RE: [CAD_CAM_EDM_DRO] Creating long straight edges (and big squares)

Hi Marcus -

Just curious about your .0025" of wear - can you actually measure
the effect of this on your parts? I had an old Southbend with a
good .020" wear on the busy part of the front vee, and it really
only bothered me on small diameter cuts. I would guess that the
horizontal component of this kind of wear decreases as the cut
diameter increases, as long as it's just vertical wear from the
carriage going back and forth. What's your case?

Regards,

Carlos Guillermo
VERVE Engineering & Design

-----Original Message-----
From: Marcus & Eva [mailto:implmex@...]
Sent: Saturday, July 06, 2002 9:16 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Creating long straight edges (and
big squares)

Hi Jon:
You have my undying admiration for your willingness to dive
into such a
BIG job.
I was thinking of trying to stone my machine as well (my ways are
worn
0.0025").
I gave it a 15 minute workout and couldn't measure the difference.
That's when I got on the net and found a way grinder in Ontario
who has
EXCELLENT references, and wants only $850.00 CDN for the job.
He's an older German gentleman who claims not to really NEED to do
much in
the way of work anymore, so he just does the jobs he likes.
He has 2 big Churchill way grinders, and his customers tell me he
gets them
dead nuts...within tenths over 10 feet!!!
I'm sending my Monarch 10EE over in a couple of weeks or so.
I'll let everyone know how it works out.
Cheers

Marcus

----- Original Message -----
From: "Jon Elson" <elson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, July 06, 2002 8:33 AM
Subject: Re: [CAD_CAM_EDM_DRO] Creating long straight edges (and
big
squares)


> Les Watts wrote:
>
> > Well thanks Marcus.
> >
> > A machine builder friend showed me how to "scrape" flame
hardened v ways
> > using
> > mounted stones in a high speed pencil air grinder. I did it on
one
machine
> > with great results
> > but it is slow. About the only way I can justify it is by
waiting till
after
> > hours or the weekend
> > and saying "ok-I'm not working now, i'm just playing".
>
> > ----- Original Message -----
> > From: "Marcus & Eva" <implmex@...>
> > Sent: Friday, July 05, 2002 10:14 PM
> >
> > > Too bad I can't think of a good way to use it on the vee
ways of my
> > lathe!!
> > > Looks like I'll have to send the machine off to the way
grinders after
> > all.
>
> Yes, it is slow. I first used a toolpost grinder mounted to the
base of
the
> tailstock and slid it down the ways. This, of course,
duplicated the
flaws
> in the tailstock ways, which were in a LOT better shape than the
main
> ways. I then tried all sorts of things with a die grinder,
mostly Cratex
> points, and then larger Cratex wheels. These didn't work very
well, but
> I may do some finish work with these later. But, for final
adjustment
> in the .001" range, I'm using bench stones! You oil the stone
very
> thoroughly and just rub the stone back and forth on the ways. I
take
> about 100 back and forth movements of 6 - 10" over all the high
spots,
> then clean it and check it with a straightedge. Every hour or
so I
> make a pass with a Vee master block that I made and a master
precision
> level. I also use the Vee block with a dial indicator on a
magnetic base
> to read against the reference surface.
>
> I'm getting there, and it is going to be a very straight bed
when I'm
done.
> But, it IS slow. This is a big lathe, a 15" Sheldon. See
> http://pico-systems.com/sheldon.html for a progress report
with
pictures.
>
> Jon
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
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> http://groups.yahoo.com/group/jobshophomeshop I consider this
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>
>
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Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to
reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this as
a sister site to the CCED group, as many of the same members are
there, for OT subjects, that are not allowed on the CCED list.



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