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New circuit board as strong as steel, because it is steel!

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rparigor(at)SUFFOLK.LIB.N
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Posted: Fri Feb 06, 2009 3:57 pm Post subject: New circuit board as strong as steel, because it is steel!

If anyone is interested, I put up a few pictures of a Sharp AR207 digital copier laser polygon motor assembly that has the circuit board built right onto thin steel sheetmetal.Hmm, wondering if it could be done onto aluminium?Hmm, wondering if you could build boards right inside D-Sub aluminium style shell?Last album:http://www.europaowners.org/modules.php?set_albumName=album258&op=modload&name=gallery&file=index&include=view_album.php   [quote][b]

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henador_titzoff(at)yahoo.
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Posted: Fri Feb 06, 2009 5:54 pm Post subject: New circuit board as strong as steel, because it is steel!

Hmm, just wondering why you would want to build the board onto alumninum and onto the inside of a D-sub aluminnum style shell.  What benefit would that get you?



Regarding glueing the board to aluminum, why can't the aluminum be anodined to accept the glue?

 

Henador Titzoff

From: "rparigor(at)suffolk.lib.ny.us" <rparigor(at)suffolk.lib.ny.us>

To: AeroelectricList <aeroelectric-list(at)matronics.com>

Sent: Friday, February 6, 2009 6:55:15 PM

Subject: New circuit board as strong as steel, because it is steel!



 If anyone is interested, I put up a few pictures of a Sharp AR207 digital copier laser polygon motor assembly that has the circuit board built right onto thin steel sheetmetal.



Hmm, wondering if it could be done onto aluminium?



Hmm, wondering if you could build boards right inside D-Sub aluminium style shell?



Last album:

http://www.europaowners.org/modules.php?set_albumName=album258&op=modload&name=gallery&file=index&include=view_album.php    	  Quote: 	
		  http://www.matronics.com/Navigator?AeroElectric-Listget="_blank" href="http://www.matronics.com/contribution">http://www.ma=====================


	




         [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Feb 07, 2009 10:45 am Post subject: New circuit board as strong as steel, because it is steel!

At 07:51 PM 2/6/2009, you wrote:

 	  Quote: 	
		  Hmm, just wondering why you would want to build the board onto 

alumninum and onto the inside of a D-sub aluminnum style 

shell.  What benefit would that get you?



Regarding glueing the board to aluminum, why can't the aluminum be 

anodined to accept the glue?




	


    There are a host of packaging techniques and

    materials designed to improve the transfer of

    heat from surface mounted components to the outside

    case or other heat dissipating features.



    One of my clients builds a line of brushless dc

    motor driven fans. The motors are in the .4 hp

    class but only about 2" in diameter. They draw

    10-12 amps at 28v in operation. Heat dissipating

    components on the board must have a means by

    which their waste energy is taken away with

    enough efficiency to keep the parts of self-

    destructing in a 70C environment. The boards

    for these drivers are mounted under the 2" diameter

    end bell. They are laminated onto aluminum

    substrates that conduct heat from the components

    to the motor housing.



    Building devices inside some convenient, off-the-

    shelf, INEXPENSIVE enclosure has a lot of attraction

    for designers. I've designed perhaps a dozen devices

    that were assembled on boards that would fit inside a

    d-sub backshell. Here's a little two-day fix I did

    for one of our super-sonic targets at Beech.



http://www.aeroelectric.com/temp/AEC9014B.pdf



    Many others have exploited this

    technique as well. Brother Vern Little's line of

    audio system components are housed in D-sub friendly

    shells. See:



http://www.vx-aviation.com/



    My all-time winner of $cost$/performance ratio for

    a data acquisition system (8 ch, 12-bit, 1000 samples/sec

    on ALL 8 channels) was built into a double-ended

    25-pin dsub shell, ran from a Windows 95 lap-top's

    high performance parallel port and cost me $100.

    You can just see this little critter peeking from behind

    the laptop in . . .



http://www.aeroelectric.com/articles/AA_Bat_Test.pdf



    It's been my experience that getting the electronics

    to work is about 10% of the task. Getting the software

    (if any) to work is 20% of the task. Getting it PACKAGED

    with the minimum of labor, parts count, and procurement costs

    is 30% of the task. Getting it holy-watered by the

    boss, the ACO, and the customer is 50% of the task.



    When you can assemble a device on a board that drops

    into an off-the-shelf, 60 cent enclosure in 2 minutes

    flat, you've made a SUBSTANTIAL improvement on the

    cost of ownership for your product.



    My best guess as to why the board mentioned in the

    start of this thread was bonded to a steel substrate

    is not because it need to be strong but because it

    needed to be cool.

        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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