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brucedownunder2
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Posted: 28 July 2011 at 1:21pm | IP Logged Quote brucedownunder2

I'm playing again....

Just welding ,grinding,painting and generally keeping busy . I hope it all comes out OK .

Iused to get shading with my old elevation/rotating frame ,so decided to give the u-beaut "follow-the-sun" type a go ..

Bruce














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Posted: 29 July 2011 at 12:07am | IP Logged Quote Tinker

Hi Bruce,
Interesting design you got there. You may remember my two axis tracker I posted about here a couple of years ago. Its still going strong but, like everything I build , there is room for improvement.
So my MkII version is well underway now and I'll post pictures when its working. It looks nothing like my MkI or yours, BTW

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brucedownunder2
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Posted: 29 July 2011 at 7:29am | IP Logged Quote brucedownunder2

Yes, A couple have noticed the lack of side bracing.. I've allways intended to add these, just that I've got to get a "aroundtoit" ...

took the trailer down the hill yesterday and got some concrete blend ,so we're in business again..

I'll have to weld up a split 4inch pipe piece with side clamping flanges .

The ground is fairly rocky , so thats in my favor also.

My windgennie anchors are "deadman" style and backfilled with concrete/rock . They ain't goin anywhere fast.

Bruce.

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neil0mac
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Posted: 29 July 2011 at 9:10am | IP Logged Quote neil0mac

brucedownunder2 wrote:
I've got to get a "a round tuit" ...


Better still, Bruce, get a second hand one!

They're a "used tuitt."!

On the question of mounting the pole in the 'rock'. My structural engineer made be embed the pole 600mm into a 600mm diameter hole 2.2 M deep - but in soil.

The 'lift' from a strong wind is very large and his main concern was 'friction' between the mounting and the soil. (Maybe, you could make your rock hole 'bell shaped' at the bottom? Just a thought.)

Aren't car wheel hubs great - no (or very little) machining.

Edited by neil0mac on 29 July 2011 at 9:12am
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brucedownunder2
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Posted: 08 August 2011 at 2:00pm | IP Logged Quote brucedownunder2

Got around to fitting a bit more steel together - the axle is mounted ready for the solar panels . Then the job of fitting some actuators and cabling ..






Close up of the 3.30pm angle ,,turning out OK , so far ..

Bruce





Edited by brucedownunder2 on 08 August 2011 at 3:49pm


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neil0mac
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Posted: 20 August 2011 at 1:00pm | IP Logged Quote neil0mac

Bruce.

Out of curiosity, how many panels (and size) do you intend to swing off that frame?

BTW, I'm even more convinced that a D-I-Y tracker is a good way to go. I'm about to get my meter read for the first time (quarterly) and my 3.6KW of panels has started operating, over the winter months, put out just over 1500 KWHrs to the grid.



Edited by neil0mac on 20 August 2011 at 3:33pm
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brucedownunder2
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Posted: 21 August 2011 at 7:12am | IP Logged Quote brucedownunder2

Hi Neil and Crew
,, It's very strong and if I get the anchoring right ,then it would take 4 800x1600 panels (175 watters) easy. Six , I think would be pushing it a bit ,,we have had 120Kph wind gusts up through the valley to where this contraption is built.

I have no problems with the engineering ,just the "up-lift" is worrying me.

Still looking out for 2X 110 Watt second hand panels if anybody has a few spare under the bed !!..

working on my wind gennie at the moment,so the tracker is on hold for a week or so..

Bruce

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neil0mac
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Posted: 21 August 2011 at 7:32am | IP Logged Quote neil0mac

brucedownunder2 wrote:

I have no problems with the engineering ,just the "up-lift" is worrying me.


Bruce,

It is a simple matter to increase your anchoring with a retro-fit base. Box up a square metre or so (and 100 mm deep?) around your pole and sink 4 holes (300mm? dia) at each corner as deep as you deem necessary. A bit of concrete and some stiff reo and the wind will have to lift your entire back yard (well, almost!)

For some added security (and/or to save concrete mixing/pouring) angle the piers out at say 30 deg for less reliance on 'friction' at the sides of the holes.
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brucedownunder2
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Posted: 21 August 2011 at 7:53am | IP Logged Quote brucedownunder2

Thanks for the advice Neil, are you available next Tuesday ,lol..

I'm 67 now and my property is mountain goat country ,so things around here get done slooooly...

I'm going to do what you said but probably just steel posts in concrete being bolted to the maim pipe.. I have to consider the easiest way because just getting concrete down there is a bucket at a time job.

Ok, see you nice an early tuesday -- dry bread and tea provided lol

Thanks

Bruce.

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Posted: 21 February 2012 at 6:17pm | IP Logged Quote brucedownunder2

Hi Crew ,, Just an update on the tracker project ...

Have sort of nearly finished the input "look and switch" control panel ..The 48v regulator was designed by Ross W and built by Bryan .Thanks .

The panel frame is progressing ,have added a very strong back brace and am nearly ready to mount the panels --the actuators will come later .

Bruce





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windlight
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Posted: 22 February 2012 at 9:09am | IP Logged Quote windlight

Bruce have you filled in under your house, it does not look quite like I remember it, then again maybe it is the remember bit thats wrong.

allan

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brucedownunder2
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Posted: 23 February 2012 at 8:06pm | IP Logged Quote brucedownunder2

Hi Allan ,,

Yes have done a bit ,mostly the concreting and two sides are window and door .

Still to come , gyproc ceilings , stud and cement sheeting back walls .

Presently , setting up the solar tracker /Panel control gear and the Exmork 3Kw windgennie control gear and Battery Banks (48v)

Having fun in the playpen...










hope ya got ya floaties on ,mate.

Bruce

Edited by brucedownunder2 on 23 February 2012 at 8:22pm


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