Re: [CAD_CAM_EDM_DRO] Re: Interface. Gauging interest.

----- Original Message -----
From: lcdpublishing <lcdpublishing@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, May 17, 2006 9:21 AM
Subject: [CAD_CAM_EDM_DRO] Re: Interface. Gauging interest.


> Uh oh, Phil you are treading in very DEEP waters :-)
>
> If you don't think tool radius compensation is needed (especially on
> a mill), you apparently never ran a machine which make precision
> parts. TRC and TNRC are both very useful functions in precision
> machining regardless of CAM side programming, Conversational, or
> straight G-Code programming.
>
> Even canned cycles for drilling are still very functional and
> useful. Many steels for instance, such as the 10 series, can
> exhibit varying degrees of machinability. With a canned cycle for
> peck drilling, it only takes a couple seconds to adjust for the
> problems with stingy chips. If you have to go back to the CAM
> software to make the changes in all the individual moves, it would
> certainly take much more time. Make changes, re-post program,
> transfer to DNC system, download program versus, change one address
> in the program and run the next part.
>
> Fixture offsets are a wonderful feature, even with CAM systems.
> Remember, CNC controls do not have an infinite amount of memory.
> So, without using fixture offsets and sub-programs, many programs
> would simply be too big to fit in the control's memory. Many of the
> PC based controls have fairly large memories, but it is still not
> infinite.
>
> Chris
>
>
>
>
>
> -- In CAD_CAM_EDM_DRO@yahoogroups.com, "Phil Mattison"
> <mattison20@...> wrote:
> >
> > Hi Chris,
> >
> > I think I said I didn't expect it change any time soon. I said the
> RS274NGC
> > spec is a piece of crap. It is obviously from a time when most CNC
> code was
> > written by hand, like the days when my dad wrote financial
> programs in
> > assembly language. It is full of constructs supporting things that
> are
> > largely irrelevant now, like alternate coordinate systems for array
> > machining, automatic tool radius compensation, etc. G-Code as a
> convention
> > (i.e. G0 G1, etc.) is as good as any equivalent, but the
> collection of
> > capabilities is mostly obsolete because most of what was created
> to simplify
> > manual G-Code writing is no longer necessary with all the
> automatic code
> > generators already available. Whoever produces the desired results
> in the
> > cheapest, easiest manner will ultimately win, tradition
> notwithstanding.
> > --
> > Phil Mattison
> > http://www.ohmikron.com/
> >
> > ----- Original Message -----
> > From: lcdpublishing <lcdpublishing@...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Wednesday, May 17, 2006 5:31 AM
> > Subject: [CAD_CAM_EDM_DRO] Re: Interface. Gauging interest.
> >
> >
> > > Hi Phil,
> > >
> > > Not sure what you are basing this opinion on, but, don't expect
> RS274
> > > (or simply put, G-Code programming) to go away. The most complex
> > > shapes that are machined today are done with G-codes on ordinary
> CNC
> > > machines all over the world.
> > >
> > > The G-Code method of programming has been around since the
> beginning
> > > of CNC, and will remain there, probably forever. There really
> isn't
> > > anything lacking with it, nor is there anything that can't be
> machined
> > > with it.
> > >
> > > There have been a number of attempts over the years to "change
> the
> > > world", most have failed, some have done okay. For example, at
> one
> > > point in time, it was thought that programming on the shop floor
> was
> > > the best way to get things done. During that phase, control
> mfgs. came
> > > out with various "Conversational" controls which were somewhat
> of a
> > > CAM system on top of the basic G-Code interpreting control.
> > >
> > > While this method of programming is still around and still
> applicable
> > > in short-run shops, production shops frown on it as being very
> > > inefficient. I mean really, you have a $150,000.00+ machine tool
> > > being used as a $5,000.00 CAM system.
> > >
> > > As to the various flavors of G-Code programming, there have been
> many
> > > attempts to change and it seems as though every control mfg puts
> their
> > > own little spin on it. But it's still the basic G-Code and
> cartesian
> > > coordinate system that gets the work done on machine tools.
> > >
> > > So, while you may think it is "Crap", the leaders in the machine
> tool
> > > industry put their money on G-Code programming as THE method of
> > > programming CNC machines.
> > >
> > > Don't expect it to change anytime soon.
> > >
> > > Chris
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > > After a careful reading of the various flavors of RS274 it
> looks to
> > > me like
> > > > RS274NGC is pretty much an outdated piece of crap when it
> comes to
> > > machine
> > > > control, surviving only by virtue of familiarity and inertia.
> Not
> > > that I
> > > > think it is going away any time soon, but it certainly doesn't
> look
> > > like
> > > > golden handcuffs if you're interested in the general motion-
> control
> > > market.
> > > > I suspect it may not really have much of a strangle-hold on the
> > > hobby CNC
> > > > market either, since that will have many new-comers if it is
> in fact
> > > growing
> > > > rapidly.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Addresses:
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> Addresses:
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> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
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[Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> 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
>
>
> Yahoo! Groups Links
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