RE: [CAD_CAM_EDM_DRO] Re: re:RE: Epoxy Granite

Graham,

I plan to do some significant experimenting with various methods to grind down
to 5 or 10um and then switch to SPDT or lapping wheel. I have a bunch of
borosilicate blanks of various sizes up to 24 inch and some thick plate glass at
40 inches to torture.

As for what I'll take off in each pass... that has yet to be determined and I
have the ability to totally automate the process so I can sleep while it works.
Thought I doubt I get much sleep when I mount up a 4 inch thick 2 meter blank.

If you're interested in polymer concrete see patent 5,765,818 at
http://www.uspto.gov/ see page 11 of the images but first you'll have to
download http://www.internetiff.com/ . I plan to sandwich two 100 inch square
1/2 inch Invar 36 plates separated by 6 inches of (Got the Invar 36 on the
family plan).

Right now I'm having trouble finding someone that will sell me the resin,
everyone wants to make the mold and cast it for me. I understand there reasons
but it sort of takes the fun of the whole thing.

Jack Hudler

-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com [mailto:CAD_CAM_EDM_DRO@yahoogroups.com]
On Behalf Of Graham Stabler
Sent: Tuesday, February 28, 2006 5:48 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: re:RE: Epoxy Granite

Out of interest and (morbid? ;) ) curiosity how much material will you
be able to take off per pass? Or to put it another way how many
passes do you see yourself doing?

Would it be possible to rough with a grinding tool (something along
the lines of a diamond burr in a high speed spindle) and then turn for
the final(ish) finish?

Sounds crazy, I like it.

I'll also be interested to here about the polymer concrete base, very
interesting!

Graham