs) on Feb 17, 2015, 8:07:50 AM # Overview ![Stacker_Crane](https://blog.nidec-avtronencoders.com/hs-fs/hub/339119/file-2387987271.png?width=284&name=file-2387987271.png) [Read More](https://blog.nidec-avtronencoders.com/encoders/stacker-cranes-benefit-from-reliable-absolute-encoders-0-0) Topics: [Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/absolute-encoders) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/stacker-cranes-benefit-from-reliable-absolute-encoders-0-0](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/stacker-cranes-benefit-from-reliable-absolute-encoders-0-0) - ## [How Truck Mounted Cranes Benefit From Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/truck-mounted-cranes-benefit-from-reliable-absolute-encoders-0) Posted by [Brian Winter | View all of Brian's blogs](https://blog.nidec-avtronencoders.com/encoders/author/brian-winter-view-all-of-brians-blogs) on Jan 6, 2015, 8:38:53 AM [![](https://blog.nidec-avtronencoders.com/hs-fs/file-2202648206-png/Images/Encoder_Blog_Images/Truck.png)](https://blog.nidec-avtronencoders.com/encoders/truck-mounted-cranes-benefit-from-reliable-absolute-encoders-0) # Overview Truck Mounted Cranes are an indispensable tool on many construction sites. The compact dimensions and mobility of the truck allow the crane to be driven to the work site and set into position. Although the crane may appear small on the truck, once the support system and telescopic mast are extended, it becomes an impressive piece of transport machinery. The operating range of the booms on these types of cranes was once much more restricted, but today, PLC controls and absolute encoder technology ensure that the boom can be pushed to its limits. Absolute encoder technology is used on truck mounted cranes to increase the range and accuracy of positioning the boom, and to increase safety. Absolute encoders are used as part of the safety system that locks the crane automatically before the system reaches critical limits. [Read More](https://blog.nidec-avtronencoders.com/encoders/truck-mounted-cranes-benefit-from-reliable-absolute-encoders-0) Topics: [Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/absolute-encoders) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/truck-mounted-cranes-benefit-from-reliable-absolute-encoders-0](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/truck-mounted-cranes-benefit-from-reliable-absolute-encoders-0) - ## [Container Cranes Benefit From Reliable Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/container-cranes-benefit-from-reliable-absolute-encoders) Posted by [Brian Winter | View all of Brian's blogs](https://blog.nidec-avtronencoders.com/encoders/author/brian-winter-view-all-of-brians-blogs) on Dec 16, 2014, 8:07:00 AM [![](https://blog.nidec-avtronencoders.com/hs-fs/file-2114747717-png/Images/Ship_Cranes.png)](https://blog.nidec-avtronencoders.com/encoders/container-cranes-benefit-from-reliable-absolute-encoders) # Overview [Container Cranes](http://en.wikipedia.org/wiki/Container_crane) are a common sight at ports.  What's new is their improved automation to ensure higher performance and operator safety. To ensure higher performance, OEMs install absolute encoders, typically 4 units: - Each main hoist motor (x2) - Trolley - Boom (angle) OEMs and end-users are depending on the absolute encoders--typically the main hoist encoder positions are compared in software--if there is any difference, the crane will shut down.  Likewise, accurate boom angle and trolley position is critical. Errors can result in crane malfunctions or shutdowns. [Read More](https://blog.nidec-avtronencoders.com/encoders/container-cranes-benefit-from-reliable-absolute-encoders) Topics: [Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/absolute-encoders) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/container-cranes-benefit-from-reliable-absolute-encoders](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/container-cranes-benefit-from-reliable-absolute-encoders) - ## [Crawler Cranes Benefit From Reliable Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/crawler-cranes-benefit-from-reliable-absolute-encoders) Posted by [Brian Winter | View all of Brian's blogs](https://blog.nidec-avtronencoders.com/encoders/author/brian-winter-view-all-of-brians-blogs) on Dec 9, 2014, 2:51:46 PM # Overview ![crawler_crane](https://blog.nidec-avtronencoders.com/hs-fs/file-2070831881-png/Images/Encoder_Blog_Images/crawler_crane.png) [Crawler cranes](http://en.wikipedia.org/wiki/Crane_%28machine%29#Crawler_crane) are a common site on construction sites.  What's new is their improved automation to ensure higher performance and operator safety. To ensure higher performance, OEMs install absolute encoders, often on the winches for boom control and/or hook position. [Read More](https://blog.nidec-avtronencoders.com/encoders/crawler-cranes-benefit-from-reliable-absolute-encoders) Topics: [Absolute Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/absolute-encoders) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/crawler-cranes-benefit-from-reliable-absolute-encoders](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/crawler-cranes-benefit-from-reliable-absolute-encoders) - ## [UL Class and Division Encoders](https://blog.nidec-avtronencoders.com/encoders/ul-class-and-division-encoders) Posted by [Brian Winter | View all of Brian's blogs](https://blog.nidec-avtronencoders.com/encoders/author/brian-winter-view-all-of-brians-blogs) on Jun 11, 2014, 4:00:00 PM [![](https://blog.nidec-avtronencoders.com/hs-fs/file-535598407-jpg/Images/Encoder_Blog_Images/AV45.jpg)](https://blog.nidec-avtronencoders.com/encoders/ul-class-and-division-encoders) In this blog, we'll take a look at encoders that are tested to meet UL Class and Division standards, that is, NEC500 requirements for oil and gas drilling. [Read More](https://blog.nidec-avtronencoders.com/encoders/ul-class-and-division-encoders) Topics: [Top Drive Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/top-drive-encoders), [Oil and Gas Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/oil-and-gas-encoders) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/ul-class-and-division-encoders](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/ul-class-and-division-encoders) - ## [Get Rid of the Claptrap!](https://blog.nidec-avtronencoders.com/encoders/get-rid-of-the-claptrap) Posted by [Brian Winter | View all of Brian's blogs](https://blog.nidec-avtronencoders.com/encoders/author/brian-winter-view-all-of-brians-blogs) on May 28, 2014, 9:00:00 AM [![](https://blog.nidec-avtronencoders.com/hs-fs/file-528676869-jpg/Images/Encoder_Blog_Images/Fig_9.jpg)](https://blog.nidec-avtronencoders.com/encoders/get-rid-of-the-claptrap) Rotary encoders can have their own reliability problems.  So how can you eliminate items around the encoder that decrease reliability on your drilling equipment? [Read More](https://blog.nidec-avtronencoders.com/encoders/get-rid-of-the-claptrap) Topics: [Top Drive Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/top-drive-encoders), [Oil and Gas Encoders](https://blog.nidec-avtronencoders.com/encoders/topic/oil-and-gas-encoders) - [mailto:?body=https://blog.nidec-avtronencoders.com/encoders/get-rid-of-the-claptrap](mailto:?body=https://blog.nidec-avtronencoders.com/encoders/get-rid-of-the-claptrap) - [❮](https://blog.nidec-avtronencoders.com/encoders/page/2) [1](https://blog.nidec-avtronencoders.com/encoders/page/1) [2](https://blog.nidec-avtronencoders.com/encoders/page/2) [3](https://blog.nidec-avtronencoders.com/encoders/page/3) [4](https://blog.nidec-avtronencoders.com/encoders/page/4) [❯](https://blog.nidec-avtronencoders.com/encoders/page/4) ### Reduce Encoder Failures This blog is dedicated to finding and eliminating encoder failures on heavy duty industrial equipment. ###### **Industries**    - Oil & Gas    - Wind Power    - Cranes    - Mining    - Metals    - Marine    - Pulp & Paper ###### **Topics**    - Root Causes    - Design Selection    - Troubleshooting    - Cabling & Associated Equipment ### Subscribe to Email Updates ### Recent Posts ### Post by Topics - [Oil and Gas Encoders (9)](https://blog.nidec-avtronencoders.com/encoders/topic/oil-and-gas-encoders) - [Top Drive Encoders (9)](https://blog.nidec-avtronencoders.com/encoders/topic/top-drive-encoders) - [Absolute Encoders (6)](https://blog.nidec-avtronencoders.com/encoders/topic/absolute-encoders) - [Metals (6)](https://blog.nidec-avtronencoders.com/encoders/topic/metals) - [Encoders (2)](https://blog.nidec-avtronencoders.com/encoders/topic/encoders) [![Share on facebook](https://7528309.fs1.hubspotusercontent-na1.net/hub/7528309/hubfs/raw_assets/public/mV0_d-web-default-modules_hubspot/img/facebook-color.png?width=24&name=facebook-color.png)](https://www.facebook.com/share.php?u=https%3A%2F%2Fblog.nidec-avtronencoders.com%2Fencoders%3Futm_medium%3Dsocial%26utm_source%3Dfacebook) [![Share on linkedin](https://7528302.fs1.hubspotusercontent-na1.net/hub/7528302/hubfs/raw_assets/public/mV0_d-web-default-modules_hubspot/img/linkedin-color.png?width=24&name=linkedin-color.png)](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fblog.nidec-avtronencoders.com%2Fencoders%3Futm_medium%3Dsocial%26utm_source%3Dlinkedin) [![Share on twitter](https://7528304.fs1.hubspotusercontent-na1.net/hub/7528304/hubfs/raw_assets/public/mV0_d-web-default-modules_hubspot/img/twitter-color.png?width=24&name=twitter-color.png)](https://twitter.com/intent/tweet?original_referer=https%3A%2F%2Fblog.nidec-avtronencoders.com%2Fencoders%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&url=https%3A%2F%2Fblog.nidec-avtronencoders.com%2Fencoders%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&source=tweetbutton&text=) [![Share on email](https://7528311.fs1.hubspotusercontent-na1.net/hub/7528311/hubfs/raw_assets/public/mV0_d-web-default-modules_hubspot/img/email-color.png?width=24&name=email-color.png)](mailto:?subject=Check+out+https%3A%2F%2Fblog.nidec-avtronencoders.com%2Fencoders%3Futm_medium%3Dsocial%26utm_source%3Demail&body=Check+out+https%3A%2F%2Fblog.nidec-avtronencoders.com%2Fencoders%3Futm_medium%3Dsocial%26utm_source%3Demail) ### Recent Posts