RE: ATM How to pre-polishing

["ANeves" <aneves@novared.cl>]

Hi John,

Maybe I am using too much grit. I amplied a generous coat to the mirror and
then placed the tool
with the pads on the mirror. The pads looked dark gray witht the absorved
grit. My pads are also from Salem,
so the only thing that varies from my process to yours is the grit size (25
micros versus 9) and the amount of grit applied.

Alfredo


-----Mensaje original-----
De: owner-atm@shore.net [mailto:owner-atm@shore.net]En nombre de John D.
Upton
Enviado el: Wednesday, June 26, 2002 11:14 AM
Para: ANeves
CC: ATM List
Asunto: RE: ATM How to pre-polishing



Alfredo,

At 10:19 AM 6/26/2002 -0400, you wrote:
>Would a finer grit, say 5micros, give me any polish? I am applying the pads
>to a tile tool, made of glass type tiles fixed to the dental plaster with
>epoxy. I've been afraid of heating the tool in case it weakens the epoxy.
Is
>there any advantage of prepolishing with grit to get a faster polish?

     I have used 9 micron grit on pads with great success.  Two other local
ATMs have also used the technique successfully, one with 9 micron, and the
other with 5 micron.  In each case, the abrasive was applied from a thin
liquid suspension.  The pads were from Salem Distributing.  Also in each
case, the pads were applied directly to the same tool used for the final
stage of fine grinding.  Polishing was done with slow, heavy strokes, just
as is recommended with pitch polishing.  We found polishing times were
reduced considerably.  Normal polishing with CeO on pitch followed after
the surface had cleared to the naked eye.

http://www.atm-workshop.com/grinding.html

Sincerely,

John D. Upton
Georgetown, TX
<http://www.atm-workshop.com/>      "The ATM's Workshop Page"
<http://members.aol.com/RonWin20/>  "Ronchi For Windows Software Page"