Posted on behalf of an associate I was at the IMC convention in Florida this past week. All was good, but the one thing that no one seem to touch on, which is the cause of most of our down time, is early detection of wiring breakdown. We have a lot of moving cables, whether its on a robot, in an energy chain, on a drop lift, etc. Most are low voltage, AC and DC. Is there anything out there that addresses these problems? We do the usual inspections, but we get a lot of wiring that breaks down...
Interesting question. There is none that I know of. I wonder if it would be practical to measure resistance changes in the wires. The resistance should go up as the wire thins due to stretching. The changes would probably be in the micro to pico ohm range so it would require special equipment
I agree resistance changes could be detectable, but as stated the change in values will be quite small. Depending on the type of wire, solid/stranded, resistance could also decrease. I assume there are a multitude of cables/connectors that go to the robots and no two are the same? What kind of voltage/frequency is going thru the cables? Using a mV voltage drop from end to end could also be a solution. As the conductor/s break/become weak, this too could indicate impending problems. If you...
Nobot is a set jig, transfer, etc, that might have clamps, location pins, guides, etc, that may need to move every cycle and in our case, move to different positions inside that cycle. Some of these we use motion controls and some we use robot controls without the actual robot. hence.. nobot.
There is a technique named LIRA (Line Impedance Resonance Analysis) which is very effective on low voltage cables from Wirescan Norway ( http://www.wirescan.no/product...able-test-equipment/ ). There must be service providers in USA who could work with you. In India, it is used by the nuclear plants & petrochemical industry. As I have no clients in the automation world, I cannot comment on its suitability for your application. Regards, Aditya
Here is a link to an article on sampling and analyzing greases from robots. This work was initiated by MANTEC (Manufacturing Technology) in York, PA https://www.linkedin.com/pulse...ensure-rich-wurzbach Can put you in touch with some folks who are doing this if needed. Rich Wurzbach
There is one company that has used our wireless GTI sensor to complete a full program for robots. The name of the company is ProMac his name is Ralph Pinson. He does all the robots for Honda for both weld and paint departments. He also does other companies as well. he has developed a great algorithm.
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