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
Following in the tracks of the fabled rocket plane programs of the 1940s, NASA engineers are now laying the plans for a new twist on the future of aviation -- a battery-powered airplane.
Laser engravers can be great tools for DIY projects. But they can also be pricey. Gadget Freak shows you how to build your own CNC laser engraver using an Arduino board.
Your home could someday be filled with hundreds of connected devices. What's going to coordinate it all? According to iRobot, it could be a vacuum with machine vision.
Researchers at the University of Buffalo have developed a nanocavity to potentially improve the design of ultrathin solar panels, video cameras, and other optoelectronic devices.
The Industrial Internet of Things may be going off the deep end in connecting everything on the plant floor. Some machines, bearings, or conveyors simply donít need to be monitored -- even if they can be.
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.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


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 June 28-30:
Sponsored by Proto Labs
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service