RE: [CAD_CAM_EDM_DRO] Re: - grinding.

Rob,
Inlaws with Mattison grinders sounds like a plan!

For tubing do affix pads to be ground as mating surfaces
for rails. Directly grinding one side of a steel tube will cause
some warping. Also as has been mentioned they are not flat.

I have another procedure for mounting ground pads for ways that I use
on tubing. The scrape grinding method is used on solids only. The pre-ground
pads
are chocked in with epoxy using a special method. It results in sub
thousandth
flatness if done carefully. Kind of like super precision bricklaying.
I need to write that up and put it in the site
with the scraping stuff. You can see some of these pads in the machine
pictures
on thr y axis.

I am trying to remember the straightness spec for astm tubing... I think
it is 1/8" IN 5 feet...something like that. Hence the need for pads.

Les

Leslie M.Watts
L M Watts Furniture
Tiger Georgia

Main page:
http://www.lmwatts.com
Engineering:
http://www.lmwatts.com/shop.html
Cnc surplus for sale:
http://www.lmwatts.com/forsale.html
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http://www.lmwatts.com/signwp.html

-----Original Message-----
From: Robert Lyman [mailto:robsheplyman@...]
Sent: Tuesday, October 26, 2004 2:07 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re: - grinding.



I am looking for travels of 5' x 3' on my machine.
I'm sure with some time and well thought out elbow
grease it could be done by hand.

I have in-laws with a large Madison grinder, so I'm
going to cheat on this one and have them grind it.

Rob.

>
> I had thought about this some time ago.
>
> If you read the proceedure that Les Watts put in the
> files section
> you can see how one an grind the surface really flat
> with a hand
> grinder.
>
> My idea was to include a fixture and using the
> linear rails for the
> project on this fixture, one can make a gantry and
> measure sufrace
> and mark out the places that need grinding. it
> seems that would make
> measuring much faster.
>
> I toyed with the idea of a tool post grinder to do
> the work, but at
> the excruitatingly slow removal rates it would take
> weeks to get the
> work done.
>
> Maybe a final pass ?
>
> Dave
>
>
>
>

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