Re: [ATM] Figuring nightmare I need your help

[Ken Hunter <atm_ken_hunter@yahoo.com>]

10 step process...

1. Wash all the old polishing compound off the lap.
2. Lay a piece of cheesecloth or netting on the
face-up mirror.
3. Put enough polishing compound (no soap) on the
cheesecloth or netting so that all of it is wet.
4. Warm the lap so that it is easily dented with your
fingernail.
5. Place the lap on the wet cheesecloth or netting.
6. Put a weight on the lap.
7. Go eat dinner.
8. Take off weight, lap and cheesecloth.
9. Rinse off the excess polishing compound from the
lap and mirror with room temp water (filtered).
10. Polish some more and get back to us.

Ken Hunter




--- Brent Russell <brussel@bpc.org.za> wrote:

> 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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