Re: [ATM] industrial polishing pads?

[Dale Eason <atmpob@yahoo.com>]

See this ATM example
http://www.atm-workshop.com/grinding.html
Dale Eason

--- David Weinshenker <daze39@earthlink.net> wrote:

> Out of curiosity, I obtained from an industrial
> supply place
> some "polishing pads for glass surfaces" which
> consist of a
> thin slice of resilient plastic foam (about 1mm
> thick), adhesive
> backed and allegedly (the stuff -is- sort of a pale
> beige-pink
> color) impregnated with cerium oxide.
> 
> I think these are the sort of "industrial fast
> polishing pads" that
> all of the standard "telescope making" texts say are
> not quite suitable
> for producing a final polish on the optics of an
> astronomical device,
> but I am interested in trying whether or not they
> may have some virtue
> as a "prepolishing" material to smooth the texture
> left by the fine
> abrasive before continuing with a pressed pitch lap
> to refine the
> surface to true smoothness.
> 
> What I am wondering is how these pads are normally
> used (in their usual
> industrial context) - high speed? low speed? wet?
> dry? etc. - is anyone
> familiar with the standard factory practice with
> this material? (There
> were no instructions supplied with the stuff.)
> 
> In the absence of other data, I may try simply
> hand-polishing a ground
> piece with a disk of the pad material adhered to the
> surface of the mating
> "tool" and see what happens.
> 
> -dave w
> 
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> 



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