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Aluminium mirror cell

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#1 Meep_Esq

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Posted 28 January 2013 - 11:38 PM

For the last year I've been puttering my way through making a 200mm f/13 newt. Well, I've reached a milestone of sorts, in that I've practically finished the main mirror cell, and I thought I'd share.

Because it's a full thickness mirror, I decided that the cell should be light-weight and let air to circulate freely behind/over the primary, so I eventually settled on a hollow sandwich construction which I hope will allow this to occur.



A full sequence of how is was made is in my gallery

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#2 davidpitre

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Posted 29 January 2013 - 02:19 PM

Congratulations. That is a lot of glass and should be a lot of telescope. Will you be resting it on 3 points? How about edge support? Will it be alt/az mounted?

#3 Meep_Esq

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Posted 29 January 2013 - 11:04 PM

Congratulations. That is a lot of glass and should be a lot of telescope. Will you be resting it on 3 points? How about edge support? Will it be alt/az mounted?


Hi there David - yes, it is a lot of telescope *lol* Long story short, I was planning selling up my small house with no garden, to somewhere with a better view of the skies, and decided to start building the telescope that I wanted to use. However, recession, redundancy and everything else happened, so now it looks like I'm staying put, studying as a "mature student", building a giant telescope!

The cell will have 3-point support and I've just cut out the edge supports, so tomorrow I'll look to attaching them. Next I have to make the push-pull bolts and then attach the cell to the backplate.

As for mounting the entire beastie - yes, it will be an alt-az. I've followed an interesting thread on here where a chappie made a 10". I'm still mulling around ideas at the moment, but then that's half the fun of making a scope :-)

#4 Meep_Esq

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Posted 03 February 2013 - 10:12 PM

And finally finished!

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#5 Meep_Esq

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Posted 03 February 2013 - 10:13 PM

With mirror. Righto - back to polishing out those teeny pits :-)

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#6 sopticals

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Posted 04 February 2013 - 02:09 AM

Hi Vaughn, :bow:

Nice piece of :jump: glass. All the best with the project.

Regards
Stephen.(44deg.S.)

#7 starman345

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Posted 04 February 2013 - 06:23 AM

Nice work on the cell Vaughn, good luck with your glass project

#8 Meep_Esq

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Posted 04 February 2013 - 07:19 PM

Thanks everyone - when I make some decent progress I'll put up a thread about the foolhardiness of building such a long unwieldy telescope >:-)






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