HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
mrdon
User Rank
Platinum
Re: ROTARY ENCODERS
mrdon   1/20/2013 8:45:07 PM
NO RATINGS
Hi Jon, Nice summary of the various encoders and their applications to motors. I'll be sharing this material with my Controls Systems class at ITT Tech along with the encoder handbook. I look forward to reading your column on resolvers.

Jon Titus
User Rank
Blogger
Re: ROTARY ENCODERS
Jon Titus   1/20/2013 3:29:21 PM
NO RATINGS
Thanks, Bobj.  My next column will introduce resolvers that produce an analog output.  Interesting devices and a lot more to them that engineers might think.

bobjengr
User Rank
Platinum
ROTARY ENCODERS
bobjengr   1/20/2013 1:14:17 PM
NO RATINGS
Jon, excellent article.   I do considerable work in designing and developing work cells for robotic systems.  Rotary and linear encoders are extremely valuable and accurate and provide just about the only reliable method for determining shaft position--which is critical to the function of the equipment.   Having a basic understanding of how they work is paramount when trying to bring about a "fix" or troubleshooting a problem. Many thanks for the information.

Jack Rupert, PE
User Rank
Platinum
Re: encoder or resolver ?
Jack Rupert, PE   1/19/2013 5:21:50 PM
NO RATINGS
Interesting observation, Jon.  That could be the answer.  Sort of a hybrid system.

Jon Titus
User Rank
Blogger
Re: encoder or resolver ?
Jon Titus   1/12/2013 3:16:53 PM
NO RATINGS
Hi, Jack.

Perhaps the analog encoders use a type of analog-signal detector (magnetic, capacitive...) and then perform the analog-to-digital conversions and information coding within the encoder case.

Jack Rupert, PE
User Rank
Platinum
Re: encoder or resolver ?
Jack Rupert, PE   1/12/2013 3:07:26 PM
NO RATINGS
I don't know about you, but it seems to me that industry in general is really starting to confuse those two words.  I've seen ads for "analog encoders" that talk about their internal technologies that perfectly describe a resolver.  (I also dont' think the 90% of recent college graduates could define one difference).

Jon Titus
User Rank
Blogger
Re: encoder or resolver ?
Jon Titus   1/6/2013 11:05:58 PM
NO RATINGS
The encoders provide an output that immediately indicates position information. A resolver produces signals that require demodulation.  I'll talk about resolvers in another column, coming soon.

GlennA
User Rank
Gold
encoder or resolver ?
GlennA   1/6/2013 10:20:30 PM
NO RATINGS
I have only heard of rotary magnetic coupled devices called resolvers.  The two versions that I have seen are an exciter input and sine and cosine outputs, or sine and cosine inputs and a resultant output.  Another component used with encoders in robotics is the revolution counter - the motor may turn many rotations in an axis' range of motion.



Partner Zone
Latest Analysis
Engineers at Fuel Cell Energy have found a way to take advantage of a side reaction, unique to their carbonate fuel cell that has nothing to do with energy production, as a potential, cost-effective solution to capturing carbon from fossil fuel power plants.
To get to a trillion sensors in the IoT that we all look forward to, there are many challenges to commercialization that still remain, including interoperability, the lack of standards, and the issue of security, to name a few.
Researchers in The Netherlands are testing highway sound barriers that have a two-fold purpose: to block sound and also to harvest solar energy.
This is part one of an article discussing the University of Washington’s nationally ranked FSAE electric car (eCar) and combustible car (cCar). Stay tuned for part two, tomorrow, which will discuss the four unique PCBs used in both the eCar and cCars.
Today, no matter where in the world the device is located, it can call home and ask for the latest-and-greatest firmware with bug fixes and feature updates.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 6 - 10, Building Raspberry Pi Controllers with Python
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.
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