PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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Actually in looking at the last picture, it was of the lower truss and we were measuring the upper truss in the pic posted...but you get the idea...
Here's a closeup of the same angle.
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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And here's the end view...y axis is offset 0.125 inches to line up with the hole.
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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When doing conviluted angles over and over it really helps to keep your drawing notes close at hand....like right on the mill table 
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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After milling the relief angle in the first Catch Block its time to mount it on the Back Plate to see if it looks correct before going any further...
Don't even want to think about having to make 8 New Catch Blocks if it wrong!!! 
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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Not bad that way, what about from the side 
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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OK, that look like it will work...back and machine the rest of the Catch Blocks...
Here we have assembled them on the Back Plate. 
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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Next attach the lower mid-ring and tighten up the screws.
Boy is it stiff, and thumping anything and it's like tapping on a lead brick...NO vibration at all
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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Here's a shot showing the relief space that we milled in the lower Catch Blocks.
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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As we said before the upper Catch Blocks were not done with enough angle.
The pic shows the original amount milled on the right and the differance after remilling with 8.5 degrees on the left.
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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So we assembled the upper truss section and this is a shot of the relief. just enough.
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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And finally the assembled OTA with the carbon fiber tubes...
Everything fits very nicely and is not only stiff and vibration resistant, but looks really Cool.
Hope you enjoy the progress as much as I am...
End in sight
Next we will work on the Mount that will attach the OTA to the Paramount...but first, we need to take the lower Truss Tubes out, gage thier length and Locktite the Ball Ends to lenght...
Then reassemble and take careful measurements for the design of the Mounting plate.
Regards,
Preston
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A few I enjoy,
and a few more in the works ;<)
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Pedestal
Post Laureate
Reged: 03/11/06
Posts: 3032
Loc: Smoggy Bottom, Baytown,Texas
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Man, I'm ready to see that puppy on a mount ready to collect some light! I suspect you might be, too....
Hubert
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www.smoggybottom.org
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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Hubert I concure...I want this on the mount ASAP...
But we have to get everything on it right first...
And we are trying...
I hope to be able to get to the primary robotic mirror cover...before the Group takes over the OTA in early December...
Time will tell...
Regards,
Preston
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A few I enjoy,
and a few more in the works ;<)
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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So we have the basic design down for the OTA to Paramound mount down and have the G-Code programed for the lightening...
That's 12+ hours on the CNC router running at 25 inches per minute with a depth cut of 0.050" down each time...3 hours + per pocket for the 4 pockets...
and then we will have many hours of manual machining the bolt holes that are angled to attach to the Back Plate and other areas to be relieved..
It was really telling today that the time away from the programming took time to get back to the basic line...far Too much for my liking...
Pics and design illistrations tomorrow...
Regards,
Preston
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A few I enjoy,
and a few more in the works ;<)
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Sky Captain
Scope Builder
Reged: 11/07/04
Posts: 5731
Loc: Seattle Washington
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Quote:
And finally the assembled OTA with the carbon fiber tubes...
Preston, it's pretty tough to put into words how COOL that scope is!!!!!!!!!!!!!!!
It makes me want to touch it...oh thats right, I did. 
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Equipment Overload!
Kerry.
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Michael Miles
professor emeritus
Reged: 02/11/05
Posts: 603
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Quote:
...
We set up an adjustable angle vise to 45 degrees and are going to mill a 45 degree spot on the edge of the Adjuster Plate that mounts above the upper ring. The End Clamps that attach to the CF vanes can then be adjusted to parellal.
Hi Preston:
The adjuster plate seems awfully long just to adjust the vanes to parallel. Is there some other reason that they are so long? The adjustment mechanism seems very complicated for that functionality also.
Still curious,
Michael
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LXD-75 w/
Stellarvue 102ED
Hardin 10" Newt
Antares 8" Newt
Meade AR-5
Meade N-6
Celestron 102mm refractor
Canon 300D, Meade DSI guiding
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rwiederrich
Goldfinger
Reged: 11/17/05
Posts: 5888
Loc: Bremerton Washington
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Quote:
Quote:
And finally the assembled OTA with the carbon fiber tubes...
Preston, it's pretty tough to put into words how COOL that scope is!!!!!!!!!!!!!!!
It makes me want to touch it...oh thats right, I did.
OH...aren't WE special...... 
My friend John....who is building his 20" here in my shop...finished his mirror(made at MathewsOptical) and is sending it off to CZ for final tests....How cool.
Rob(sorry for the side track)
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www.goldmtobservingcenter.com
Providing a great place for amateur astronomers, and ATM's to come and enjoy their hobby.
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BluewaterObserva
Post Laureate
Reged: 05/18/04
Posts: 4763
Loc: Zuni Mtns, NM
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It may have been covered. But any info on how this attaches to the mount? Or even what mount it's going on?
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Sean Cunneen
professor emeritus
Reged: 08/01/07
Posts: 543
Loc: Blue Island Illinois
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FYI
On page 17 of the thread he explained that he intends to use an Orion Dovetail purchased on Amart.
Oh wait, that was MY scope!
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Sean Cunneen
Blue Island IL
8" f/8 Home built Newt, Discovery mirror, curved vane spider, CG5 Motorized head with Intelliscope DSC, Pier
C102hd CG-4
100mm F4 Cedar Tube RF Refractor
2,3,4,5,6mm Televue Plossls
27T3,33T3,44T3
9-22 Ethos Zoom
NO, I'M NOT SELLING!
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PrestonE
scholastic sledgehammer
Reged: 04/29/05
Posts: 799
Loc: Houston,Texas
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This I think is going on a Paramount ME...
And the mount will be something that will allow sliding it
to the balance point and then bolting it solidly to the mounting plate...hopefully a Paramount Versa Plate...
We have programed the lightening 4 times today and each time something is wrong
I want to run a short demo to be sure what the orientation of the blank is but have yet to produce the correct code 
Hopefully tomorrow will give use some better results...
Best Regards,
Preston
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A few I enjoy,
and a few more in the works ;<)
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