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  #41  
Old 07-07-2007, 10:27 PM
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Powered Ground Board

It's been a while but I've been having computer problems.

With the top of the telescope finished I started concentrating on the powered ground board.

The first step was to use the router to cut a circle for the ground board. I then proceeded to make the 'feet' keeping in mind that I wanted some distance between the ground and the board I made them 65mm thick.
One of the things that I wanted to do different this time around was to use bearings instead of Teflon on Formica (to see the difference) so that was the next step and from the photos you can see that it has turned out quite well. Once installed I finished it of with dust cover squares made out of Kydex that were glued on in place over the bearings.

There are still things to do to the ground board. I got a Powered Ground Board kit from Gary Myers at StellarCat and that will be the next thing to do.
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  #42  
Old 07-07-2007, 10:34 PM
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awesome ED, missed seeing you at the last few meetings, but mate this is a masterpiece of astronomical proportions! Well done and I am more than impressed, I am ecstatic to see such work and I look forward to the results
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  #43  
Old 07-07-2007, 11:03 PM
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Thanks Houghy, My apologies for not being able to make it to the last NAS meeting.
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  #44  
Old 07-07-2007, 11:06 PM
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Great stuff, and what a plot twist!

I never would have guessed the switch to sealed bearings - Go for it, I hope it works out

This is a great build, and I'm hooked

BTW that powered ground board never misses a beat. A wise choice IMO.
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  #45  
Old 07-07-2007, 11:17 PM
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Quote:
Originally Posted by Orion View Post
Thanks Houghy, My apologies for not being able to make it to the last NAS meeting.
well just don't do it again . I am looking forward to the completion of this project.
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  #46  
Old 08-07-2007, 03:20 PM
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The ground board is now powered. Two pics bottom and top with the pivot bolt.
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  #47  
Old 08-07-2007, 03:32 PM
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That's interesting - the power connector on mine is on the outside face. Is that how they come now?
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  #48  
Old 08-07-2007, 04:47 PM
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Quote:
Originally Posted by AstroJunk View Post
That's interesting - the power connector on mine is on the outside face. Is that how they come now?
You can put it on the out side if you wish, I just wanted it out of the way.
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  #49  
Old 09-07-2007, 06:39 PM
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Gee she's coming along well Eddie.
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  #50  
Old 09-07-2007, 07:22 PM
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Hey thanks Scott..... I'm glad you could tear yourself away from the Deep Sky section to have a look!
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  #51  
Old 23-07-2007, 08:33 PM
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Looking really good Ed .

What size bearings are you using?

Cheers,
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  #52  
Old 23-07-2007, 08:44 PM
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Hi Ian,

ID : 12mm
OD : 37mm
Width :12mm
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  #53  
Old 23-07-2007, 08:46 PM
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Thanks Ed .................. you are giving me some ideas!!
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  #54  
Old 23-07-2007, 08:54 PM
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Glad to be of help. Their web sitehttp://www.smallparts.com.au/cgi-bin...phafile=B=post
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  #55  
Old 29-07-2007, 02:08 PM
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Cutting Ply

I got out in the shed to do a bit more this weekend.

I started on the ply, marking out and cutting the necessary pieces for the mirror box and rocker box out of hoop pine. I then proceeded to laminate two pieces of 15mm ply together for the bottom of the rocker box.

I also made a press to press the large pieces of ply together.
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  #56  
Old 02-08-2007, 10:19 PM
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so how did the pressing turn out ED?
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  #57  
Old 02-08-2007, 10:44 PM
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They turned out great nice and flat and ready to be cut to size.
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  #58  
Old 04-08-2007, 11:22 AM
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Started on the Mirror Box today.

1.. pic shows the box clamped together for a dry run with the mirror cell.
2.. the dowel joints.
3.. awaiting the glue up.
4.. after the clamps have been taken of, mirror cell fits the box perfectly
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  #59  
Old 15-08-2007, 03:38 PM
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Mirror box finished, except for the truss connectors that bolt in the corners and the stain and varnish.

1..back
2..front
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  #60  
Old 15-08-2007, 04:46 PM
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This scope is brilliant, you are a genius Ed, 1 question, what is the wire for which goes across the face of the blue triangles in pic 2, it looks like it is tensioned?
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