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ctcables
Vendor (Reco Labs)


Reged: 11/14/06
Posts: 151
Loc: Oregon
Quartz? Anyone looking for blanks? new
      #1345524 - 01/07/07 04:14 AM Attachment (136 downloads)

I know that there are many quartz blanks out there now and just wanted to know if any one has finished one? If so how did it turn out? Any information from people that have worked with quartz would be great, I realy want to know more first hand information from users. Thank You and if you need a quartz blank just let me know I have many quartz mirror blanks.

Attachment

Edited by Don W (01/08/07 11:26 PM)


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Biff
Carpal Tunnel


Reged: 09/04/05
Posts: 2562
Loc: Tampa, FL
Re: Quartz? any one working with it? new [Re: ctcables]
      #1345841 - 01/07/07 11:04 AM

Quartz eh? Sounds expensive.

--------------------
Ryan


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lukasik
Carpal Tunnel


Reged: 10/11/05
Posts: 1892
Loc: Lawrenceville, Georgia
Re: Quartz? any one working with it? new [Re: Biff]
      #1345882 - 01/07/07 11:25 AM

Hi Chris,

I made a 10" f5.47 flexed mirror from a 10" x .600" piece of quartz. I've been very happy with it. It may have taken longer to polish than more commonly used glasses - I'm not really sure. I spent so long chasing the figure that by the time I got it right the mirror was no doubt polished.

Regards,

Bob


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ctcables
Vendor (Reco Labs)


Reged: 11/14/06
Posts: 151
Loc: Oregon
Re: Quartz? any one working with it? new [Re: lukasik]
      #1346339 - 01/07/07 02:48 PM Attachment (98 downloads)

.6 that is thin, do you knonw what grade quartz it is? Have you used it much and if so how is it responding to temp changes? Did your blank have any stig? I have a 14.5 inch by .8 inch on a 18 PT cell and have seen no flex and it seems to cool very fast. What is the weight of your mirror? I find by using the quartz you can get the same stranth with a much lighter mirror blank which is great for light dob setups. Thank you for the information I have many of the blanks and have been selling them on E-Bay for a very good price and so far every one is happy but no feed back on any completed mirrors yet. So I just have mine to gather information from and the 2 biggest things I see is that is light and responds very fast to temp changes. Again thank you for the information and if you have more please let me know.

Attachment

--------------------
Telescope
F4.5
14.6 inch Fused Quartz Mirror strehl .996
18 PT carbonfiber mirror cell
Antearies Quartz secondary
2 strut carbonfiber
Feather Touch focuser
Main scope is 31 lbs
Time to build off and on for a year.


Edited by ctcables (01/07/07 02:54 PM)


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lukasik
Carpal Tunnel


Reged: 10/11/05
Posts: 1892
Loc: Lawrenceville, Georgia
Re: Quartz? any one working with it? new [Re: ctcables]
      #1346414 - 01/07/07 03:27 PM

Hi Chris,

the blank started out at 1" thick, and due to my own foolishness had to be ground down to .6" to remove a giant clam flake in the backside. This happened after grinding and before the start of polishing.

As far as the grade goes I am uncertain. The blank was a freebie, but may have originated at Heraeus. I saw some astigmatism show up during polishing (my fault) and I'm pretty sure I got rid of it. This mirror was polished to a sphere and is flexed into a parabola. There is always a chance of introducing astigmatism from a non-uniform adhesive job (another mistake I made). I think there is a very tiny little bit of stig remaining but I don't yet know if its in the primary or maybe my secondary.

I think the thermal behavior is really good. I haven't made any kind of measurments, that's just my opinion. I never did weigh the thing as my scope is so grossly overweight that it doesn't matter. I have been using it for 2 years now. I tend to do more planetary and lunar imaging than anything else, and the performance seems pretty good.

A fellow ( I think at the optical machine shop that saved my blank) told me that because quartz is so hard it can be polished to an extremely smooth figure. Mine does seem to be very smooth. Nice looking blanks in the photo - what is the origin of these?


regards,

Bob


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ctcables
Vendor (Reco Labs)


Reged: 11/14/06
Posts: 151
Loc: Oregon
Re: Quartz? any one working with it? new [Re: lukasik]
      #1346786 - 01/07/07 06:24 PM Attachment (105 downloads)

Bob I had to work very hard to get the quartz so for now I am the sorce. I saw somthing that ATM users could use and I wanted to provide a sorce at a price to as good or better than pyrex. I have 6 inch blanks for around $80 and 14.5 inch blanks around $300.00 so I think the price is good. I can not go much lower as I need to pay for it and the work to get it into a blank. I want to get quartz to ATM users that have not had the chance to get because in the past the price has been so high. I can say Price will no longer be the problem but overcumming fears of thicknes and working it. That is why I want to get as much info I can so I can understand what if any problems there will be with working the quartz. I know it can be done because I have a very nice 14.5" that was done by Mark Cowan and I hope that other good mirror makers will look at using quartz.

Attachment

--------------------
Telescope
F4.5
14.6 inch Fused Quartz Mirror strehl .996
18 PT carbonfiber mirror cell
Antearies Quartz secondary
2 strut carbonfiber
Feather Touch focuser
Main scope is 31 lbs
Time to build off and on for a year.


Edited by ctcables (01/07/07 06:26 PM)


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kingjamez
scholastic sledgehammer


Reged: 10/03/06
Posts: 996
Loc: Washington D.C.
Re: Quartz? any one working with it? new [Re: ctcables]
      #1347090 - 01/07/07 09:10 PM

------------------------
and 14.5 inch blanks around $300.00
------------------------

Wish I'd gotten mine for that ;-)

--------------------
C8 on Atlas with EQMOD
ETX125 UHTC
Celestron Onyx 80mm
Meade Walmart 60mm guide scope
Canon Xsi Modified w/IDAS LPR
Gen 3 NightVision Eyepiece
Aspiring Optician
Watch my Wiimote control Atlas:
http://www.youtube.com/watch?v=PnmkygmGNiM


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ezpcb
Vendor (Nova Instrument)


Reged: 06/07/06
Posts: 348
Loc: China
Re: Quartz? any one working with it? new [Re: kingjamez]
      #1347303 - 01/07/07 10:44 PM

ctcable, the price sounds good

--------------------
10"/f8, TMB130/f9, 10"/f4.5, 105 carbon tube APO
Pentax 100, StarInstrument RC10(in construction)
6" Mak-Newt
Takahashi NJP Mount
many other accessories



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Undermidnight
BEOTS "Tweener Cup" winner


Reged: 05/25/04
Posts: 3411
Loc: Hilliard, Ohio
Re: Quartz? any one working with it? new [Re: ezpcb]
      #1347937 - 01/08/07 10:48 AM

A friend of mine just bought a 14" Quartz, 7/8" blank off of Ebay for about the same price. I am curious of the quality of these blanks.

Jason

--------------------
"There's only two things that excite a man, expensive toys and real expensive toys." - Red Green

WO Zenithstar 66 on Microstar Mount
8" Ultima 2000, "Wilma"
8" F/4.2 Ultralight, "Marilyn II"
12.5" F/4.3 Ultralight, "Ada II"
11x70 Oberwerks
6" F/6 Figuring
Pans, Orthos, and Naglers
"We who cut mere stones, must always be envisioning cathedrals." - The Quarry Workers Creed

http://www.undermidnight.com


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ctcables
Vendor (Reco Labs)


Reged: 11/14/06
Posts: 151
Loc: Oregon
Re: Quartz? any one working with it? new [Re: Undermidnight]
      #1348467 - 01/08/07 03:03 PM

As I am the only one selling these right now he most likly got it from me. So just ask him, all reports have been outstanding. No strain and work very even but I have no reports back on finished ones and that is what I am looking for.

--------------------
Telescope
F4.5
14.6 inch Fused Quartz Mirror strehl .996
18 PT carbonfiber mirror cell
Antearies Quartz secondary
2 strut carbonfiber
Feather Touch focuser
Main scope is 31 lbs
Time to build off and on for a year.


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Undermidnight
BEOTS "Tweener Cup" winner


Reged: 05/25/04
Posts: 3411
Loc: Hilliard, Ohio
Re: Quartz? any one working with it? new [Re: ctcables]
      #1348478 - 01/08/07 03:11 PM

Quote:

As I am the only one selling these right now he most likly got it from me. So just ask him, all reports have been outstanding. No strain and work very even but I have no reports back on finished ones and that is what I am looking for.




Cool! I may want one now!

Jason

--------------------
"There's only two things that excite a man, expensive toys and real expensive toys." - Red Green

WO Zenithstar 66 on Microstar Mount
8" Ultima 2000, "Wilma"
8" F/4.2 Ultralight, "Marilyn II"
12.5" F/4.3 Ultralight, "Ada II"
11x70 Oberwerks
6" F/6 Figuring
Pans, Orthos, and Naglers
"We who cut mere stones, must always be envisioning cathedrals." - The Quarry Workers Creed

http://www.undermidnight.com


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kingjamez
scholastic sledgehammer


Reged: 10/03/06
Posts: 996
Loc: Washington D.C.
Re: Quartz? any one working with it? new [Re: Undermidnight]
      #1348602 - 01/08/07 04:19 PM

Well, I now own 3 of these blanks. That should tell you what I think of them. They come with polished faces that saves you the trouble of grinding the back flat. I can grind/polish them without worrying about heating up the mirror causing astigmatism, or incorrect test results. I've also talked with the guy who made ctcables mirror and he considers it to be his favorite material to work with.
I start polishing on one of my blanks soon. I'll post as to my progress.

-Jim

--------------------
C8 on Atlas with EQMOD
ETX125 UHTC
Celestron Onyx 80mm
Meade Walmart 60mm guide scope
Canon Xsi Modified w/IDAS LPR
Gen 3 NightVision Eyepiece
Aspiring Optician
Watch my Wiimote control Atlas:
http://www.youtube.com/watch?v=PnmkygmGNiM


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Bill Cheng
super member


Reged: 05/21/05
Posts: 185
Re: Quartz? any one working with it? new [Re: kingjamez]
      #1348666 - 01/08/07 04:54 PM

Can you get 10" blanks?

--------------------
Bill


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ctcables
Vendor (Reco Labs)


Reged: 11/14/06
Posts: 151
Loc: Oregon
Re: Quartz? any one working with it? new [Re: Bill Cheng]
      #1349168 - 01/08/07 09:09 PM

If you want a blank just let me know, I have been selling them under ctcables on E-Bay, You can see I have a very good ratting. I am starting up a new account under recolabs so I can keep track of all sales better. My price is great for quartz and the blanks are worth it. My problem is it runs just about as much to cut a 14.5inch blank as it is for a 8 inch or 10 inch so the bigger the blank the better the deal. Best price on 6 inch is $85 and any thing from 6.1 inch to 10 inch is $125.00 then for every 1/2inch add $15 up to 14 inch. I am still working out the pricing for now but hope this helps out. Custom cut is about 2 weeks, if I have your size on hand it ships the next day. If anyone has questions about pricing please just send me a E-Mail to ctribe@hevanet.com If you have information on working with quartz please post it hear.

--------------------
Telescope
F4.5
14.6 inch Fused Quartz Mirror strehl .996
18 PT carbonfiber mirror cell
Antearies Quartz secondary
2 strut carbonfiber
Feather Touch focuser
Main scope is 31 lbs
Time to build off and on for a year.


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lloe
member


Reged: 10/12/07
Posts: 12
Re: Quartz? any one working with it? new [Re: ctcables]
      #1986246 - 11/15/07 12:06 AM

Has anyone finished a quartz mirror with a blank from ctcables yet? I am interested in this also, but still have to learn with smaller mirrors first as I don't think I have enough experience for a 14" yet.

Larry


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Tom L



Reged: 01/07/04
Posts: 31037
Loc: Sunny Oregon
Re: Quartz? any one working with it? new [Re: lloe]
      #2011520 - 11/27/07 12:19 AM

I'd like to know where I can get a finished quartz mirror in this thickness. Who sells finished mirrors?

--------------------
Tom
Tele Vue 102mm f/8.6 on an EzTouch
Vixen 80mm f/5 A80SSWT on a grab-n-go mount


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jack45
Post Laureate


Reged: 07/07/03
Posts: 3098
Loc: Lacey WA
Re: Quartz? any one working with it? new [Re: Tom L]
      #2011772 - 11/27/07 06:57 AM

This may help!

http://www.telescopelab.com/

Clear Skies!

--------------------
Discovery 16"f/4.5, XT12"Orion F/4.9 & Discovery 12.5"f/5.0


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mark cowan
Vendor (Veritas Optics)


Reged: 06/03/05
Posts: 3427
Loc: salem, OR
Re: Quartz? any one working with it? [Re: jack45]
      #2026671 - 12/04/07 12:49 AM

I sell finished quartz mirrors, but lately I've been working on a lot of robotics stuff. I have a number of fused silica mirrors in process between 13-14.7", all around .7-.8" thick. One may be close to what you're looking for...

http://obsopts.com

Best,
Mark


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ctcables
Vendor (Reco Labs)


Reged: 11/14/06
Posts: 151
Loc: Oregon
Re: Quartz? any one working with it? new [Re: mark cowan]
      #2089168 - 01/02/08 04:30 AM

I just wanted to update everyone that all my blanks are on sale for a short time. I need to raise some funds for Reco Labs so now would be the time to get one at a great price. Just PM me I have several posted on another auction site with photos. There are several blanks finished now with outstanding reports as exceptional finish. It seems that all the talk about .8 inches thick as being to thin is just not proving out that way. Howe ever it has proved out that it takes longer to work the quartz and above 12 inches special care in supporting the blank during polishing is needed. I have been working on cutting out some of the money used for cutting the blanks so I can keep the prices down so if this sale works out it will be good for everyone. I hope this helps and a big Thank You to all you who have worked with me. I am looking forward to being a supplier you can count on and one that stands behind every blank.

Thank You
Chris Tribe
Reco Labs
www.recolabs.com

--------------------
Telescope
F4.5
14.6 inch Fused Quartz Mirror strehl .996
18 PT carbonfiber mirror cell
Antearies Quartz secondary
2 strut carbonfiber
Feather Touch focuser
Main scope is 31 lbs
Time to build off and on for a year.


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