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Equipment Discussions >> Observatories

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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: MRBILL0]
      #5965916 - 07/11/13 03:28 PM Attachment (24 downloads)

Quote:

Quote:

If I convert to the double winch system I will need to run the cable through a pulley to obtain a 90-degree turn. Do you think that would cause the metal cable to fray?




Bill,




Nice job using the boomvang. Either cable or rope will eventually fray. But it might be ~5 years or more (?). Change-out would not be too time-consuming. The main difference is that marine hardware uses synthetic sheaves, not steel. It is possible they are less abrasive on rope than steel sheaves on wire-rope. I don't see a problem with a 90° pulley. However, if you use multiple pulleys with a winch, you will need less effort on the cranking due to the 2:1, 3:1, etc., increased purchase of the pulley system. Winches are also available with 2-speed cranking. If you use electric winches, you can use a smaller horsepower motor due to the increased purchase. That equates to less amperage.

Nice job.

Bill Pickard

"The difference between Stupidity and Genius, Genius has its limits." Albert Einstein:1,




Thanks Bill, I have installed two of the $20 winches from Harbor Freight; side by side and they work extraordinarily well. I do so appreciate all your suggestions. Clear skies and of course, “Keep looking up.”
Bill


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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #5978729 - 07/18/13 09:28 PM Attachment (31 downloads)

Well here it is the 18th of July and I have completed the superstructure bracing and installed the much-awaited handrails on my backyard, elevated deck, roll off roof observatory. Budgetary restrictions and 90-degree temperatures dictate the priming and painting of the superstructure, stairs and handrails will have to wait until fall. With much divine providence and a little help from my friends I have managed to design and built an observatory that will afford many hours of viewing pleasure. All in all I must admit this project is well worth the time and money, not to mention the blood sweat and prayers.
Clear skies to all and of course, "Keep looking up."
Bill

Edited by PhaedrusUpshaw (07/18/13 09:30 PM)


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JJK
Carpal Tunnel


Reged: 04/28/08

Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #5978997 - 07/19/13 12:13 AM

Are you going to tie the two near posts (from the pix perspective) together? I would to stiffen the exterior roof support system.

Edited by JJK (07/19/13 12:13 AM)


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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: JJK]
      #5979395 - 07/19/13 09:07 AM

Quote:

Are you going to tie the two near posts (from the pix perspective) together? I would to stiffen the exterior roof support system.




Yes. JJK, I am just waiting on a friend to give me a hand with that particular support brace. I have figured out how to do most of the work by myself, however that one requires two folks.
Clear skies and of course, "Keep looking up."
Bill


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scopefreak
scholastic sledgehammer
****

Reged: 04/14/04

Loc: Mayslick KY
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #5980066 - 07/19/13 04:02 PM

Hey Bill, I don't see a pier column going into your building. Is it hidden or not installed yet?

Nice looking obs, BTW.


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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: scopefreak]
      #5980122 - 07/19/13 04:32 PM

Quote:

Hey Bill, I don't see a pier column going into your building. Is it hidden or not installed yet?

Nice looking obs, BTW.




Thank you for the compliment and your are right -- No pier: stability is achieved through the six underground pillars each 2 ft. wide and 4 to 5 ft. deep (over a ton of concrete). The floor is rock solid and I experience less than a half second shake after focusing. This affords me the ability to move scopes and mounts around as the need dictates.
Clear skies and of course, "Keep looking up."
Bill


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MRBILL0
sage


Reged: 01/17/13

Loc: Los Angeles, CA
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #5981833 - 07/20/13 06:59 PM

Nice job, Bill

Clear Skies!


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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: MRBILL0]
      #5982210 - 07/20/13 11:44 PM

Quote:

Nice job, Bill

Clear Skies!



Thank you Bill, your suggestions comments have been very helpful. Of course we have experienced absolutely no clear skies since my observatory has become operational, which just proves the old adage about the acquisition of new equipment causing cloud magnetism in and around your viewing area. However this too will pass in time.
Clear skies and of course, "Keep looking up."
Bill


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Raginar
Post Laureate
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #5982833 - 07/21/13 11:34 AM

Bill, it's beautiful. Hope you get some good use from it.

At least your lawn is going to appreciate all the water it's gonna gain from your purchase .


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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: Raginar]
      #6056925 - 09/01/13 12:27 AM Attachment (10 downloads)

A few photographs of the completed structure, I still have a bit more painting to do but 90º temperatures and above 80% humidity dictate that I wait till Fall to finish with that.
I want to thank every one of you for your input during this most rewarding project.
Clear skies to all and of course, “Keep looking up!”
Bill


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Raginar
Post Laureate
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #6056943 - 09/01/13 12:39 AM

How's that floor working with the tripods?

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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: Raginar]
      #6057874 - 09/01/13 03:19 PM Attachment (4 downloads)

Quote:

How's that floor working with the tripods?




Hello Chris,
I have an ED80 mounted on the Sirius EQ-G atop a tripod, which is controlled by EQMOD on a PC. All seems to be working well; of course I am not doing any deep sky imaging. My time at the scope is currently spent doing visual observing. I do plan on implementing video capture in the very neat future.
I have also built a triangular base, which raises my XT10 Dob about a foot above the floor. It is filled with 80 pounds concrete, which adds greatly to its stability (photo attached). By the way the photographs you published on your website are outstanding.
Clear skies and of course, “Keep looking up.”
Bill


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Raginar
Post Laureate
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #6058015 - 09/01/13 04:53 PM

That's a really cool don base. Great idea!

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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: Raginar]
      #6058278 - 09/01/13 08:36 PM

Quote:

That's a really cool don base. Great idea!




Well thank you Chris, clear skies to you and of course,"Keep looking up!"

Edited by PhaedrusUpshaw (09/01/13 08:38 PM)


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Raginar
Post Laureate
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Pulley system for roll off roof? new [Re: PhaedrusUpshaw]
      #6058463 - 09/01/13 11:11 PM

Should've read Dob.. I hate I-devices someday's!

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PhaedrusUpshaw
super member
*****

Reged: 04/21/12

Loc: Southwestern Indiana
Re: Pulley system for roll off roof? new [Re: Raginar]
      #6058503 - 09/01/13 11:47 PM

Quote:

Should've read Dob.. I hate I-devices someday's!




Not to worry, I'm sure we all understood
Bill


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