HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Blog

More on Rotary Encoders

NO RATINGS
View Comments: Oldest First|Newest First|Threaded View
Cabe Atwell
User Rank
Blogger
Encode
Cabe Atwell   2/6/2013 4:24:53 PM
NO RATINGS
I hope to see more of the Wiegand effect encoders in the near future. It might be a good alternative to optical encoders in a closed loop stepper motor system. Which, by the way, are getting cheap enough for anyone to buy.

 

C

TJ McDermott
User Rank
Blogger
Strong magnetic fields
TJ McDermott   2/7/2013 10:08:37 AM
NO RATINGS
Jon, terrific article.

How sensitive is a wiegland effect encoder to strong magnetic fields?

btwolfe
User Rank
Platinum
Does it work off-axis
btwolfe   2/7/2013 11:19:52 AM
NO RATINGS
In my applications, I often need an axis with a hollow bore, so the position encoder either needs to be hollow. From what I can tell, the Wiegard effect only works when the rotating magnet axis of rotation is centered about the Wiegard wire. I'm sure I've misunderstood the tech in some way and hope that my understanding is wrong.

If my understanding is wrong and the axial rotations do not have to align, then I'd be inclined to merge an optical absolute encoder with a Wiegard sensor for counting rotations. You'd get the resolution of optical with the persistent turn counting of the Wiegard sensor.

Jon Titus
User Rank
Blogger
Re: Strong magnetic fields
Jon Titus   2/7/2013 11:32:32 AM
NO RATINGS
Hello, TJ.  As far as I can tell, the magnetic field for a Wiegand detector must be very localized, so magnetic interference shouldn't become a problem.  Resolvers get used with equipment that uses electric motors, so I bet the manufacturers have added shielding as needed.  Worth asking about before you buy a resolver, and worth the time to run some tests in proximity to specific equipment.

Nancy Golden
User Rank
Platinum
Re: Encode
Nancy Golden   2/8/2013 10:03:49 AM
NO RATINGS
Great article - I particularly liked the mention of using hall effect sensors. Makes sense since historically they have been used as rotary position gear tooth sensors such as crank and camshaft sensing in automotive applications. They are usually a lot cheaper than optical encoders too.

Cabe Atwell
User Rank
Blogger
Re: Encode
Cabe Atwell   2/8/2013 3:53:32 PM
NO RATINGS
Tech novelty aside, what are the prices?

C

Partner Zone
More Blogs
After more than a century of dedicated service, metals are still upping their game and delivering lighter, stronger bodies and frames to the auto industry.
Suppliers are chipping away at the dominance of the venerable polyvinyl chloride (PVC) electrical cable with rollouts of new environmentally safe, recyclable alternatives.
Most machine design engineers will survey existing component manufacturers for standard linear guide products, limiting what they can do with their designs. Using extruded aluminum profile guides can customize machine designs while shrinking the bill of materials.
The new entity, Celera Motion, will continue to sell Applimotion and MicroE kit-style product lines and leverage their combined integrated assembly expertise.
Weaned on the relatively effortless connectivity of today’s massive variety of consumer electronic products, automation users in the IIoT will likely not tolerate too many competing, piecemeal standards for long. And the Industrial Internet Consortium is trying to preempt history.
Design News Webinar Series
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 3 - 7, Developing, Testing, and Troubleshooting IPv4 and IPv6 Using Wireshark
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Course August 25-27:
Sponsored by Stratasys
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service