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Equipment Discussions >> ATM, Optics and DIY Forum

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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Chriske]
      #6041508 - 08/23/13 09:40 AM

Chriske,
what was the red inline skate wheel for?


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Chriske
Kijkerbouw Urania
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Reged: 08/15/04

Loc: Boechout, Belgium
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Pinbout]
      #6041553 - 08/23/13 10:07 AM

Danny,

If you look closely (and go back one page in the link) You'll notice 2 of these units in that scope. These are DSC, also selfmade. As encoder we use the internal hardware cannibalized from old MS-mice.

Guy, our Elec-guru even made a small PCB for this project. The software we use is from D. Eck.

The bleu colored parts in these DSC-units are selfmade casted resin 'brackets'. Using selfmade (casted) sprockets our largest error during action is about 0.5°.


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Pinbout
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Reged: 02/22/10

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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Chriske]
      #6042107 - 08/23/13 03:57 PM

I got mine down to 12"x12"x5.5" for an 8in mirror. but in the end I made it a little larger [by 1"] to be safe, to make sure everything fits.

designing the model

the model

the result


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davidpitre
Post Laureate
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Reged: 05/10/05

Loc: Central Texas
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Pinbout]
      #6042470 - 08/23/13 08:57 PM

I'd sure be interested if it was a 10".

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Pinbout
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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: davidpitre]
      #6042607 - 08/23/13 10:21 PM

So would I.

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gatorengineer
Carpal Tunnel
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Reged: 02/28/05

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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Pinbout]
      #6043132 - 08/24/13 08:04 AM

Danny nice job as usual, is there an easy way to get 2d drawings out of sketchup? Does sketchup have the ability to export in a format to feed a cnc machine? Thanks

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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: gatorengineer]
      #6043168 - 08/24/13 08:46 AM

I'd have to mod it with the flat artwork included. But you have to mod it again for 1/4"thk mat'l

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steveastrouk
super member


Reged: 08/01/13

Loc: Rochdale, UK
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: gatorengineer]
      #6043276 - 08/24/13 10:09 AM

Yes, extracting flat surfaces is fairly easy. My son and I built a model from Sketchup here
Instructables

Extracted flat surfaces that ended up as DXF files.


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Pinbout
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Reged: 02/22/10

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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: steveastrouk]
      #6043286 - 08/24/13 10:17 AM

That's an awesome project.

How did you use the led tape?


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Chriske
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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Pinbout]
      #6043385 - 08/24/13 11:11 AM

Hi,

This is the travelscope designed by Guy and his crew of University Ghent, the one I was talking about earlier in this thread. As long as its source is always mentioned it can be used freely. This one is a 10". A 12" is also available.



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PierreDesvaux
Vendor (Dobsonian Factory)


Reged: 11/06/06

Loc: Paris, France
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Chriske]
      #6043641 - 08/24/13 01:40 PM

There are almost one hundred 10" Travel scopes built according to the concept developped by Pierre Strock, 10 years ago, in 2003: 7 kg including optics and one box with a volume of 44 x 36 x 16 cm


Pictures deleted by Richard7
All details for the construction are here. It can be easily adapted for a 8" one:

http://www.astrosurf.com/magnitude78/TelStrock/index.html

Edited by richard7 (08/26/13 04:04 PM)


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steveastrouk
super member


Reged: 08/01/13

Loc: Rochdale, UK
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: PierreDesvaux]
      #6043859 - 08/24/13 04:06 PM

I like Mel Bartels' ZipDob. Might be a bit too fast for the current discussion though

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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: PierreDesvaux]
      #6043918 - 08/24/13 04:51 PM

Quote:

There are almost one hundred 10" Travel scopes built according to the concept developped by Pierre Strock,




he's already been mentioned along with his pdf and hand drawn sketches.


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Pinbout
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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Chriske]
      #6043922 - 08/24/13 04:54 PM

Quote:

This is the travelscope designed by Guy and his crew of University Ghent




I'd like to see the cell...


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Pinbout
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Reged: 02/22/10

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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: steveastrouk]
      #6043933 - 08/24/13 04:58 PM

Quote:

I like Mel Bartels' ZipDob.




this one?

http://sketchup.google.com/3dwarehouse/details?mid=f1eaaf10973bdc94bfd7348943...


Yeah I've been thinking about more of a robotics scope that unfolds and sets itself up, even collimates itself, secondary and primary. haven't looked at the prices of the micro servo motors yet.


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Pinbout
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Reged: 02/22/10

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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: PierreDesvaux]
      #6043946 - 08/24/13 05:05 PM

https://sites.google.com/site/dobson2005/dobson400fd3,7

ah this is very beautiful, indeed.


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Chriske
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Reged: 08/15/04

Loc: Boechout, Belgium
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Pinbout]
      #6044067 - 08/24/13 06:56 PM

I've only a 2D sketch to show.
I asked Guy to send me the 3D files.



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steveastrouk
super member


Reged: 08/01/13

Loc: Rochdale, UK
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Pinbout]
      #6044819 - 08/25/13 09:12 AM

Yeah, That 'un. I used the aforementioned tools to strip DXFs from SketchUp and had one of my interns make a laser-cut mockup to see how it hung together last year.

Here's a link, FYI
Picasa link

....and there's a picture of me holding one of Drew Aurigema's ceramic foam cored mirrors - that's an 18"


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Pinbout
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Reged: 02/22/10

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Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Chriske]
      #6044824 - 08/25/13 09:14 AM

Looks like there's plenty of room to turn the collimation bolts around for front collimating.

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Pinbout
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Loc: nj
Re: Any Interest in an 8" Al Travel Scope group build? new [Re: Chriske]
      #6044970 - 08/25/13 10:59 AM Attachment (7 downloads)

i was playing around with a foldable single truss arm 8inf6 that could be mounted to lets say a dm6?

just a thought, not that happy with the web but...


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