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DIY Dobsonian PushTo/GoTo

Dob Equipment Meade DIY
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#1 bguthro

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Posted 15 June 2021 - 04:38 PM

Hello all,

 

I've been searching around, trying to find recent information on this topic - but everything that I've found seems to be a bit dated.

I have an older 10" Meade StarFinder f4.5 produced back in the late 90s.

 

Originally, it would have been sold with the Meade Magellan 1 PushTo system as an optional accessory.

I'd like to see if there were some way of better guiding me to finding DSOs, since I'm still new to this, and still have some difficulty getting small/faint objects in view.

 

I've seen a couple of places advertising the DobsonDream series - which look promising, since they are compatible with SkySafari - but these seem to be telescope model specific...and don't have anything resembling my old scope.

 

I did find this topic - but since the last post there was from 2016, I was hoping that there might be some updated information on this.

 

Can tracking cameras do the equivalent, of knowing where the scope is pointing, for example?

Do these even work, without connecting them to a tracking mount?

 

Any help, advice, or pointers to other threads discussing this is much appreciated



#2 photoracer18

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Posted 15 June 2021 - 04:59 PM

Do you have the Meade GEM or Dob type? The old Magellan I was a decent system  for the GEM mount scopes. I used to have one I was thinking about putting on my DS-16 GEM mount. It has gears that go on the RA/DEC shafts and matching gears on the encoders plus brackets. You would have to find the Magellan kit for your size of mount shaft, 1.5" or 1" depending on the mount because no one makes the gears. For the DOB Meade its actually easier to find parts to build one.



#3 hcf

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Posted 15 June 2021 - 05:23 PM

Some links to threads for PushTo (not GoTo) of various kinds

 

Manual Setting circles

https://www.cloudyni...etting-circles/

https://www.cloudyni...degree-circles/

 

DIY encoder based

https://www.cloudyni...ith-2-encoders/

https://www.cloudyni...for-diy-makers/

 

Phone sensor based

https://www.cloudyni...etting-circles/

 

Camera based (platesolving)

https://www.cloudyni...sual-astronomy/

https://www.cloudyni...sense-explorer/


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#4 bguthro

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Posted 15 June 2021 - 05:31 PM

I have the dob, not GEM. 

 

From what I read, the GEM could be upgraded to the Magellan 2, but not the dob. Not sure if that’s correct or not though. 
 

I haven’t found any used Magellan 1 sets. I did find on unopened box with sensors for $250… but wasn’t sure if that was a reasonable price for the older sensors & computer - since it was more than a new DobsonDream8 kit



#5 Adun

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Posted 15 June 2021 - 05:36 PM

Check out this project for a way to add push-to to a dobsonian using encoders.
 

Can tracking cameras do the equivalent, of knowing where the scope is pointing, for example?
Do these even work, without connecting them to a tracking mount?


Yes, this can be done by using a small computer stick or RPi running platesolving software (astrometry.net) and an USB astro camera (ZWO, RT or similar). This thread mentions some projects


Edited by Adun, 15 June 2021 - 05:40 PM.


#6 bbasiaga

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Posted 15 June 2021 - 09:45 PM

You could also reach out to astodevices, who make the Nexus DSC. It is top of the line, and they have a number of solutions for attaching it to various scopes. They can even do custom parts if necessary.

Brian
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#7 Spile

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Posted 16 June 2021 - 04:00 PM

I use a number of techniques…

SkEye indirect mode can be helpful https://astro.catshi...-to-finder-app/

Screenshots from Stellarium along with a Telrad has helped me locate a number of fuzzies using an asterism 

https://astro.catshi...ng-dim-objects/




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