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Thread: Hows everyone assembling your pixel grids?

  1. #1
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    Question Hows everyone assembling your pixel grids?

    I'm building a 42 x 64 pixel grid this year (4 x e681 boards) and I'm stuck on how to assemble the grid...

    I want to ensure the pixels are all evenly spaced and pointing in the same direction (preferable straight out from the grid).

    My biggest concern is wind resistance of the finished product... I plan on hanging my grid from a large tree on my property. Winds here reach speeds of about 60km/h (~40mph).
    I know curved surfaces like PVC pipes offer the best flow for wind to pass through, but 64 x 10FT PVC pipes seems very expensive, and probably quite heavy too.

    Any input or direction would be greatly appreciated.

  2. #2
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    Default Re: Hows everyone assembling your pixel grids?

    Maybe chicken wire mounted to support anchors.
    Michael



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    Default Re: Hows everyone assembling your pixel grids?

    Quote Originally Posted by ace_master View Post
    I want to ensure the pixels are all evenly spaced and pointing in the same direction (preferable straight out from the grid).

    My biggest concern is wind resistance of the finished product... I plan on hanging my grid from a large tree on my property. Winds here reach speeds of about 60km/h (~40mph).
    I've used hardware cloth (aka chicken wire), ceiling hangers and fuel hose to make a wind-tolerant structure for incandescent mini-lights. The construction technique might be applicable for your grid, or give you ideas for a better way to do it. Details are in this article:

    http://downloads.eshepherdsoflight.c...d-Captions.pdf

    don
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    Default Re: Hows everyone assembling your pixel grids?

    I considered chicken wire, but not sure how I would set the pixels to point directly out from the wire and still keep them spaced evenly.

    I'm a bit of a perfectionist (as most of us are) and I think I'd end up seeing a lot of slightly off pixels using chicken wire... I'm certainly not cutting chicken wire off the list of possibilities though.

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    Default Re: Hows everyone assembling your pixel grids?

    Quote Originally Posted by djulien View Post
    I've used hardware cloth (aka chicken wire), ceiling hangers and fuel hose to make a wind-tolerant structure for incandescent mini-lights. The construction technique might be applicable for your grid, or give you ideas for a better way to do it. Details are in this article:

    http://downloads.eshepherdsoflight.c...d-Captions.pdf

    don
    That's awesome Don... such a great use for fuel hose.
    My pixels would require one on the front and one on the back of the wire. The big problem with this is the weight... I'd be looking at about 75 square feet of 1/2" wire, about 5500 pieces of hose, plus the weight of all the pixels and the 4 controllers w/ power supplies.

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    Default Re: Hows everyone assembling your pixel grids?

    I made my pixel grid out of 1/2in irrigation pipe(thin wall pvc)

    I used a forstner bit to drill all the holes without chipping the holes.
    The pixels will fit tight but secure.
    Wind was one of my major concerns.
    Not a lot of wind resistance or stress on the wires with this design.

    Each panel holds 4 strings of 42 pixels.
    I have 3 panels, 12 strings, but this could expand to any size.
    Two lengths of 1/2in rebar per panel hold it up and in place
    You are only seeing two panels

    Joel
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    Default Re: Hows everyone assembling your pixel grids?

    Quote Originally Posted by ace_master View Post
    My pixels would require one on the front and one on the back of the wire. The big problem with this is the weight... I'd be looking at about 75 square feet of 1/2" wire, about 5500 pieces of hose, plus the weight of all the pixels and the 4 controllers w/ power supplies.
    That's a fairly large open-air structure. Do you mean that you will have pixels actually pointing frontwards and the backwards, or they would just be mounted there but all facing forward?

    You could build a lattice out of rigid material, or even use rigid pixel strips with air space between each row and column. Another idea would be to use fencing material and tape the pixels to it. I've used that technique (for mini-lights) and it works well - very low wind resistance, keeps the bulbs aligned, and is fairly sturdy. If that type of structure might work for you, I can post additional details about it.

    don
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    Default Re: Hows everyone assembling your pixel grids?

    That's exactly what I had in mind for holding my pixels Joel... just without all the cross's. I planned on doing a horizontal tube for each string, and aircraft cable vertically every foot or so connecting each pipe from bottom to top). But it would be far too expensive for me to do this with mine. What I really liked about the design I had was that it could collapse/roll for storage.


    The pixels would all be facing forward (one sided). I wouldn't mind seeing the fencing/taping method you speak of Don

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    Default Re: Hows everyone assembling your pixel grids?

    could you split/cut the pvc pie down the middle long ways..... cut in half the amount of pipe you buy as well as weight?

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    Default Re: Hows everyone assembling your pixel grids?

    I'm looking at somthing like this.
    http://www.ebay.co.uk/itm/galvanised...item3f0c7904bf
    You can get much cheaper from farmers suppliers. It also comes in a 1.6 mm diameter bar at 2" spacings .
    http://www.ebay.co.uk/itm/WELDED-WIR...item256208c7ab
    Ok its not cheap. But how much have the pixels you are fixing to it cost?

    My idea is to make some 'U' shaped channels from the mesh at the spacing of the pixels (i.e 1" 3" 1" the 1" being the legs of the 'U'). A set of pixel would then be attached to the 1" sides of the 'U' pointing away from the 3" and held all pointing in one direction.
    One of these will be required for each 2 strings (or one string in my case as i'm doubling back a set of 50 to make 2 x 25).
    The remainder of the mesh will form a frame which the 'U' section will be attached and support the feeds to the strings. This will enable me to remove a string if required for repairs and make for easy storage.
    Hope this makes sence. Will post a photo of the prototype when I get chance.
    Last edited by Barnabybear; 01-31-2012 at 05:15 AM.

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