Re: ATM Next steps in mirror-grinding

["Bob May" <bobmay@nethere.com>]

Now that you have a hole dug, you make the tile tool and continue grinding
for whatever you really want.  I do suggest that you get the tool in full
contact first and then see what you have with a ROC.  If you haven't gotten
the edge fully grinding then the short W will probably get you over what you
want about the time that you get the full mirror grinding.  If that happens,
flip the mirror and tool and open the radius a bit  Remember that whatever's
on top will tend to turn concave.  Longer strokes make the change happen
faster than short stokes.  I might also note that the polishing/figuring
will probably shorten the ROC by about 1/2" with about half of that in the
figuring step.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net