Re: [ATM] 12.5 inches BVC mirror polishing and figuring difficulties

[George Anderson <tillerman1@videotron.ca>]

Salut RML

What part of near Montreal are you? South Shore, Laval, Boisbriand,
Hudson Dorion area? 

George Anderson
St Lazare

Clear skies and good health

RM L wrote:
> 
> Hello,
> 
> Please take a look at my BVC 12.5 in. F/4.8 mirror : http://www.axeinformatique.com/temp/Mirror/BVC_Mirror.html
> 
> and please advise me if I should :
> 
> 1- Sell the thing to a more experienced polisher, and buy a completed mirror (It's my first mirror).
> 2- Persevere and do what ? How much energy still needed ?
> (I don't want to make another lap tool or anything like that. If it's too much work...)
> 
> It's been a while... more than two years since I began working on my BVC 12.5 inches Mirror. Worked a little bit on it last summer. I was discouraged.
> 
> Initially, everything went pretty well, I think for a rookie like me.
> After a while of polishing (I was using polishing pads) some pads came loose from the tool and I rearranged the pads.
> It was a mistake because all areas were not well covered and  the uneven polishing made a central crater. (in just a few minutes)
> 
> Dumped the pads, I started polishing with my lap tool.
> Some of the crater went away after a long time (it's much less apparent). Some rolled edge appeared.
> 
> Anyways I'm stuck, and I don't know what to do. I'm discouraged,
> and I may sell the mirror and the tool to someone more experienced,
> and buy one that is ready made.
> 
> My polishing tool seems to work very slowly. Or maybe I don't use the right stroke, or oxide mixture. Sometimes the mirror "squeeks" while I stroke.
> 
> I recently recreated the grooves on the lap..
> Today I polished for about 1/2 hour and I saw no change in the figure.
> My lap could be too hard... I always warm my mirror and tool in hot water, the press them for 5-10 minutes, then start working.
> 
> Please have a look at my webpage http://www.axeinformatique.com/temp/Mirror/BVC_Mirror.html
> 
> And tell what I should do. How much would someone be willing to pay for my mirror and tool ?
> 
> Thanks all,
> 
> B.T.W. I'm near Montreal, anyone close that could help ?
> 
> RML
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