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Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 11:39 am

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Mindready, and Tri-M

Postby evanh » Wed Sep 21, 2005 6:39 pm

John Nagle wrote:
It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.


Good to see atleast Tri-M are communicating with you.


Evan
evanh
QNX Master
 
Posts: 737
Joined: Sat Feb 01, 2003 8:04 am

Re: More Tri-M, or the problems of getting ruggedized crunch

Postby John Nagle » Tue Sep 27, 2005 4:48 am

Evan Hillas wrote:
John Nagle wrote:

It's not the power supply. Tri-M is trying to figure out
what's failing.

The problem seems to be airflow related; the packaging
and fan positioning really don't match the motherboard
well.

It's airflow. We blew another NOVA-8890 during field testing.
Temperature 42C at inlet, 68C at CPU heat sink, measured
with an infrared temperature sensor immediately after
removing the cover. The computer's spec said 70C, but
that turns out to be the board, not the systems as cased
with fans. It's in a little box about 1U high, but
the airflow wasn't well worked out. The exhaust fan
for the CPU blows at a steel cover about 5mm from
the fan.

So we're off to the DARPA Grand Challenge with one
computer of three. One is on the vehicle, one is being
shipped back from Tri-M, and one is being shipped to
Tri-M for repair. The one on the vehicle is running
with its top cover off.

What's a good Pentium IV or faster x86 machine with
solidly reliable industrial temperature and vibration ranges?
When we picked these things two years ago there were few
options, but there must have been progress by now? What
are people using for CPU-intensive embedded work in tough
environments?

In retrospect, we should have used a stack of Panasonic
Toughbooks.

John Nagle
Team Overbot
John Nagle
 

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