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FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 08 Feb 2014 (Saturday) 05:24
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Barn Door Tracker

 
xpfloyd
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Feb 08, 2014 10:25 as a reply to  @ post 16673238 |  #16

Kena,

Thanks for taking the time to write this up! Very informative and also answered a few queries I had. Definately something I would like to try myself. Look forward to seeing your shots.

How much roughly did it cost for all the components (not including the plywood, hinges and tools used)?

Eddie


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Kena
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Feb 08, 2014 11:10 |  #17

The motor was £5 (Ebay)
The Arduino was around £13 (Ebay)
the brass rod was about £8 (Ebay)
Nuts and bolts came to about £7 frame various ebay sources and B&Q
2 x 9V battery cases £3 each (Ebay)
Bread board jumper wires £3.50 (Ebay)
Plastic project box £5 (Ebay)
5 pin male/female chassis plug £3.50 from Maplins
Delrin gears were about £7
few other bits and pieces
So i would say a little over £50

I did buy some other odd and ends but never used them as I kept changing my mind as I went along.

I must say I have enjoyed myself doing this. I am thinking of making 2 new wood bits with better measurements and a bit tidier.


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xpfloyd
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Feb 08, 2014 13:07 |  #18

Excellent, thanks again


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xpfloyd
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Feb 09, 2014 08:51 |  #19

The arduino board you listed is £112. Would this be the same part? http://www.ebay.co.uk …rking&hash=item​2572fa6d36 (external link)

Also are these the correct two gears - http://www.bearingshop​uk.co.uk …ed-delrin-500-36673-p.asp (external link) and http://www.bearingshop​uk.co.uk …ed-delrin-500-36657-p.asp (external link)

Thanks


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Feb 09, 2014 09:53 |  #20

The £112.49 one has to be some kind of an error, or a bulk order. The one you linked to should do just fine xpfloyd.

I strongly encourage people buying Arduino products to buy the official licensed stuff (Follow links from the Arduino site). Not only does it help maximize compatibility and ensure examples run on the chip and accessories actually fit as expected, but it also ensures the foundation gets their fair cut of the money to keep things rolling forward.

Good luck with the project.


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xpfloyd
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Feb 09, 2014 10:03 |  #21

Luckless wrote in post #16675798 (external link)
The £112.49 one has to be some kind of an error, or a bulk order. The one you linked to should do just fine xpfloyd.

I strongly encourage people buying Arduino products to buy the official licensed stuff (Follow links from the Arduino site). Not only does it help maximize compatibility and ensure examples run on the chip and accessories actually fit as expected, but it also ensures the foundation gets their fair cut of the money to keep things rolling forward.

Good luck with the project.

Thanks, I'll check the official site out first


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Feb 09, 2014 12:29 |  #22

xpfloyd wrote in post #16675670 (external link)
The arduino board you listed is £112. Would this be the same part? http://www.ebay.co.uk …rking&hash=item​2572fa6d36 (external link)

Also are these the correct two gears - http://www.bearingshop​uk.co.uk …ed-delrin-500-36673-p.asp (external link) and http://www.bearingshop​uk.co.uk …ed-delrin-500-36657-p.asp (external link)

Thanks

That's the correct Arduino but it should be £12.49, there must be a mistake with the listing.
I purchased the stepper motor from the same place and they were delivered within a few days.
Those are the correct gears. As long as they are 16 and 64 tooth gears it will give a ratio of 4:1


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Feb 09, 2014 13:32 |  #23

Thanks again kena, no doubt I'll have a few more questions for you as the parts start to arrive :)


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Feb 09, 2014 15:16 |  #24

Anytime xpfloyd, here to help.
One thing I forgot to mention during my write up is I ordered some nylon shoulder washers from here:
http://www.ebay.co.uk …_trksid=p3984.m​1497.l2648 (external link)
Size SWO25

I placed one of them in the hole on the bottom/base piece of plywood just to lift the 64 tooth up a little as the centre of the teeth should align with the centre of the hinges. It also reduces friction for the gear as it's not rubbing on the wood.


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the ­ jimmy
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Feb 09, 2014 17:45 as a reply to  @ Kena's post |  #25

For those in the states wanting a precision stepper motor with a quartz timed driver board see this site (external link), there is also a lot of good information here if you're building a barn door.




  
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967stuart
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Feb 10, 2014 03:11 |  #26

Excellent instructions, really pleased that you got this up and running, can't wait to see how your pics turn out.




  
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Kena
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Feb 10, 2014 03:34 |  #27

the jimmy wrote in post #16676836 (external link)
For those in the states wanting a precision stepper motor with a quartz timed driver board see this site (external link), there is also a lot of good information here if you're building a barn door.

I learned quite a bit from this site during my research. Very informative, especially his U tube tutorials.


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Kena
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Feb 12, 2014 11:27 as a reply to  @ Kena's post |  #28

Just an update for those following this thread. I set the tracker up in the house again and aligned it to about 55 degrees ( my approximate latitude ) and found that I cannot tilt the camera very far with my sigma lens on, so any objects high up in the sky would be out of reach. It is catching the edge of the top piece of plywood.
So I am either going to move the Giottos ball head as in the picture below or attach a strip of plywood to the top and extend it over the edge to attach the ball head onto.

IMAGE: https://farm4.staticflickr.com/3754/12482939513_9e7c304302_c.jpg
IMAGE LINK: http://www.flickr.com/​photos/k3na1/124829395​13/  (external link)

I think it's current position would be okay with a smaller wide angle lens but not with a telephoto lens attached.

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xpfloyd
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Feb 12, 2014 14:04 |  #29

Can the ballhead be set up anywhere on the top plate? I assumed it didn't have to be on any centreline or at a set offset from the hinge?


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Kena
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Feb 12, 2014 14:30 |  #30

As far as I'm aware it can but I think as close to the hinge as possible. I had to move mine as I couldn't get the adjustment I needed with a longer lens attached.


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Barn Door Tracker
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