HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Jack Rupert, PE
User Rank
Platinum
Re: Sometimes resolution is not important, but other things are.
Jack Rupert, PE   1/22/2012 2:34:50 PM
NO RATINGS
Absolutely, Alex.  In my previous position, the MBTF was actually more important than linear accuracy.  It was so true that "others" demanded a spare as part of the standard BOM, rather than on the list of suggestions for our customers.  (It was useful too, when the mechanical system fail and destoyed the position sensor - which actually was working quite well).

GlennA
User Rank
Gold
resolver vs encoder
GlennA   1/6/2012 8:58:52 AM
NO RATINGS
My experience with resolvers was with ABB industrial robots.  The first absolute positioning system I saw used 3 resolvers (IRB 90), followed by 2 (IRB 2000) and finally 1 resolver and a revolution counter (IRB 6400).  The feature I thought was most useful was it 'failed-safe'.  An axis with an encoder has to fail to show movement feed-back when commanded to move to detect a failure.  How far does tha axis move before the lack of position change feed-back causes a fault ?  With a resolver, a broken wire causes a failure during initialization.

TJ McDermott
User Rank
Blogger
Re: Sometimes resolution is not important, but other things are.
TJ McDermott   1/4/2012 10:18:18 PM
NO RATINGS
Environmental protection is frequently a deciding factor in industrial environments.  Can it take being hosed down with high pressure, caustic solutions such as is found in food processing?  Can it resist coolant or oil?

Alexander Wolfe
User Rank
Blogger
Re: Sometimes resolution is not important, but other things are.
Alexander Wolfe   1/4/2012 1:06:19 PM
NO RATINGS
Positional accuracy seems like the key spec when choosing a rotary encoder, but what about MTBF? Does that come into play at all, especially considering that it's a part which gets a heavy and constant workout?

Amclaussen
User Rank
Platinum
Sometimes resolution is not important, but other things are.
Amclaussen   1/4/2012 12:09:48 PM
NO RATINGS
We are using a RVDT to track the opening percentage of large Ball type valves used in Pipelines to monitor closing sequence and speed.  Here, resolution was not necessary, but reliability is of utmost importance; the RVDT is rugged and very reliable.  Amclaussen.



Partner Zone
Latest Analysis
Tesla Motors Inc. took another big step into the battery market last night, officially unveiling a strategy that would enable it to sell batteries into home and grid storage applications.
At some point in the distant future, we may all be driving electric cars. Until then, however, the debate over their ongoing viability rages on.
Machine vision and video streaming systems are used for a variety of purposes, and each has applications for which it is best suited. This denotes that there are differences between them, and these differences can be categorized as the type of lenses used, the resolution of imaging elements, and the underlying software used to interpret the data.
Comic books long have appealed to kids as a fun way to introduce reading and art without being overly didactic. Now a software engineer and project manager from Oklahoma thinks the medium can be used to get them interested in STEM careers.
Sherlock Ohms highlights stories told by engineers who have used their deductive reasoning and technical prowess to troubleshoot and solve the most perplexing engineering mysteries.
More:Blogs|News
Design News Webinar Series
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
5/7/2015 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.
May 4 - 8, Designing Low Power Systems using Battery and Energy Harvesting Energy Sources
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.
Last Archived Class
Sponsored by Proto Labs
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