CAD CAM EDM DRO - Yahoo Group Archive

Re: Cutting an arc help G2/G3?

Posted by gglines1
on 2003-06-24 22:44:20 UTC
Alan,

Thanks. I'm programming directly in G codes. I have Dolphin
CAD/CAM but don't have a post-processor yet that will work with my
mill controller.

George

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett KM6VV
<KM6VV@a...> wrote:
> Hi George,
>
> You haven't mentioned if you're using CAD or not. For CAD (could
work
> it out on a piece of graph paper), draw two 12" arcs from each end
> corner of the 2.5" stock. These two arcs will intersect WAY off
the
> part. Then from the intersection point, draw a 12" arc. You
should see
> this arc intersect your two corner points.
>
> Repeat this for the 11" arc on the other end of the stock. You
now have
> two arcs, two sides, and the locations of the arc centers. From
this you
> have the needed information to either program by hand (ouch!), or
CAM.
> You'll have to draw the tool path AROUND this part outline, of
course
> (unless you have G41/G42 tool comp). A little harder with out
CAD/CAM.
>
> HTH
>
> Alan KM6VV
> P.S. You wouldn't be making a FLYWHEEL by segments, would you? I
may
> be able to draw and/or create a toolpath for you (If Fred doesn't
beat
> me to it! ;>) )
>
> P.P.S. Doing it on a Sherline? Visit SherlineCNC
>
> gglines1 wrote:
> >
> > 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

Discussion Thread

gglines1 2003-06-24 11:55:06 UTC Cutting an arc help G2/G3? Alan Marconett KM6VV 2003-06-24 12:13:26 UTC Re: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3? John Guenther 2003-06-24 13:23:49 UTC RE: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3? John Guenther 2003-06-24 13:26:31 UTC RE: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3? John Guenther 2003-06-24 17:05:25 UTC RE: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3? John Guenther 2003-06-24 17:07:56 UTC RE: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3? James Cullins 2003-06-24 17:08:43 UTC Re: [CAD_CAM_EDM_DRO] Cutting an arc help G2/G3? gglines1 2003-06-24 22:39:34 UTC Re: Cutting an arc help G2/G3? gglines1 2003-06-24 22:41:23 UTC Re: Cutting an arc help G2/G3? gglines1 2003-06-24 22:44:20 UTC Re: Cutting an arc help G2/G3? gglines1 2003-06-24 22:44:57 UTC Re: Cutting an arc help G2/G3? John D. Guenther 2003-06-25 09:34:59 UTC Re: Cutting an arc help G2/G3? James Cullins 2003-06-25 10:01:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Cutting an arc help G2/G3? Charles Knight 2003-06-25 13:07:45 UTC Re: [CAD_CAM_EDM_DRO] Re: Cutting an arc help G2/G3? gglines1 2003-06-25 14:45:57 UTC Re: Cutting an arc help G2/G3? John Guenther 2003-06-25 16:35:05 UTC RE: [CAD_CAM_EDM_DRO] Re: Cutting an arc help G2/G3?