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Re: [ATM] ritchey cretians
Thanks for all the support on the stand!
Now a few questions on testing! any one have any good sources??
Thanks!
Mikhail
On 1/19/08, George Anderson <tillerman1@videotron.ca> wrote:
>
> HI Khail
>
> My suggestion would be for you to do as one of my friends has done.
> His stand can be tilted and was built (on wheels) to be the same height
> as his machine. When he is ready to test he removes any retainers from
> the machine and slides the mirror onto the test stand. The edge supports
> are then locked in place along with retainer on the top just in case.
> The stand is then wheeled over to his test station where the surface is
> then rotated from horizontal to vertical for testing.
>
> George Anderson
> Montreal Canada
>
> Clear skies and good health
>
> Khail Rosenberg wrote:
> > Hi Bob,
> >
> > I have an ambition to never use machines to make my mirrors, but i think
> > something for this size, i really will have no choice... I think i will
> make
> > a few machines, will help if i want to make something bigger and
> better..
> >
> > And i have read about the diamond pads, you are right, even though grit
> can
> > be relatively cheap, with such a large mirror i feel i will spend more
> on
> > grit than the actual glass itself..
> >
> > Any advice on machines to actually lift and put it on stands? I do
> > understand the concern of dropping the mirror, it will make a lot, a
> looooot
> > of work really out the window...
> >
> > Any advice on griding or polishing, and then testing both primary and
> > secondary will be greatly appreciated.
> >
> > I believe my course of action will be as follows:
> >
> > 1. Make the 48" glass x 4"
> > 2. make the machines to grind the bad boy... any suggestions on HP for
> the
> > motor? 20, should be ok?
> > 3. get three flats made for testing all 48" x .75", i chose this because
> it
> > can be made for a pretty darn good price, any comments on the thickness
> > being too thin?? .75 is ok?
> > 4. ASK ATMLIST.NET where to go from there.. after I already have a
> ground
> > out mirror and one thats already polished to a sphear.. where to go from
> > there??
> >
> > ..... any good step by step plans on the entire process I will be happy
> to
> > donate many goodies to a convention, person, school etc...
> >
> > Thanks,
> > Mikhail
> >
> >
>
>
>
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