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Webster Telescopes Forum • View topic - 28" Scope Build
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 Post subject: 28" Scope Build
 Post Posted: Wed Apr 07, 2010 10:28 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
Hi All,

I’m building a 28” F3.65 scope using parts and advice from Webster Telescopes. Thought I’d share a few pictures of the story so far. I’ll update the pics as the build progresses. Any comments or questions would be great!

I started by getting lucky and finding a brand new Steve Kennedy mirror set. The mirror was made a few years back and had been through two owners, but never put in a scope! I decided to buy a bunch of components from Webster. I’ve also relied on the good will of Eric Webster who has provided great advice and even some dimensions on the mirror box and UTA of their scopes.

So far I’ve learned that building a scope is a whole lot of fun, but man, it takes a ton of time! Next time around, maybe I’ll buy….just dreaming her, but maybe give in to the blissful insanity of a 40”?!?

Regards,

Mark


Attachments:
File comment: Most of the wood parts
wood_peices_parts.JPG
wood_peices_parts.JPG [ 173.52 KiB | Viewed 11109 times ]
File comment: The powered groundboard
groundboard.JPG
groundboard.JPG [ 189.52 KiB | Viewed 11110 times ]
File comment: Used hockey pucks for the feet. This one holds the power connector for the ground board.
hockeypuck_pgb.JPG
hockeypuck_pgb.JPG [ 177.84 KiB | Viewed 11110 times ]
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 Post subject: Re: 28" Scope Build
 Post Posted: Wed Apr 07, 2010 10:31 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
More pics


Attachments:
File comment: An altitude bearing from Webster. I had them anodized black
altbearing.JPG
altbearing.JPG [ 172.72 KiB | Viewed 11103 times ]
File comment: The rocker box. Note the semi-circular cut out in the back corner. This is for the Servocat altitude roller.
rocker.JPG
rocker.JPG [ 166.57 KiB | Viewed 11105 times ]
File comment: The mirror box and UTA rings
mirrorbox_rings.JPG
mirrorbox_rings.JPG [ 166.86 KiB | Viewed 11104 times ]
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 Post subject: Re: 28" Scope Build
 Post Posted: Wed Apr 07, 2010 10:34 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
Last pics for April 7


Attachments:
File comment: UTA tubes cut to length
uta_tubes.JPG
uta_tubes.JPG [ 186.05 KiB | Viewed 11101 times ]
File comment: The first coat of camo black paint to the mirror box
painted_mirror_box.JPG
painted_mirror_box.JPG [ 183.14 KiB | Viewed 11101 times ]
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 Post subject: Re: 28" Scope Build
 Post Posted: Thu Apr 08, 2010 2:58 am 
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Joined: Sun Jan 31, 2010 9:05 pm
Posts: 12
Mark.
That looks awesome. Keep us updated. Can't wait to see the finnished product.
-David.


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 Post subject: Re: 28" Scope Build
 Post Posted: Thu Apr 08, 2010 4:11 pm 
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Joined: Thu Jul 02, 2009 11:48 am
Posts: 80
Location: Detroit Michigan
Mark,

Great craftsmanship!

Your joints give you bragging rights for sure.

_________________
Eric Webster
http://www.WebsterTelescopes.com


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 Post subject: Re: 28" Scope Build
 Post Posted: Fri Apr 16, 2010 10:55 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
Slow but sure progress...a couple of more pictures form this week.


Attachments:
File comment: Mirror box cover
mirrorboxcover.JPG
mirrorboxcover.JPG [ 200.92 KiB | Viewed 11032 times ]
File comment: Mirror box with the baffle and holes for trusses, bearings, mirror cell, and cables
mirror box with baffle.JPG
mirror box with baffle.JPG [ 167.86 KiB | Viewed 11031 times ]
File comment: Rocker box with the ServoCat azimuth motors installed.
servocataz.JPG
servocataz.JPG [ 200.67 KiB | Viewed 11030 times ]
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 Post subject: Re: 28" Scope Build
 Post Posted: Sun Apr 18, 2010 11:49 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
The mirror box in the rocker box. Did this both to test the fit and to find the center point on the altitude axis (for the altitude encoder). I used a method found on the ServoCAT yahoo group. It consisted of shining a red laser on the altitude bearing and finding the location where the laser dot did not move relative to the altitude bearing when moving the mirror box in the altitude axis.

The Webster altitude bearings look nice anodized black!


Attachments:
mirrorandrocker.JPG
mirrorandrocker.JPG [ 177.01 KiB | Viewed 11008 times ]
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 Post subject: Re: 28" Scope Build
 Post Posted: Mon Apr 19, 2010 4:08 am 
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Joined: Sun Jan 31, 2010 9:05 pm
Posts: 12
Wow! Looks really awesome. Sturdy & solid. I hope it's not too big to get up the basement stairs & out the door. LOL! ;) I enjoy working with wood, but have'nt picked-up a project in many years. Maybe I should make a Cats-perch chair, or something? I think the only thing stopping me is I already have too many hobbies. Life's too short & this silly work-thing gets in the way. Hopefully that will change with next week's lottery! -David.


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 Post subject: Re: 28" Scope Build
 Post Posted: Mon May 10, 2010 9:07 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
Thanks for all the encouragement! Thankfully I have double doors exiting my basement, so the scope is not forever trapped!

Follows are some more photos


Attachments:
File comment: Mirror box with ServoCat and Markless Stalks
stalks.JPG
stalks.JPG [ 171.48 KiB | Viewed 10958 times ]
partialuta.JPG
partialuta.JPG [ 180.73 KiB | Viewed 10959 times ]
File comment: Webster mirror cell (sling not yet installed). The bearings on these are awesome!!
mirror cell.JPG
mirror cell.JPG [ 182.69 KiB | Viewed 10959 times ]
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 Post subject: Re: 28" Scope Build
 Post Posted: Tue May 25, 2010 10:12 pm 
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Joined: Thu Oct 29, 2009 11:32 pm
Posts: 9
Got the mirror installed and the UTA finished. Getting closer to first light, hopefully within the next couple of days!!


Attachments:
File comment: Mirror installed in the mirror box.
mirrorinstalle.JPG
mirrorinstalle.JPG [ 185.01 KiB | Viewed 10928 times ]
File comment: UTA top view. Note screwdriver for scale!
uta2.JPG
uta2.JPG [ 201.56 KiB | Viewed 10928 times ]
File comment: UTA side view
uta1.JPG
uta1.JPG [ 200.32 KiB | Viewed 10928 times ]
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