PDB 24V keeps dying

[jsasaki]

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?

[Garten Haeska]

Do you drill over your robot causing them to short out often?

[jsasaki]

Originally Posted by Garten Haeska

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

[Garten Haeska]

Is your Crio electronically isolated from your frame?

[jsasaki]

Originally Posted by Garten Haeska

Is your Crio electronically isolated from your frame?

the whole electronics board is on lexan.

[Garten Haeska]

Yes but lexan can still carry a current for approx. 4-6in. When mounted directly to the frame.

[jsasaki]

what would you suggest for me to do ?

[Garten Haeska]

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.

[jsasaki]

heres a picture

[jsasaki]

nope not getting shocked.

[EricVanWyk]

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.

[its da PAT!!!]

It would be nice to see the other end of the four pin connecter.

[its da PAT!!!]

Also, those wires touching the Crio from the jag in the upper right corner at touch the Crio and those are getting power.

[Cecil]

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..

[jsasaki]

more pictures