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Unread 03-02-2016, 08:17
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Re: Inexpensive Slip Ring for Turret

Mercotac received that name because they contain mercury. They are not legal for FRC robots.
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Unread 03-02-2016, 08:26
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Re: Inexpensive Slip Ring for Turret

Quote:
Originally Posted by Al Skierkiewicz View Post
Mercotac received that name because they contain mercury. They are not legal for FRC robots.
Thank you Al, your of course correct. I had overlooked that aspect, but as an inspector you of course hadn't. Had just used one in a work application and had it come to mind when I read the question.
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Unread 03-02-2016, 08:32
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Al Skierkiewicz Al Skierkiewicz is offline
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Re: Inexpensive Slip Ring for Turret

This is not to say that Mercotac parts are bad and are in fact used in a variety of applications. I talked to an application engineer at Mercotac and he told me that if temperature or current specs are exceeded, mercury could exit the part, albeit in very small quantities. This is one of those parts that is listed as "mercury wetted" as opposed to "mercury filled" contacts.
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Unread 05-02-2016, 05:53
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Re: Inexpensive Slip Ring for Turret

I agree with the others this seems excessive.

Am curious if one is allowed to manufacture a slip ring using concentric circles of exposed solid copper wire pressed into a non-conductive plate and copper shoes on the opposing plate with a Lazy-Susan bearing as the pivot. I have actually done this before outside of FRC for contraptions but what about on a competition field?
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Unread 05-02-2016, 07:57
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Re: Inexpensive Slip Ring for Turret

R50 Branch circuits may include intermediate elements such as COTS connectors, splices, COTS flexible/rolling/sliding contacts, and COTS slip rings,as long as the entire electrical pathway is via appropriately gauged/rated elements.
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