Chief Delphi - Blown Talon SR

Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- Electrical (http://www.chiefdelphi.com/forums/forumdisplay.php?f=53)

- - Blown Talon SR (http://www.chiefdelphi.com/forums/showthread.php?t=134532)

ericomoura

13-02-2015 20:07

Blown Talon SR

3 Attachment(s)

After finishing the basic wiring, we thought we should test if everything lights up correctly. Turn on the robot and BOOM! A muffled explosion and a smell of peanut butter. Turns out one of our Talon SRs blew up. We thought it was the internal capacitor and after searching a bit, we found that more people recognized the same peanut butter smell, which confirms our theory.

Attachment 18332
Attachment 18333
Attachment 18334

GeeTwo

14-02-2015 00:09

Re: Blown Talon SR

Peanut butter? People think it strange that I associate the smell of burning resin flux with home (my dad was an avid ham radio builder and operator), but I have never associated the smell of a shorted electrolyte with anything I would even remotely want to eat.

juchong

16-02-2015 10:42

Re: Blown Talon SR

Quote:

Originally Posted by ericomoura (Post 1443620)

Was that one of the Talons that came in the KoP? If not, what year did you buy them? Were they connected correctly when you turned the robot on?

DarrinMunter

16-02-2015 13:28

Re: Blown Talon SR

1 Attachment(s)

We had one of our KOP Talon's from this year, that blew about 10 seconds after we turned power on for the first time. We check wiring, all 3 inches of it back to the PDP, was fine. So I decide to look into it, and found that the capacitor was installed backwards.
Capacitors this size have cut marks on the top to open to allow venting in case of over voltage, or reverse voltage. With this capacitor's top up againts the heatsink, these vent couldn't pop up and open, so the cap blew out the side wall.

Alan Anderson

16-02-2015 13:38

Re: Blown Talon SR

Those remind me of Igor Pravagada, who spent many years experimenting with ways to filter High Voltage AC with polarized electrolytic capacitors. He is credited as the inventor of the electronic confetti generator.

DarrinMunter

24-02-2015 14:25

Re: Blown Talon SR

1 Attachment(s)

Found a capacitor to replaced the one in our blown Talon.
UHE1V102MHD6 - Digikey has stock (FIRST Supplier!!!) Their stock # 493-1589-ND
I have been running this repaired Talon all morning and have had no problems.

Mschmeh144

24-02-2015 16:31

Re: Blown Talon SR

Quote:

Originally Posted by Munter2081 (Post 1449274)

Is that repair first legal?

cgmv123

24-02-2015 16:45

Re: Blown Talon SR

Quote:

Originally Posted by Mschmeh144 (Post 1449348)

Is that repair first legal?

Yes, per R55-M.

Jon Stratis

24-02-2015 16:48

Re: Blown Talon SR

Quote:

Originally Posted by Mschmeh144 (Post 1449348)

Is that repair first legal?

R55:

Quote:

The Driver Station software, roboRIO, Power Distribution Panel, Pneumatics Control Modules, Voltage Regulator Modules, RSL, 120A breaker, motor controllers, relay modules, Wireless Bridge, and batteries shall not be tampered with, modified, or adjusted
in any way (tampering includes drilling, cutting, machining, rewiring, disassembling, etc.), with the following exceptions:
[...]
M. Devices may be repaired, provided the performance and specifications of the device after the repair are identical to those before the repair.

That said, I don't think I would personally use it on a competition robot... Maybe a Practice or parade bot, though.

All times are GMT -5. The time now is 11:31.