HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 2/2
GlennA
User Rank
Gold
Re: alarm or fault memory
GlennA   6/4/2012 9:46:44 AM
NO RATINGS
TJ McDermott;  Yes, too many alarm messages can also be a problem.  The ABB IRB 6400 S4c controller had several message lists, and a general list.  And some alarms would generate a secondary message, or even a tertiary message;  e.g. on a servo fault, each of the 6 axes would reply with a shutdown message.  It took some time to sort through the alarms to get to the primary error.

TJ McDermott
User Rank
Blogger
Re: alarm or fault memory
TJ McDermott   6/4/2012 9:40:24 AM
NO RATINGS
Alarm history is vital when there is more than a handful of alarms to track.  On the other hand, having a hundred alarms to sort through can be just as difficult as the intermittent one.

naperlou
User Rank
Blogger
Re: alarm or fault memory
naperlou   6/4/2012 9:34:17 AM
NO RATINGS
GlennA, I was working for a company that made simulators at one time.  I was involved in a R&D project to track errors and predict faults.  It was very interesting and an early application of AI in a real-time system.  We acutally logged every fault, even intermittent ones.  I learned about this working on satellites, actually.  Having an indicator that just blinked is not really useful, you need to keep that information.

GlennA
User Rank
Gold
alarm or fault memory
GlennA   6/4/2012 9:00:55 AM
NO RATINGS
Intermittent or momentary faults can be very hard to find.  On some machines, where possible, I added a latch to the alarm.  Other times, you just had to watch for the error.  One of the machines that I worked on had an air blow for spindle cleaning during tool change.  If the air pressure dropped below the switch setting the machine Emergency-Stopped on low air.  As soon as it stopped and shut off the air blow, the pressure built back up above the switch setting, and the error automatically reset .  Machine operators were notorious for not paying attention, so the complaint was usually "the machine just stopped".  Often the fix was just replacing the air supply hose with a shorter, larger diameter hose.

<<  <  Page 2/2


Partner Zone
Latest Analysis
It's been two years since the Mac Mini's last appearance on iFixit's teardown table, but a newly revised version joins Apple's lineup this week.
More often than not, with the purchase of a sports car comes the sacrifice of any sort of utility. In other words, you can forget about a large trunk, extra seats for the kids, and more importantly driving in snowy (or inclement) weather. But what if there was a vehicle that offered the best of both worlds; great handling and practicality?
Kevin Gautier of Formlabs describes the making of a carbon fiber mold for an intake manifold, using a $3,300 3D printer, during Medical Design & Manufacturing Midwest.
Science fiction author Isaac Asimov may have the best rules for effective brainstorming and creativity. His never-before-published essay, "On Creativity," recently made it to the Web pages of MIT Technology Review.
Much has been made over the potentially dangerous flammability of lithium-ion batteries after major companies like Boeing, Sony, and Tesla have grappled with well-publicized battery fires. Researchers at Stanford University may have come up with a solution to this problem with a smart sensor for lithium-ion batteries that provides a warning if the battery is about to overheat or catch fire.
More:Blogs|News
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 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.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


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 Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Next Class: 11/11-11/13 2:00 PM
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service