Re: [ATM] Re:Building a Mirror Cell

["Jan van Gastel" <jhm.vangastel@wanadoo.nl>]

Ulhas,

I have a 6-points cell with the three balancing bars inside of three larger
bars forming a triangle. The balance bars are 15 mm diameter aluminium
tubing and the bars in which they balance are 20 mm diameter. If you are
interested, I can send you a CAD drawing.

Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/

----- Original Message ----- 
From: "Ulhas Deshpande" <ulhas_ngp@sancharnet.in>
To: <atm_free@yahoogroups.com>; "ATM" <atm@atmlist.net>
Sent: Sunday, January 09, 2005 12:40 PM
Subject: [ATM] Re:Building a Mirror Cell


> Mark,Jan,Tom and Richard
> Thanks for your advice and inputs on pivot points.
> I found a simple support arrangement on  Arjan te Marvelde's web page . It
> uses two aluminium  channels to form a pivot arrangement for bars. I think
I
> will use this .
> Mark , I recalculated the cell with PLOP. For six points it gives P-V 1.9
> e -06 mm and RMS 2.96 e -07 mm. even after I remove all the digits after
the
> decimal and use just 67mm for the radius of support points. I guess that
> should suffice and is achievable.
> Thanks again. You are all great guys.
> Cheers
> Ulhas
>
>
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