Re: ATM Grinding Tool

[schmidt@coyote.csusm.edu (Michael Schmidt)]

At 6:36 PM 9/15/96, Daniel Walker wrote:
>I have two 8" pyrex from Willmann Bell, both are fine blanks and I am
>wanting to use both of them for mirrors.  My question is, is it ok to
>use a tile tool for rough grinding (from the start).  I don't want to
>use my other blank for this.  I have been watching and have seen a lot
>of post concerning a tile tool for after rough grinding.  Also how do I
>set this up.  Since there want be a curve for the tile tool to conform
>to.

You can use a iron ring or something to hog out the mirror to the
approximate sagitta and cast your plaster/tile tool to the curve. The best
information for this technique is on the web in the ATM archives:
http://www.system.missouri.edu/ics/staff/andy/ATM/ARCHIVES/JUN95/0123.html.


I used a 1" black iron pipe t for my 6". Worked fine.