[ATM] Figuring nightmare I need your help

["Brent Russell" <brussel@bpc.org.za>]

Hi folks,
I received no replies to my last message posted to the list. So I try
again
I am trying to figure a 12.5" plate glass mirror. Figure is mooth and
edge is good. I am using a 10" a 6" and a 3" tool.
The mirror is about 2.5 to 3 waves over corrected and I cannot no matter
how hard I try get the edge zones to flatten out. I am desperate here. I
am nearly at the point of re fine grinding. No matter what I do the edge
zones will just not respond to anything I do
I have tried 25 times round with the 3" on the high spot no change I
have tried chordal strokes with 6" tool just inside the high spot no
change I have tried 20 minutes with the 10" tool using a chordal stroke
with about 1.5" overhang - no change to the edge zone
HELP PLEASE :-0
Do I make a full sized lap
Do I re fine grind
Do I try different strokes

Regards,
Brent

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