Re: Flashcut vs desknc for windows & Deskam

Hi Art, I'm glad I caught you before you headed off on vacation,
(see, I really did go to your web sight) hope you havn't logged off
for tonight allready. Your reply does help me to understand the "
widows problem" and your solution but, the signal generator obviosly
would give you the puses needed. Are their other benefits to your
system that I wouldn't get with the others? Would your system work
with a signal generator? Thanks & enjoy your vacation.
Dale

--- In CAD_CAM_EDM_DRO@y..., "Art Fenerty" <fenerty@h...> wrote:
> Hi All:
>
> I thought I'd jump in and explain the "Don't use Windows"
paradigm
> as I have seen referances to it quite frequently.
> It was, for a long time, considered wrong to use Windows for
pulseing a
> stepper motor. This is because in general applications programming,
it is
> virtually impossible to pulse a stepper reliably under Windows.The
fastest
> Windows can reliably run a timer is 1000hz and even that is
questionable. As
> a result of discussions on this group about 2 years ago, I
endevoured to
> produce a windows Ring0 (System)driver to pulse faster and more
reliably.
> The driver works quite well with a couple of caveats. It does not
work on
> some older motherboards, and it runs at a maximum speed of 8192Hz.
It was
> generally thought that although one could pulse at 8Khz, you could
not
> subdivide the frequency from 1Hz to 8192Hz with one hertz steps.
The Master5
> driver does it quite well.
> It is not a good solution for those who need speeds up to
100,000 Hz,
> but most home machines now seem to be in the range of 1000 - 4000
Pulses per
> inch so a speed of 8IPS to 2IPS is obtained with a 8Khz driver.
This is not
> only adequate for some, but faster than required for many.
> This method does have its problems, but users usually find the
problems
> are outweighed by the advantages. It is not a Windows program in
the usual
> sense as it attempts to turn Winows into a psuedo Real-Time
environment, and
> people soon find it has its own quirks (Just like the DOS
programs). In the
> end it offers a trade-off between the tight control of DOS with its
limited
> and clunky user controls with up to 80,000PPS, and the less tightly
> controlled environment of Windows with its rich features and much
better
> user interface with a top speed of 8000PPS. I don't want to make
this an
> Ad, (some like coffeee, some like tea) I just wanted to answer
the "dated"
> expression in some manuals that you should beware of Windows in CNC
> control's. It can be done. I suspect in future it will be done
more often.
> Faster machines lead to more possibilities.
>
> Thanks,
> Art
> Master5 Software
> http://users.andara.com/~fenerty/master.htm
>
> ----- Original Message -----
> From: "aspaguy" <spaguy@l...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Sunday, January 13, 2002 6:38 PM
> Subject: [CAD_CAM_EDM_DRO] Re: Flashcut vs desknc for windows &
Deskam
>
>
>
> --
-
> > Group: Thanks for the insightfull replies to my post. paricularly
> > Chris, Dan & Ballendo. Like so many things in life answers just
> > create more questions.I did resend the e-mail to flashcut and got
a
> > quick response. unfortunately, as a newby the benefits they
described
> > were over my head and I'm not sure that weather deskwin nc has the
> > same benefits or not. I will e-mail deskam and ask them about
these.
> > It seems that no one here on the group has dealt with both progams
> > much, but fortunately Dan and Chris have each used 1 of the
programs
> > and found them favorable. this information also creates more
> > questions, like what is Continuous contouring? it sounds like its
> > important for my type of application.And what about tool radius
> > compensation. I would assume this has to do with cutting a square
> > hole with a round bit and getting corners that are radiused the
same
> > as the bit radius, but i don't see how software can fix that.
> > As far as why Master 5 wasn't being considered, well that has more
> > to do with how i got to this point than with good sense. To make
a
> > long story short, I was under the impression that using the
windows
> > clock to run the program created very undesireable problems. I
would
> > appreciate more feedback on this and if master 5 has really been
> > able to adequately solve it without a signal generator. I
previously
> > had stumbled on to the master 5 sight, but dismissed it becaus of
no
> > signal gen. At Ballendo's suggestion I went to the data base to
check
> > out Master 5 and discovered It was authored by a guy named Art,
the
> > same Art who seemed Quite insightful in answering many of the
> > questions I have seen on this group. This tells me that this is
> > definitly worth looking at along with the other 2 Also, I have
seen
> > a few programs with nesting features for better materials usage,
but
> > most of them have been expensive. does anyone know if this is
> > available in any of these low cost programs? Would this be
considered
> > a cad or a cam funtion? Speaking of cam, Chris, the funtion of
> > Creating G code from Dxf is handled in Deskam, then Desknc uses
the
> > g to run the drivers.
> > By the way, has anyone considered adding a cnc glossary to the
> > database? A complete and growing glossary would save a lot of time
> > for us newbies (there seems to be a lot of us) and keep you
vetrans
> > from answering the same questions over & over it should contain
what
> > seems obvious such as drivers, steppers, servos, as well as
> > acronyms.... dxf, g, cad, cam, etc as well as deeper terms like
> > continuos contouring and tool radius compensation. Shoot, if
enough
> > of these database features are added, perhaps instead of a book we
> > can just rename the group " cnc for dummies" ( if that isn't to
> > insulting for our exhalted vetrans. lol) I guess I'd better end
this
> > novel and give someone a chance to reply
> > Thanks,
> > Dale
> >
> > In CAD_CAM_EDM_DRO@y..., Chris L <datac@l...> wrote:
> > > There would be an interesting thing to try to find out. Just who
> > was doing
> > > it. I really do not recall of any real PC styled windows G-Code
> > control. I do
> > > recall some motion control stuff and certainly data-acc stuff.
> > >
> > > It was all big money.. That I remember well !
> > >
> > > Chris L
> > >
> > > ballendo wrote:
> > >
> > > > Chris,
> > > >
> > > > Lotta good stuff in this post. I've snipped one small part
tho'
> > > >
> > > > LOTS of people/companies were doing contouring in Windows
before
> > > > FLashcut! Those just weren't AIMED at the low cost user... or
> > large
> > > > markets.
> > > >
> > > > Sometimes there is a tendency to forget that a world often
exists
> > > > beyond our current boundaries... And might have existed for
some
> > time.
> > > >
> > > > Have to say that the rest of your post is pretty spot on, IMO.
> > > >
> > > > Hope this helps
> > > >
> > > > Ballendo
> > > >
> > > > P.S. Is there a reason Master5 isn't being considered in this
> > group?
> > > > EXCELLENT contouring, NO black box. Extensive(nist EMC) gcodes
> > (and
> > > > other import filetypes). LOW price. Down side? Currently slow
> > pulse
> > > > output, but soon to change with Master6 release.
> > > >
> > > > --- In CAD_CAM_EDM_DRO@y..., Chris L <datac@l...> wrote:
> > > > <snip>
> > > > > There is also some satisfaction in recognizing that this is
the
> > > > company who actually "DID" make a PC based Windows control
With
> > > > Continuous Contouring when all the Nay-sayers said "It can
not be
> > > > done" and that DOS was the ONLY way ! They obviously were a
> > > > bit "advanced" back then. <snip>
> > > >
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