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mark cowan
Vendor (Veritas Optics)
*****

Reged: 06/03/05

Loc: salem, OR
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: kfrederick]
      #5959102 - 07/07/13 02:57 PM

70 lbs?

That looks extremely cool, BTW.

Best,
Mark


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: mark cowan]
      #5959648 - 07/07/13 09:36 PM

Mark no need to say it I am a looser LOL, I just could not stop adding things to the alt bearings. Because they will be part of the link between the primary and secondary I just wanted them to be very strong. Anyway instead of 6 lbs each they were 11 lbs each. I have some other great news, my mirror is off to OMI for coating and Carl told the mirror is one the best he has done. So if shipping is good and it gets turned around in good time I will have it for OSP. I need to get the rocker box done now.

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mark cowan
Vendor (Veritas Optics)
*****

Reged: 06/03/05

Loc: salem, OR
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5959923 - 07/08/13 01:11 AM

I tend to overbuild on prototypes too.

Mark


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seryddwr
Innocent Bystander
*****

Reged: 02/19/10

Loc: La-la land.
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: mark cowan]
      #5960537 - 07/08/13 01:23 PM

I'm planning on making my 20" have direct drive motors. If I come in under 170, I'll be happy. 70 pounds is plenty light IMHO.

Greg


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seryddwr
Innocent Bystander
*****

Reged: 02/19/10

Loc: La-la land.
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: seryddwr]
      #5960541 - 07/08/13 01:25 PM

PS. I have a dedicated 'scope trailer, so I'm not overly concerned about weight.

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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: seryddwr]
      #5961265 - 07/08/13 09:47 PM

This is my trailer for the telescope so weight for me is no big deal but moving it from one spot to another. With the mirror and cell it is mounted in under 33lbs I know I can move it anyware with all other parts lighter than that. Anyway hope to have it complete and ready for first light by July 29th. OSP is AUG 7th so running out of time.



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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5969443 - 07/13/13 06:46 PM

some more work done.
Mirror cell mounted.


Anchor points using Epoxy

27 point cell


Making Alt anchor plates.


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5973601 - 07/16/13 05:57 AM

some bearing for the telescope.




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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5982105 - 07/20/13 10:05 PM

Rocker box is getting done, sure hope I make it for OSP, It is going to be close. I pick up my new mirror from Carl on the 26th. It has the OMI I-Bad 96% coating and I hear nothing but good things about how every aspect of the mirror turned out. I can not say enough good things about Carl at this point and all the work he put into making this get done so I could have it for OSP. On a side not I now have a Servo II controller with error checking encoders which I hope to have installed before OSP as well. Ed Johns is working on some platform parts so I will do what I can to get it all done. Will be nice to have a goto scope with Photo tracking as well. Time is my biggest road block at this point.



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Chriske
Kijkerbouw Urania
*****

Reged: 08/15/04

Loc: Boechout, Belgium
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5982843 - 07/21/13 11:40 AM

Looking great this 'monster' Chris...
Starting to read this thread I would have said 75 lbs.

Chris


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: Chriske]
      #5990720 - 07/26/13 03:59 AM

mirror cell almost done, will pick up mirror on friday. Just need to add cable support. I now have all stablizing pins in place and every point is fully floating.





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cpr1
professor emeritus
*****

Reged: 03/24/12

Loc: Louisiana
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5990798 - 07/26/13 07:11 AM

Hi Chris, Interesting build with the cellular construction. Your very talented.

Do you plan on attaching a fan or fans on the mirror cell?


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: cpr1]
      #5990965 - 07/26/13 09:49 AM

I have a fan for it that I can add if needed, currently the center of the cell is sold but It can be cut out to fit a verity of the different types of fans. With a 1 inch quartz mirror I am going to try it without it first.

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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5991955 - 07/26/13 08:42 PM

I have my new mirror and boy it sure looks grate.

uncovering


The polished back side. Mirror error? Carl did not find any, it is a very very good mirror. Can not wate for first light.


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mark cowan
Vendor (Veritas Optics)
*****

Reged: 06/03/05

Loc: salem, OR
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5993116 - 07/27/13 02:24 PM

Looking good, Chris. Polished back!

Best,
Mark


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: mark cowan]
      #5993384 - 07/27/13 06:01 PM

Thank you mark, I will have it mounted in the cell this week. I have 3 days off next week to complete my telescope, I should get it done so it will work but not all the finish work will be done. Anyway I will do everything I can to get first light at OSP. May need to get someone to help me out with fine tune at OSP. One more photo with the velcro cable aligment system. I will be using the velcro to keep the cable centered at COG .434 inches.



all dressed up to keep it clean while working on it.



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mark cowan
Vendor (Veritas Optics)
*****

Reged: 06/03/05

Loc: salem, OR
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #5993781 - 07/27/13 10:33 PM

As much as I'd love to help fine tuning I won't be doing OSP this year - too much other stuff going on. But take lots of pics!

Best,
Mark


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: mark cowan]
      #6005520 - 08/03/13 10:29 PM

looks like it is going to be very close for OSP. Secondary done, Rocker with ALT motor and encoder done, sling support for primary mirror done. Rotation bearing mounted not done, finish for rocker box not done but not needed to work, trus poles not mounted. I have 4 days left, hope I can find some one to help me out at OSP with tunning the servo controler II? Will do my best.

Cable support


With mirror


Drive motor with encoder and error corecting encoder mounted.


back to work


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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #6020080 - 08/12/13 01:15 AM

OSP was an outstanding success. Full report with photos to follow soon.

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ctcables
professor emeritus


Reged: 11/14/06

Loc: Oregon
Re: The Making of my 20" telescope for a Carl Z mirror new [Re: ctcables]
      #6024218 - 08/13/13 11:49 PM

new 20" in action. Working on full report.


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