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-   -   What Kind Of Metal Can We Use For FRC? (http://www.chiefdelphi.com/forums/showthread.php?t=111201)

Cal578 15-01-2013 08:43

Re: What Kind Of Metal Can We Use For FRC?
 
Quote:

Originally Posted by Alan Anderson (Post 1215221)
Quote:

Originally Posted by GaryVoshol
Molten metal would probably not be a good idea.

We had some on our Overdrive robot. It passed inspection that year, but I'm not sure it would now.

Mercury?

Alan Anderson 15-01-2013 09:38

Re: What Kind Of Metal Can We Use For FRC?
 
Quote:

Originally Posted by Cal578 (Post 1215673)
Mercury?

Mercury.

Cal578 15-01-2013 10:38

Re: What Kind Of Metal Can We Use For FRC?
 
Quote:

Originally Posted by Alan Anderson (Post 1215221)
We had some on our Overdrive robot. It passed inspection that year, but I'm not sure it would now.

Quote:

Originally Posted by Alan Anderson (Post 1215702)

What rule has changed such that it might not pass now? I would expect that a COTS device, that has passed UL and such, would be ok.

Andy A. 15-01-2013 11:42

Re: What Kind Of Metal Can We Use For FRC?
 
Quote:

Originally Posted by Cal578 (Post 1215726)
What rule has changed such that it might not pass now? I would expect that a COTS device, that has passed UL and such, would be ok.

Quote:

<R08> ROBOT parts shall not be made from hazardous materials, be unsafe, cause an unsafe condition, or interfere with the operation of other ROBOTS.
That'd be enough to give an inspector justification for nixing the above connector. Industrial mercury use is under very close scrutiny, and whether it's a commercial part or not doesn't necessarily matter anymore. My employer, for instance, wouldn't allow it unless I made a very thorough case for having no other practical option, documented a hazmat containment/cleanup plan, and an end of life disposal plan.

That's not to say the connector is illegal by default, just that it's in a gray area. I think any team wanting to use it these days would be facing a pretty hard sell with the inspectors.

Al Skierkiewicz 15-01-2013 12:34

Re: What Kind Of Metal Can We Use For FRC?
 
Under current rules and inspector interpretations, this rotary connector must be designed to work on moving bodies as well as providing rotary connections. Often these devices are not designed nor intended for anything but stationary rotary mechanisms. Vibration, misalignment and shock can cause these to leak and that would bring an event to a halt.


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