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Unread 18-02-2012, 00:32
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PDB 24V keeps dying

The 24V ports on our PDB keep dying. The green LED stops lighting up after seconds of running our robot. So far we have 3 broken power distribution boards.... An ideas why?
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Unread 18-02-2012, 00:35
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Re: PDB 24V keeps dying

Do you drill over your robot causing them to short out often?
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Unread 18-02-2012, 00:36
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Re: PDB 24V keeps dying

Quote:
Originally Posted by Garten Haeska View Post
Do you drill over your robot causing them to short out often?
nope. This is our third PDB and I just changed it 10 min. ago. drove for about a minute and it stopped
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Unread 18-02-2012, 00:40
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Re: PDB 24V keeps dying

Is your Crio electronically isolated from your frame?
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Unread 18-02-2012, 00:43
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Re: PDB 24V keeps dying

Quote:
Originally Posted by Garten Haeska View Post
Is your Crio electronically isolated from your frame?
the whole electronics board is on lexan.
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Unread 18-02-2012, 00:46
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Re: PDB 24V keeps dying

Yes but lexan can still carry a current for approx. 4-6in. When mounted directly to the frame.
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Unread 18-02-2012, 00:47
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Re: PDB 24V keeps dying

what would you suggest for me to do ?
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Unread 18-02-2012, 00:49
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Re: PDB 24V keeps dying

When you touch the robot do you might get shocked but when you touch say a bolt on your lexan board do you get shocked? If so you need to isolate your board.
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Unread 18-02-2012, 00:55
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Re: PDB 24V keeps dying

heres a picture
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Unread 18-02-2012, 00:56
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Re: PDB 24V keeps dying

nope not getting shocked.
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Unread 18-02-2012, 01:33
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Re: PDB 24V keeps dying

Garten, I'm very confused by several of your responses in this thread. Do you have data to support your claims that Lexan can conduct electricity 4-6 inches and that the voltages on the robot are sufficient to cause noticeable electric shock?

Jsasaki, verify frame isolation with a meter. Then, check the insulation on the wires coming off the right hand side 40A breakers - you may be shorting there.
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Unread 18-02-2012, 01:36
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Re: PDB 24V keeps dying

It would be nice to see the other end of the four pin connecter.
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Unread 18-02-2012, 01:40
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Re: PDB 24V keeps dying

Also, those wires touching the Crio from the jag in the upper right corner at touch the Crio and those are getting power.
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Unread 18-02-2012, 01:43
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Re: PDB 24V keeps dying

Looks to me like the wire on the 5 volt camera plug is a little long.. Either that, or it's something blocking my view..
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Unread 18-02-2012, 01:45
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Re: PDB 24V keeps dying

Quote:
Originally Posted by Cecil View Post
Looks to me like the wire on the 5 volt camera plug is a little long.. Either that, or it's something blocking my view..
Yea I saw that too.
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