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FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 09 Sep 2013 (Monday) 04:57
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Tracking mount (Barn door)

 
Shane ­ W
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Feb 04, 2014 05:36 |  #46

I too need some help figuring out this barn door tracker thing! I have built mine according to Gary's page- here.. http://www.garyseronik​.com/?q=node/52 (external link)

I am stuck with the motor control circuitry! I 'attempted" to build one myself but my electronics soldering skills are lacking! Is there a controller or circuit board on eBay that I can just buy and plug in to this exact motor or do I need to find someone who knows how to build this?

Any help or advise would be greatly appreciated!


Shane W

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alliben
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Feb 04, 2014 10:05 |  #47

I'm in the process of collecting components for my own BDT. I contacted the man belonging to this site, https://sites.google.c​om …tar97/home/quar​tz-stepper (external link)

He used to sell BDT in the 80's. He uses a stepper motor which I believe is superior to the DC motor.
He built a driver board and timer for a stepper for me. Perhaps if you showed him the circuit you want for your DC motor, he would build what you need for a good price.




  
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pwm2
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Feb 04, 2014 11:11 |  #48

Yes, a stepper motor design is definitely superiod.

A microcontroller is very good at measuring time. And a stepper motor have a fixed number of steps for one revolution. So it is easy to get a drive that keeps a very exact tracking speed.

With a DC motor, you need to try to adjust the DC voltage until the motor rotates at a suitable speed. Problem is that temperature and remaining battery capacity and weight of the camera gear will make the DC motor speed vary.


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Kena
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Feb 04, 2014 15:24 |  #49

Hi Stu
I'll post a separate thread once i've done some testing. Have just been letting it run in the house testing it with various lenses with regards to weight and timing of the gears. I Tested it for a few minutes with the 5d3 and Sigma 120-400 OS lens yesterday and the small stepper handles the weight without any problems, which i'm very happy with as I thought the motor wouldn't handle the weight of this combination. Attached a red dot finder today and aligned it so now just need a clear night and some time to get out and do a proper test. If all goes well I start a thread with how I built it and what parts and where I sourced them from.
Here is a teaser with the 5D3 and 24-70 L lens

IMAGE: http://farm6.staticflickr.com/5541/12207055293_e359a0da22_c.jpg
IMAGE LINK: http://www.flickr.com/​photos/k3na1/122070552​93/  (external link)

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967stuart
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Feb 05, 2014 06:21 |  #50

Nice one bud, looks great, fingers crossed for some clear sky for you!

Please PM me when you post your thread.

Thank you




  
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xpfloyd
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Feb 05, 2014 06:43 |  #51

Kena wrote in post #16663465 (external link)
If all goes well I start a thread with how I built it and what parts and where I sourced them from.

Looks good! Can you post a link to the thread in this thread so I dont miss it. Thanks


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Kena
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Feb 08, 2014 05:26 |  #52

I have started the thread requested and will add to it over the next few days. Thread can be found here:

https://photography-on-the.net …p?p=16673084#po​st16673084


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967stuart
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Feb 12, 2014 09:38 |  #53

Ken has kindly helped me out with the code for arduino and mine too is now running at the correct speed YAY!! (cheers Ken)

Have ordered up the other parts so hopefully can start some build work soon!




  
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xpfloyd
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Feb 12, 2014 14:05 |  #54

would it be cheeky to ask either Ken or stuart for the code too?


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Kena
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Feb 12, 2014 14:28 |  #55

No Probs XP, drop me a pm with your email address and i'll sort it for you.


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xpfloyd
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Feb 12, 2014 14:56 |  #56

done, thanks


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967stuart
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Feb 15, 2014 05:06 |  #57

Sorry bud, only just seen this, glad Ken got you sorted.




  
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xpfloyd
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Feb 15, 2014 05:15 |  #58

No probs Stuart, Ken was kind enough to send it over


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Tracking mount (Barn door)
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