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Unread 23-02-2009, 13:44
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RyanN
AKA: Ryan Nazaretian
FRC #4901 (Garnet Squadron)
Team Role: Mentor
 
Join Date: Jun 2006
Rookie Year: 2005
Location: Columbia, SC
Posts: 1,126
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Re: how many people have had failing jaguars

Quote:
Originally Posted by utlinebacker View Post
If you are participating in a regional event this week, please look for us and say hi! We’d love to meet with you and learn about your experiences with Jaguar. We’ll attempt to drop by each team pit and introduce ourselves.

Regional Event:: Luminary Micro Advisor
Washington, DC:: Brian Kircher & Scott Emley
Cleveland, OH:: Dave Wilson
Manchester, NH:: Kyle Norman
Trenton, NJ:: Paul Jordan
Traverse City, MI:: Tom Fedorko
Oklahoma City, OK:: Scott McMahon
Kansas City, KS:: Joe Kroesche
Chicago, IL:: Bobby Bradford

Here is the weekly status as of Friday (Feb 20th) evening:

Since November, we have received 88 reported failures that we have immediately replaced. Here is a pareto of the complaints:
• DOA:
- Neutral LED – 7
- PWM Missing – 3
- PWM function – 10
• Reverse only – 32
• Forward only - 1
• No voltage on output – 6
• Incorrect output voltage - 4
• Stopped working – 17
• FET melted - 2
• Other – 6

Of those 88 reported failures, we have only received 42 units back to us (still less than half) – which we have analyzed. Here is a pareto of the analyses:
• Flash not programmed – 2
• Customer-induced EOS – 3
• Gate driver U6 failed – 29
• 5V regulator failed – 3
• Missing PWM connector – 3
• Other – 2

We’re hoping we’ll receive more failed units back now that the ship deadline has passed.

My echoing reminder: If you have experienced a failure, PLEASE contact us at support@luminarymicro.com. When you do, PLEASE provide us as much information about your failure as possible (see my questions list here: http://www.chiefdelphi.com/forums/sh...0&postcount=57 – and send us pictures of your system, which are exceptionally helpful for us in understanding your use model). Finally, if you do receive an RMA replacement unit, PLEASE ship us the Jaguar that is giving you trouble. As you can see from above, we have still received only about half of all RMAs we have issued, and ideally, we’d like the opportunity to analyze every failed unit.

Good luck at regionals!

Regards,
Scott
That seems like a lot of Gate Driver failures. Is there a problem with a design or the quality of the components used?
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Garnet Squadron
FRC 4901
Controls Mentor
@rnazaretian

Previous mentor and student from Team Fusion, FRC 364