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MichaelW
Carpal Tunnel


Reged: 06/03/06
Posts: 1538
Loc: Cartoon City, Nirvana
Atlas EQ-6 permanent pier mounting
      #987979 - 06/06/06 02:23 PM

So who has mounted an Orion Atlas EQ-6 on a permanent pier? Where did you get the mount adaptor or did you have one made or made it yourself?

I know I designed one for the 1266 way back when so I could do it again, but why re-invent the wheel if it's been done.

Pics would be a bonus if you have any.

I found this one at Breezy Fields Observatory.
http://neo-neighborhoods.com/breezyfields/images/pierandmountsmall.jpg
and
http://neo-neighborhoods.com/breezyfields/images/obroom.jpg
He made it utilizing the Orion refractor extension tube for the Atlas mount. Unfortunately he doesn't have the north locator pin so it moves if it gets whacked bad.

edit: Sorry about he picture size, they are not mine but linked from the Breezy Fields Observatory. I changed them from images to URLS so you can clicky to see.

TIA

--------------------
Michael W
Washoe Zephyr:
Arizona Sky Village:
I miss my AP1200.

Edited by MichaelW (06/06/06 02:29 PM)


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Strgazr27



Reged: 10/04/04
Posts: 7104
Loc: StonyHill Observatory
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #987986 - 06/06/06 02:32 PM Attachment (53 downloads)

WHOA !! Mike they're gonna get ya for image size !

With that said, here's mine when I had it. I made the adapter myself out of 5/8" 6061, a Jig Saw and a belt sander

Attachment

--------------------
Bobby

http://www.strgazr27.zenfolio.com


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MichaelW
Carpal Tunnel


Reged: 06/03/06
Posts: 1538
Loc: Cartoon City, Nirvana
Re: Atlas EQ-6 permanent pier mounting new [Re: Strgazr27]
      #988011 - 06/06/06 02:55 PM

Thanks Bobby!

I fixed the images to urls so not to get my hands slapped.

By coincedence I was visting your website just yesterday, looking at the rebuild page. Very nicely done.

How big is your pier? 12"?

--------------------
Michael W
Washoe Zephyr:
Arizona Sky Village:
I miss my AP1200.


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Strgazr27



Reged: 10/04/04
Posts: 7104
Loc: StonyHill Observatory
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #988042 - 06/06/06 03:20 PM

Mike,

Thanks! The rebuild made a HUGE difference in the mount.

The pier is 12" in diameter, roughly 42" above ground and 48" below grade with a "Bigfoot" ABS footing mold. With about 60 lbs on my CGE a solid rap to the pier shows little to no impact in the image at the EP Very solid.

The setup in the links is nice but I see that it is sitting on just the top of the riser tube from Orion. I drilled a 3" Hole in my top plate which lets the mount sit flush on the top of the pier plate. Another disk underneath with the center bolt in it allowed me to really snug it down. I meade an Az. Adj. pin from a bolt.

CS's

--------------------
Bobby

http://www.strgazr27.zenfolio.com

Edited by Strgazr27 (06/06/06 03:24 PM)


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cbwerner
scholastic sledgehammer


Reged: 08/27/05
Posts: 846
Loc: Maidens, VA
Re: Atlas EQ-6 permanent pier mounting new [Re: Strgazr27]
      #988502 - 06/06/06 08:25 PM

Michael - I just build a 12" pier and used one of Dan's Pier Plates (www.pierplates.com) with the CGE adapter (which you wouldn't need for the EQ-6. They're not cheap, but they're high quality and well worth the money to me. Something to consider if you're not inclined to fabricate it.

Bobby - Great job with the plate! I never would have figured that a jig saw would cut that. BTW - how much concrete did you use? I just did mine - I went down 32" (how did you go further - that distance about killed me!) and am about 42" above grade, and used 700 lbs, not counting the 90 lbs I had to bang off with a sledgehammer when I realized I hadn't left the rebar exposed for when the plate arrived.


Chris.

--------------------
Chris Werner


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MichaelW
Carpal Tunnel


Reged: 06/03/06
Posts: 1538
Loc: Cartoon City, Nirvana
Re: Atlas EQ-6 permanent pier mounting new [Re: cbwerner]
      #993720 - 06/10/06 12:54 PM

I found a suplier in town that has SonoTube in lengths longer than 48".

They have lots of big tube and mostly sell 14" and once in a while carry little 12". Since I'm big on overkill will 14" work ok without impacting scope motion? Or is 12" enough overkill?

--------------------
Michael W
Washoe Zephyr:
Arizona Sky Village:
I miss my AP1200.


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cbwerner
scholastic sledgehammer


Reged: 08/27/05
Posts: 846
Loc: Maidens, VA
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #994161 - 06/10/06 07:04 PM

Mike,

12" is probably enough, and that's the size most people seem to use. But, this is a pain to do and you only want to do it once. If it were me, I'd go for 14" since they're available to you.

I did 12" with 2 48" sonotubes of identical diameters (the stated sizes are nominal and they actually vary slightly). I poured a bunch on concrete in the hole, pushed one sonotube in, made sure it was plumb, filled that up, let it cure, realized I had screwed up by covering the rebar, cut the sonotube off above grade, went back and smashed concrete off to re-expose the rebar, slid the second sonotube over the now dried column base, poured concrete to the desired height, and inserted the bolts and plate into the concrete while jiggling it to get it pretty level using a bubble level.

It never occurred to me to go looking for wider or longer sonotube.

Chris.

--------------------
Chris Werner


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lawrie
Carpal Tunnel


Reged: 01/31/06
Posts: 2083
Loc: Okanagan Valley
Re: Atlas EQ-6 permanent pier mounting new [Re: cbwerner]
      #994290 - 06/10/06 09:09 PM

The big question I have is how do you set the plate correctly or do you just use a compass and roughly north align.
Sorry if the question is dumb.

Lawrie

--------------------
Clear Skies
Lawrie

9.25 Edge/Hyperstar
NP 101is
WO 80fd
G-11/Atlas
ST 8300




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NeoDinian
Experienced Postmaster


Reged: 10/05/05
Posts: 14043
Loc: Rockford Illinois
Re: Atlas EQ-6 permanent pier mounting new [Re: lawrie]
      #994341 - 06/10/06 09:38 PM

Before you do your pour, go out the night before and find polaris. Finding north with a compas is ok, but it will not be true. Once you find polaris, mark your tube appropriatly. use that mark to set your plate. This will be as close as you could probably get without using the telescope and setting circles... From there, fine adjustments are done with the slots on the plate, or your wedge adjustments.

--------------------
Neo... (Jeff)
-=-=-=-=-=-=-
10" LX200-GPS/SMT UHTC "Draco"

Rockford, Il.

NeoDinian's Eye on the Sky!

Coming soon:


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celestial_search
Carpal Tunnel


Reged: 11/18/04
Posts: 2569
Loc: Iowa, USA
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #994503 - 06/10/06 11:31 PM

I have my EQ-6 on a metal pier in my backyard observatory. I had a fabricator make the mounting plate and pier. Not too expensive.

I drilled and tapped the hole for the small dowel screw myself (the azimuth adjustment knobs dowel).

When I was ready to set the position for the pier I had my wife help use a plumb line aligned on Polaris some distance away. I marked a line on the ground. If you get it generally close you can use the azimuth adjustments knobs on the mount to get an accurate polar alignment using the polar alignment scope.

I still try to drift align if practicing my astrophotography.

--------------------
Frank

C-11 XLT
8" f/6 Newt on GEM
Tak FS-102II
SV 80L Triplet APO
EQ-6 Mount on pier in backyard observatory (EQMOD)
CG-5 AS (GOTO)
SBIG ST-5C CCD and Canon Rebel XSI
SSAG
Oberwerk 15X70s and Pentax 10X21s


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cbwerner
scholastic sledgehammer


Reged: 08/27/05
Posts: 846
Loc: Maidens, VA
Re: Atlas EQ-6 permanent pier mounting new [Re: celestial_search]
      #995511 - 06/11/06 08:02 PM

I just used a compass to roughly mark true north on the outside of the sonotube and then aligned one of the bolts with the mark. There is enough ability to adjust in the plate I have so that's all I needed.

--------------------
Chris Werner


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MichaelW
Carpal Tunnel


Reged: 06/03/06
Posts: 1538
Loc: Cartoon City, Nirvana
Re: Atlas EQ-6 permanent pier mounting new [Re: cbwerner]
      #995560 - 06/11/06 08:44 PM

Yep, most plates have quite a bit of latitude by design. I read where one guy spotted celestial north as that crook in the limb on that tree over there. Still came out within tolerances and was able to align after installing the scope. Level is probably less forgiving, but a good level should make it a no-brainer as you can fine tune level with the pier plate and bolts.

FWIW, I set up my Atlas for the first time, I aimed from memory and aimed it over the neighbors chimney about 3/4's of the way to the East edge of the stack. When twilight came and I could see Polaris for aligning the Atlas, I just used the alignment screws to dial it in.

--------------------
Michael W
Washoe Zephyr:
Arizona Sky Village:
I miss my AP1200.


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cbwerner
scholastic sledgehammer


Reged: 08/27/05
Posts: 846
Loc: Maidens, VA
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #995601 - 06/11/06 09:26 PM

Yes, leveling is very different - much more finicky. I made sure my plate was spot on with a bubble level as the concrete cured.

--------------------
Chris Werner


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MichaelW
Carpal Tunnel


Reged: 06/03/06
Posts: 1538
Loc: Cartoon City, Nirvana
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #996169 - 06/12/06 11:36 AM

Quote:

Since I'm big on overkill will 14" work ok without impacting scope motion? Or is 12" enough overkill?


Well last night answered this question for me. 12" is or should I say has to be big enough. While looking at zenith, the camera is darn close to the tripod legs. Had I had another inch, the camera would have made contact with the pier. Now true, I could refrain from zenith operations, but it may be better to be safe than sorry.

Any thoughts on this choice?

--------------------
Michael W
Washoe Zephyr:
Arizona Sky Village:
I miss my AP1200.


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cbwerner
scholastic sledgehammer


Reged: 08/27/05
Posts: 846
Loc: Maidens, VA
Re: Atlas EQ-6 permanent pier mounting new [Re: MichaelW]
      #996225 - 06/12/06 12:23 PM

If you drew a circle around the tripod legs, what would the diameter have been at the contact point? That should tell you if going to 14" will be a problem. It's only 2" difference, so I wouldn't think it would matter, but no point being in doubt.

Regardless, I do think you'll be fine if you stick to a 12" pier.

--------------------
Chris Werner


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