RE: [CAD_CAM_EDM_DRO] Re: Cutting an arc help G2/G3?

George,

You are very welcome.

The new version of the G-code in located in the files section, george_2.fgc.
This is set up to use a 3/4" endmill, and will produce the part you are
wanting to cut. I suggest a raw material size of 2.25 x 3.25 x .5 inches to
get the finished part in the correct size without having to worry about
cutting air or being off a couple of thousands in part setup. Good luck,
let me know how it turns out.

I am glad to be able to help people when I have the time and knowledge.
This was really simple, I drew it up, saved it as a .dxf file and imported
it into the demo version of FlashCUT 2.0 to generate the g-code. Many
people on this and other lists have helped me, I try to return the favor by
helping others when I can.

John Guenther
'Ye Olde Pen Maker'
Sterling, Virginia

> -----Original Message-----
> From: gglines1 [mailto:gglines@...]
> Sent: Wednesday, June 25, 2003 17:45
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Cutting an arc help G2/G3?
>
>
> John,
>
> You've nothing to apologize for, you've been fantastically helpful!
>
> Thank you!
>
> George
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "John D. Guenther"
> <j.guenther@v...> wrote:
> > George,
> >
> > Sorry for not responding to this sooner. The radius of a 12" circle
> > is 6", the radius of an 11" circle is 5.5", so the difference would
> > give you a part 1/2" wide. Using a radius of 5" for the inner arc
> > will give you a part 1" wide.
> >
> > I just saw your message about using a 3/4" endmill, I will redo the
> > g-code this evening and post it in place of what I put up last
> night.
> > I am at work now and don't have all the proper software tools on my
> > laptop to get it done for you here. Sorry for the delay, I should
> > have read my email when I got up this morning.
> >
> > John Guenther
> > Sterling, Virginia
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "gglines1" <gglines@c...>
> > wrote:
> > > If the outer edge of the ring is 12" and the part is 1" wide,
> > > wouldn't the inner edge of the ring be an 11" circle?
> > >
> > > George
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "John Guenther"
> > > <j.guenther@v...> wrote:
> > > > George,
> > > >
> > > > By the way, if "2.5" long piece cut out of a 12" ring that is
> 1"
> > > wide" is
> > > > true, then you are talking about a 12" circle and a 10" circle
> if
> > > the part
> > > > really is 1" wide.
> > > >
> > > > John Guenther
> > > > 'Ye Olde Pen Maker'
> > > > Sterling, Virginia
> > > >
> > > > > -----Original Message-----
> > > > > From: gglines1 [mailto:gglines@c...]
> > > > > Sent: Tuesday, June 24, 2003 14:55 PM
> > > > > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > > > > Subject: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3?
> > > > >
> > > > >
> > > > > I have to cut a small workpiece with a curve. The workpiece
> > > will be
> > > > > 2.5 inches long, 1" wide and 1/2" thick. The long end of the
> > > > > rectangle needs to be cut in an arc to match a 12" circle, the
> > > > > shorter inside arc to match an 11" circle. Hard to describe,
> > > think
> > > > > of a 2.5" long piece cut out of a 12" ring that is 1" wide.
> > > > >
> > > > > Assuming I start with a workpiece that is a rectange 2.5"
> long
> > > by 1"
> > > > > wide, how would I program the arc cut? I can see programming
> a
> > > > > circle and letting the machine make a 12" revolution, but
> that
> > > would
> > > > > be really slow. I'm not sure how to program just the part of
> > > the arc
> > > > > that I need.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > George
> > > > >
> > > > >
> > > > >
> > > > > (FYI: My controller software (Microkinetics Millmaster Pro)
> > > > > recognizes I and J parameters but not the R parameter with
> > G2/G3)
> > > > >
> > > > >
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>
> Addresses:
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>
> 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
> to be 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.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
> EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>