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Mounting a carputer like this?

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  • Mounting a carputer like this?

    Can't find anything like this - closest is the guy whose HDD is suspended by bungee cord. How about doing it like this, where the whole computer is anchored to the frame of the car by bungee cord and therefore is basically immune to vibration and shock? As the car moves, so does the carputer (but not too much)

    L
    Attached Files
    1996 Volvo 850 T5 CD - Eventually I'll start....

  • #2
    Keep the bungee cords nice and tight - they should eliminate all vibration through elasticity and standing waves

    L
    1996 Volvo 850 T5 CD - Eventually I'll start....

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    • #3
      tHIS HAS been discussed a few times... I'm not sure it is required in any application...

      is this for extra-extra-heavy-heavy off-roading?
      Roy

      2005 Range Rover 4.4
      Any ideas for putting a PC in this? :)

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      • #4
        It is much better to affix the computer to the chassis. The more foam/bungie cords you have the more vibrations you introduce.
        PowerVoice v1 | NaviVoice Source
        GammaControl v2.4
        SKINbedder v3

        1995 Lexus SC300

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        • #5
          you serious, oleel?

          Royn - yes. I shall, all being well, pick up my Range Rover within the fortnight
          1996 Volvo 850 T5 CD - Eventually I'll start....

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          • #6
            Lucky you!

            It is an awesome ride.... I'm sure you'll love it... and yes, you shouldnt have any problems with it fixed down thoroughly... The more sway it has (like not being fixed down strongly) the worst it is... If it is tightened down strongly you will move the somputer only when the car move, and vibration will be minimal...

            I also suggest mounting your HD vertically, with the platters parallel to the wheels of the car, otherwise you will experience a crash (carputer wise ) whenever you hit a bit pothole, or big bump offroad.
            Roy

            2005 Range Rover 4.4
            Any ideas for putting a PC in this? :)

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            • #7
              Originally posted by 0l33l
              It is much better to affix the computer to the chassis. The more foam/bungie cords you have the more vibrations you introduce.
              tis true!

              You car has a high inertia and high damping so accelerations will be low.

              Your PC as it's own system will have low damping and low interia so you could end up with some high G loads and also the PC might go into resonance.

              Also worse case scenario would the be PC moving in resonance downwards as the car is moving upwards so your PC would get a large shock. I think a semi rigin mounting would be better using some very dense AVM (anti vibration mountings) that had a lot of damping but to be honest your new Range rover shoudl be pretty good at absorming bumps.

              if you are really worried you could do a dry (well not so dry) run with some water in a beaker in th case (no PC) and see how much get spilt with various types of mounting, and then try an egg resting on some sharp objects to test for small shocks.

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              • #8
                Scouse: are you serious about the last paragraph??? an image of you test driving your future carpc with a pool stuck on the roof of the 306 just popped into my mind! ehhehee
                Roy

                2005 Range Rover 4.4
                Any ideas for putting a PC in this? :)

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                • #9
                  yeah of course i am serious! i spend half of my time devising testing systems for aerospace structures.materials. Vibrations atesting is something i have never done (I specialise in bolted joints and abrasion at the moment) but you have to test any system to make sure it works how you expect.

                  The proper wat to test would be with you PC with G-force monitors on things like the case, the HDD, the mobo, the CPU heatink etc and see what is going on but using beakers with different heights to measure the severity of the bouncing and somehting fragile to monitor shock absorbtion would be a good home-made sytem. And very repeatable.

                  Simple tests can be good checks! Jut make sure you PC case weighs the same as when your Pc is in it.

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                  • #10
                    Originally posted by RoyN
                    I also suggest mounting your HD vertically, with the platters parallel to the wheels of the car, otherwise you will experience a crash (carputer wise ) whenever you hit a bit pothole, or big bump offroad.
                    I have heard this many times before, but I just went searching on the board and the net to find some proof either way. I came up empty handed.

                    GM has a "Mobile Digital Media System" accessory for their minivans that was built by my company (www.phatnoise.com). Our hard-drive based ARM/Linux computer mounts hanging from the roof and the HDD is flat. We did extensive testing and passed all GM requirements. Is there any actual data someone can point me to that shows mounting parallel to the wheels is better, or is it all just rumor?

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                    • #11
                      its more a theory from what i remember on the discussions. with mounting it perpendicular to the wheels, the heads on the drive are in a configuration where if you create some major G's like slamming the brakes or hitting a tree, the heads have the possibility of vertical movement and hitting the platters. if its parallel to the wheels, the only place the heads may go is parallel to the platter = no platter smashing.
                      Your everyday carpc geek and tech guru at your service. *bow*

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                      • #12
                        and what about a 45* mounting?
                        1996 Volvo 850 T5 CD - Eventually I'll start....

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                        • #13
                          Originally posted by Psychobiker
                          and what about a 45* mounting?
                          Worst of both worlds
                          PowerVoice v1 | NaviVoice Source
                          GammaControl v2.4
                          SKINbedder v3

                          1995 Lexus SC300

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                          • #14
                            1996 Volvo 850 T5 CD - Eventually I'll start....

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                            • #15
                              Originally posted by Vchat20
                              if its parallel to the wheels, the only place the heads may go is parallel to the platter = no platter smashing.
                              Unless you get t-boned..
                              Dr. Ron Paul for President 2008

                              Hope for America - http://www.ronpaul2008.com

                              Who is Ron Paul? - Why do we need Ron Paul?

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                              CarPC Newbs Start Here: All your questions answered, as if by E.S.P.

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