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Equipment Discussions >> ATM, Optics and DIY Forum

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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6286726 - 01/02/14 12:14 AM

Almost done with the roof


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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6294757 - 01/05/14 08:37 PM

a few pics of the finished shingles.
Remaining exterior work: A little bit more tweaking on the rails to make the roof roll a little smoother, siding of the triangles, finishing touches and paint.
Remaining interior work: drywall, flooring, cutting the bolts for the mount's base plate.

I should be able to bring the mount in here very soon. I am off to CES all of next week, though.






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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6315719 - 01/16/14 12:38 AM

I haven't worked on the observatory but was able to finish the parts for the mount.



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Adam Brunette
member


Reged: 01/13/13

Loc: Charlton, Massachusetts
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6318404 - 01/17/14 11:30 AM

Hello Stephen,

I am curious how you attached the shaft to the block of aluminum, in the last picture.

Looking great!

-Adam


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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: Adam Brunette]
      #6318517 - 01/17/14 12:19 PM

Hi Adam, it is simply threaded. Shaft and counterweight are from AP by the way

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jhayes_tucson
professor emeritus
*****

Reged: 08/26/12

Loc: Bend, OR
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6318578 - 01/17/14 12:49 PM

Stephen,
Hey, it's looking really fantastic!! Keep the pix coming…this is a really impressive project and I totally enjoy all of your updates.
John


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christheman200
sage


Reged: 06/12/13

Loc: Toronto, Canada
Re: 17" CDK and Equatorial Mounting new [Re: jhayes_tucson]
      #6319042 - 01/17/14 04:24 PM

I hope that some day I'll build something as amazing as this!
I truly can't wait to see this come to fruition.


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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: christheman200]
      #6327403 - 01/22/14 12:02 AM

Thanks for the kind words guys

Below is the mount's IO panel. The Sitech controller is on the inside, I've got a USB hub on the outside





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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6367284 - 02/09/14 10:09 PM

I was finally able to resume working on the observatory.
Had to move the 4x4 that's across the roll-off structure to clear the path of the garage door opener mechanism. That was a bit hectic but got it done. Then spent a bit of time trying to make the roof with less force. The rail/bearing wheels have limited play (1/8" on each side) which makes adjusting everything a little more difficult than it should. It's already much better and I think I'll add some steel brackets to keep the critical lumber as straight as possible.
Finished off by installing the garage door opener. Just gotta grab a few of the 1' extension and I think next week-end I should have a working roll-off roof (hopefully xD)



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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6425572 - 03/23/14 10:53 PM

a quick update
we had some good snow and bad weather for about 4-5 weeks in feb/march.
I wasn't happy with the rails and small wheels, it was really hard to roll off - so I decided to replace it with large 2.5" wide aluminum rails and 5" casters. The lumber on which the old rail system was attached to wasn't very straight and it didn't allow for enough play.

It's working much better now, but man that was a project... lifting that roof high enough to install wheels and rails was really hard and tricky. Did it alone which forced me to find a better solution than just brute force and lift the whole thing with enough muscle.

Anyway, just finished it - the install of the garage door opener was MUCH easier than I anticipated. I brought the screw drive for electroless nickel / tin plating to make them rust resistant. Had to find a 3' extension for opener and that wasn't easy. I was glad to see the opener has no trouble opening/closing the roof.

Here's a quick video (poor quality though)

https://www.youtube.com/watch?v=tqcenD3gJa0&feature=youtu.be


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MKV
Carpal Tunnel
*****

Reged: 01/20/11

Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6425731 - 03/24/14 12:27 AM

Stephen, that's awesome, but what happens when it rains?

regards,
Mladen


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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: MKV]
      #6426251 - 03/24/14 10:36 AM

I haven't installed siding to the triangles yet
And the sides will be covered by skirts to protect the inside from rain/snow - I should have mentioned that :P


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tim57064
Pooh-Bah
*****

Reged: 08/23/12

Loc: Southeast South Dakota,USA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6426275 - 03/24/14 10:47 AM

Good to hear you got the opener working better. A pic of the exterior install of the opener would be nice to. Do you have any pic's of the new rollers and the install of them? When you say aluminum rails,do you mean flat plate? A shot of that would be nice. Are the wheels metal or what? Were you able to finish up the new build of the mount?

Edited by tim57064 (03/24/14 10:48 AM)


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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: tim57064]
      #6426307 - 03/24/14 11:05 AM

The aluminum rails are U channels and the casters have metal frame/bearing but urethane/polypropylene wheels.

I'll post some pictures

I've got all the parts for the mount but I was waiting for the ob to be finished before I finalized the assembly as it's already too heavy and I can't the dec assy without making the whole thing impossible to move


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herrointment
Post Laureate
*****

Reged: 03/12/11

Loc: North of Hwy. 64
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6426353 - 03/24/14 11:39 AM

That roof scoots!

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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: herrointment]
      #6426399 - 03/24/14 12:13 PM

yeah I am going to run a couple of metal cable in a cross pattern on the H structure because the roll off beams kind of shake a little bit when the roof is out. xD

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tim57064
Pooh-Bah
*****

Reged: 08/23/12

Loc: Southeast South Dakota,USA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6426421 - 03/24/14 12:24 PM

Wow, +1 Just watched the video myself and that thing does move quite fast. I plan to install an opener myself when it warms up a bit. You can really hear it moving also hope it does not bother the neighbors at night when you close it. Would not think that Urethane wheels would be that loud.

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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: tim57064]
      #6426433 - 03/24/14 12:28 PM

it's mostly the motor/screw drive that you hear. We're the only people living full time there, most neighbors only come here once a month or so

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zytrahus
professor emeritus


Reged: 06/16/09

Loc: Long Beach, CA
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6512654 - 05/07/14 07:25 PM

I got the focuser!
It is one of the first MoonLite CXL 3.6"! (although I am pretty sure I remember Ron saying it's the first one made in this size!! )

Fits perfectly! I already modeled it (I needed the length) so I can design and make the correct extensions and part for it!

On the picture a M94 to M72 adapter is installed to the drawtube. However I will not be using this adapter to conserve backfocus. But I love this M94 thread on the drawtube! The AO will screw in directly into it (Did I mention that I am remaking all the mechanical parts of the AO - so that the unit is stiffer)



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Lightning
sage


Reged: 07/04/10

Loc: Canberra, Australia
Re: 17" CDK and Equatorial Mounting new [Re: zytrahus]
      #6513384 - 05/08/14 06:42 AM

This is crazy cool engineering!

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