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: trouble shooting on the shop floor...
GlennA   8/13/2013 9:14:54 PM
NO RATINGS
Thinking J;  I agree that asking the operator, or previous technician, why they think there is a problem, what they think the problem is, and what they have done to diagnose, or to fix, the problem, is time well spent.  Sometimes the 'problem' is an attempted fix to a non-existent problem.

GlennA
User Rank
Gold
Re: Bad Timing...
GlennA   8/13/2013 9:03:00 PM
NO RATINGS
Ralphy Boy;  ABB called their robot programming language ARLa; A Robot Language.  I don't remember what Motoman called their programming language.  Early robots used G-code, which I think is now entirely replaced by plain language type programming languages.  Instead of a G-code move command, the syntax is usually something like  'MoveL' for a linear move, or 'MoveJ' for a joint move. 

GlennA
User Rank
Gold
Re: Was it tested?
GlennA   8/13/2013 8:54:52 PM
NO RATINGS
Naperlou;  This was probably a Motoman - this story is several years old.  Most of the robots were Motoman, either L100's or K100's, and one K6, but there were also two ABB IRB 60's, a Miller, a GMF S-420-F, and an ACMA.  The robot had been moved from one building to another, and the workcell had been modified to allow 2 tooling fixtures.  The 'programmer' (and this is a sore point) was a manager who fancied himself a 'robotic welding expert'.  I had several disagreements with the 'experts' during my (short) tenure at Matsu.  It is not unusual to have marginally qualified people program robots - one of the selling 'features' is how easy a robot is to program.  Robots are easy to program, but not easy to program well.

Thinking_J
User Rank
Platinum
trouble shooting on the shop floor...
Thinking_J   8/13/2013 6:51:22 PM
NO RATINGS
Glen did what I have always advocated... spend the time observing the machine AND the operator before taking any other action(s).

Often taking time to review the situation with a good knowledgeable operator is the best usage of time. Bad operators on the other hand...

 

 

Ralphy Boy
User Rank
Platinum
Bad Timing...
Ralphy Boy   8/13/2013 5:21:00 PM
NO RATINGS
Glenn... When working with CNC code generating software is common to have a 'post processor' that takes the general instructions from the GUI CAM screen and writes it as machine/controller specific code.

It looks like this is what you are referring to, or was it the onboard machine code that reads that that was modified?

Either way, I've done some post processor writing and I know that it is easy to miss something such as what you described... and not always easy to debug it later. It's the randomness of the problem you were up against that makes it tough puzzle.

Good on you for picking it out.

Debera Harward
User Rank
Silver
Re: Was it tested?
Debera Harward   8/13/2013 7:25:11 AM
NO RATINGS
Glenn thats really very nice ,i am highly impressed with your analytical and problem detection and solving skills.According to me a good engineer is not the one who just manufactures objects and products but he should have good analytical skills as well .

Charles Murray
User Rank
Blogger
Re: Random vs. pseudorandom
Charles Murray   8/12/2013 6:48:12 PM
NO RATINGS
Indeed, Dave. This looks like choice #2 -- "No one has taken the time to look for a pattern yet."

Dave Palmer
User Rank
Platinum
Random vs. pseudorandom
Dave Palmer   8/12/2013 1:50:04 PM
NO RATINGS
In manufacturing, any defect that's described as "random" just means "I haven't figured out the pattern yet," or maybe "I haven't taken the time to look for a pattern yet."

naperlou
User Rank
Blogger
Was it tested?
naperlou   8/12/2013 9:59:33 AM
NO RATINGS
Glenn, your analysis of and solution to the problem were really good.  You indicate that the robot had been reporgrammed site.  Was this the only robot of this type in use at that site?  What prompted the reprogramming?  From your description it seems that the customer had people who were not qualified programming the robot.  Is this the norm?

<<  <  Page 2/2


Partner Zone
Latest Analysis
Last year you helped Design News and Allied Electronics crown its first-ever Gadget Freak of the Year, and we need your help again. Vote in round 2 of our second-annual contest.
The key to autonomous driving is not to forget about the driver, and to remember that passengers want a sense of control, as opposed to being utterly passive backseat drivers.
HP revealed more of its 3D printing plans in a recent webinar. Senior vice president of inkjet and graphics solution business Stephen Nigro spoke about how the technology works and expanded on HP's vision of open collaboration to commercialize its Multi Jet Fusion 3D printing technology for end-production, and open collaboration on new materials. He also said HP will create software to help users decide when to use Multi Jet Fusion versus conventional subtractive manufacturing.
Get a load of these strange product designs. What's in the water these design engineers are drinking?
The Dutch are known for their love of bicycling, and they’ve also long been early adopters of green-energy and smart-city technologies. So it seems fitting that a town in which painter Vincent van Gogh once lived has given him a very Dutch-like tribute -- a bike path lit by a special smart paint in the style of the artist's “Starry Night” painting.
More:Blogs|News
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.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.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
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.
Last Archived Class
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