Larry,
Thanks for the update & link - I will be sure to have a look at it and see
what sort of constructive comments would be suitable.
Kind regards
Nick
> Nick, Charles and List,
>
> Intel has announced the formulation of the 3D Industry Forum (3DIF). The
> purpose of the organization is to recruit members of the 3D industry for the
> discovery, definition, development and deployment of a common file format
> for sharing and viewing of CAD data via the Internet, Web and other media.
> Check out: http://www.3dif.org/index.php
>
> If the needs/wants/hopes for RP data structure and content were identified
> and posted, perhaps they would be considered in this attempt at a standard.
> If RP industry experts don't participate in attempts shch as this, we may
> never move beyond this point.
>
> Larry Blasch
>
> -----Original Message-----
> From: Charles Overy [mailto:charles@lgmmodel.com]
> Sent: Wednesday, April 21, 2004 2:03 PM
> To: Osbornmail@aol.com
> Cc: rp-ml@rapid.lpt.fi
> Subject: RE: some questions about RP technologies / Future of STL format
>
>
> This is a multi-part message in MIME format.
>
> ------=_NextPart_000_0035_01C42798.8C2BF5E0
> Content-Type: text/plain;
> charset="us-ascii"
> Content-Transfer-Encoding: 7bit
>
> Nick,
>
> Long time in answering this thread. There appear to me to be two possible
> course of action. First is to move toward an improved mesh format that is
> in the public domain. Certainly in our world that would be 3DS. VRML is
> seems has come to a dead end but perhaps it will come back again. We found
> endless compatability problems with VRML.
>
> The other way to go is, like you said, for RP machines to support a common
> slice format. This is perhaps more do-able in the near term. Allow middle-
> ware sofware pre processors to export the slice format much like Magics
> does.
>
> Charles
> -----Original Message-----
> From: Osbornmail@aol.com [mailto:Osbornmail@aol.com]
> Sent: Thursday, April 08, 2004 2:51 PM
> To: cwho@lgmmodel.com
> Cc: rp-ml@rapid.lpt.fi
> Subject: Re: some questions about RP technologies / Future of STL format
>
>
> Charles
>
> A good point, but (without wishing to re-hash all the previous comments on
> this topic) what do you recommend be done (realistically, commercially,
> etc.) in order to improve the appeal of RP and help extend the market /
> applicability? Having recently attended the Solid Modelling show in the UK
> (3D CAD show with a smattering of RP stirred into the mix) I don't see it as
> a priority for the CAD vendors right now (am I wrong?).
>
> We know how many zillions of facets you have to model into a piece of
> jewellery (for example) in order to get it to build in a half decent
> shape...surely as the RP machines get better and better at building hi res.
> parts then this issue will become more and more important? Are we
> predicting that before much longer the STL file format will be exposed and
> found wanting?
>
> The crude answer is to chuck more computing power at the problem and stick
> with triangles. A more elegant solution may include slicing IGES files (for
> instance) into CLI files (for instance) which a number of machine vendors
> have toyed with in the past.
>
> I am constantly amazed at the number of people (e.g. design engineers
> involved in manufacturing industries) who still have ansolutely no idea what
> an STL file is...but maybe that's just me.
>
> There has GOT to be a better way...
>
> Regards
>
> Nick
>
> Nick Osborn
> Director
> Fenland RP Ltd
> Mobile: +44 (0) 7881 92 00 38
> Tel: +44 (0) 1406 350 124
> Fax: +44 (0) 1406 350 183
> www.fenlandrp.co.uk
>
> In a message dated 05/04/2004 18:11:46 GMT Standard Time,
> charles@lgmmodel.com writes:
>
>
>
> Subj:RE: some questions about RP technologies
> Date:05/04/2004 18:11:46 GMT Standard Time
> From:charles@lgmmodel.com
> Reply-to:cwho@lgmmodel.com
> To:rp-ml@rapid.lpt.fi
> Sent from the Internet
>
>
>
>
> >how to transfer 3D
> > > > solid model to neutral format such as STL or others
>
> To my knowledge, there is no way, within the "accepted" stl format to
> describe anything other than surface geometry. STL does not do a very
> good
> job at that either! I will go out on a limb and say that, for various
> reasons, the two efforts at color description within the STL file have,
> to
> date, failed.
>
> I think that yours is one of many cases that expose the inadequacy of
> the
> STL format as the basis for RP into the future. IMHO, STL is a
> significant
> obstacle for the continuing development of RP in new markets and new
> applications.
>
> This is something the list has debated in the past, unfortunately
> without
> significant input from machine vendors who, for obvious reasons, need to
> be
> significant party to any effective solution. What is the correct forum
> for
> ongoing discussion? How might it be facilitated?
>
>
> Charles
> LGM
>
> > -----Original Message-----
> > From: owner-rp-ml@rapid.lpt.fi [mailto:owner-rp-ml@rapid.lpt.fi]On
> > Behalf Of Amy Hu
> > Sent: Sunday, April 04, 2004 5:56 PM
> > To: psuomala@sandersdesign.com; rp-ml@rapid.lpt.fi
> > Subject: Re: some questions about RP technologies
> >
> >
> > Dear Paul,
> >
> > Thanks a lot for your response.
> >
> > You said it. My question is very general. From the theory of
> additive
> > fabrication, all RPTs can produce functional gradient material produts
> or
> > heterogeneous material object which material composition can vary by
> given
> > pattern. Actually, by then there are only a few RPTs which can
> > complete this
> > task, to name one I have knew is LENS. LENS can fabricate the
> functional
> > gradient material by controlling the power of laser and powder
> deposition
> > speed. But this process is random and the pattern of material
> composition
> > only can be know after fabrication. What I want to know is if I have
> > designed ah heterogeneous objects which have a specified material
> > distribution, how RPTs can fabricate automatically? What kind of
> processes
> > and software have to be designed or modified spefically? I am not sure
> > whether I have make my question clear. Anyway, thanks for your help.
> >
> > Yuna
> > ----- Original Message -----
> > From: "Paul Suomala" <psuomala@sandersdesign.com>
> > To: "Amy Hu" <hu_yuna@hotmail.com>
> > Sent: Sunday, April 04, 2004 3:57 PM
> > Subject: Re: some questions about RP technologies
> >
> >
> > > Amy Hu wrote:
> > >
> > > > Hi all,
> > > >
> > > > How are you doing?
> > > >
> > > > I am a graduate student in Clemson University. I have some
> problems
> > > > about how to fabricate heterogeneous metal parts by using LENS or
> > > > other possible RP technologies. If I had a part with specified
> > > > material composition (have some gradient locally), are there any
> solid
> > > > modeling software can represent this kind of parts, how to
> transfer 3D
> > > > solid model to neutral format such as STL or others? If somebody
> has
> > > > this kind of experience, could you please give me some hints?
> > > >
> > > > Thanks a lot and have a good day.
> > > >
> > > > Best Regards
> > >
> > > Your questions seem rather general. Have you searched in your own
> "back
> > > yard" ?
> > > http://www.vr.clemson.edu/rp/
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
>
>
>
>
>
> ------=_NextPart_000_0035_01C42798.8C2BF5E0
> Content-Type: text/html;
> charset="us-ascii"
> Content-Transfer-Encoding: quoted-printable
>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> <HEAD>
> <META http-equiv=3DContent-Type content=3D"text/html; =
> charset=3Dus-ascii">
> <META content=3D"MSHTML 6.00.2800.1106" name=3DGENERATOR></HEAD>
>
> <DIV><SPAN class=3D625055017-21042004>
> size=3D2>Nick,</SPAN></DIV>
> <DIV><SPAN class=3D625055017-21042004>
> size=3D2></SPAN> </DIV>
> <DIV><SPAN class=3D625055017-21042004>size=3D2>Long=20
> time in answering this thread. There appear to me to be two =
> possible=20
> course of action. First is to move toward an improved mesh format =
> that is=20
> in the public domain. Certainly in our world that would be 3DS. =
> VRML is=20
> seems has come to a dead end but perhaps it will come back again. We =
> found=20
> endless compatability problems with VRML. </SPAN></DIV>
> <DIV><SPAN class=3D625055017-21042004>
> size=3D2></SPAN> </DIV>
> <DIV><SPAN class=3D625055017-21042004>size=3D2>The=20
> other way to go is, like you said, for RP machines =
> to support a=20
> common slice format. This is perhaps more do-able in the near =
> term. =20
> Allow middle- ware sofware pre processors to export the slice format =
> much like=20
> Magics does.</SPAN></DIV>
> <DIV><SPAN class=3D625055017-21042004>
> size=3D2></SPAN> </DIV>
> <DIV><SPAN class=3D625055017-21042004>
> size=3D2>Charles</SPAN></DIV>
> <BLOCKQUOTE=20
> style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
> solid">
> <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>face=3DTahoma=20
> size=3D2>-----Original Message-----
> From: Osbornmail@aol.com =
>
> [mailto:Osbornmail@aol.com]
> Sent: Thursday, April 08, 2004 =
> 2:51=20
> PM
> To: cwho@lgmmodel.com
> Cc:=20
> rp-ml@rapid.lpt.fi
> Subject: Re: some questions about RP =
> technologies=20
> / Future of STL format
>
> </DIV>face=3Darial,helvetica><FONT=20
> size=3D2 PTSIZE=3D"10">Charles
>
> A good point, but (without =
> wishing to=20
> re-hash all the previous comments on this topic) what do you recommend =
> be done=20
> (realistically, commercially, etc.) in order to improve the appeal of =
> RP and=20
> help extend the market / applicability? Having recently attended =
> the=20
> Solid Modelling show in the UK (3D CAD show with a smattering of RP =
> stirred=20
> into the mix) I don't see it as a priority for the CAD vendors right =
> now (am I=20
> wrong?).
>
> We know how many zillions of facets you have to model =
> into a=20
> piece of jewellery (for example) in order to get it to build in a half =
> decent=20
> shape...surely as the RP machines get better and better at building hi =
> res.=20
> parts then this issue will become more and more important? Are =
> we=20
> predicting that before much longer the STL file format will be exposed =
> and=20
> found wanting?
>
> The crude answer is to chuck more computing =
> power at the=20
> problem and stick with triangles. A more elegant solution may =
> include=20
> slicing IGES files (for instance) into CLI files (for instance) which =
> a number=20
> of machine vendors have toyed with in the past.
>
> I am constantly =
> amazed=20
> at the number of people (e.g. design engineers involved in =
> manufacturing=20
> industries) who still have ansolutely no idea what an STL file =
> is...but maybe=20
> that's just me.
>
> There has GOT to be a better=20
> way...
>
> Regards
>
> Nick
>
> Nick =
> Osborn
> Director
> Fenland RP=20
> Ltd
> Mobile: +44 (0) 7881 92 00 38
> Tel: +44 (0) 1406 350 =
> 124
> Fax: +44=20
> (0) 1406 350 183
> www.fenlandrp.co.uk
>
> In a message dated =
> 05/04/2004=20
> 18:11:46 GMT Standard Time, charles@lgmmodel.com writes:
>
>
>
> <BLOCKQUOTE=20
> style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
> solid; MARGIN-RIGHT: 0px"=20
> TYPE=3D"CITE">Subj:RE: some questions about RP technologies=20
>
> Date:05/04/2004 18:11:46 GMT Standard Time
> From:<A=20
> =
> href=3D"mailto:charles@lgmmodel.com">charles@lgmmodel.com
> Reply-to=
> :<A=20
> href=3D"mailto:cwho@lgmmodel.com">cwho@lgmmodel.com
> To:<A=20
> href=3D"mailto:rp-ml@rapid.lpt.fi">rp-ml@rapid.lpt.fi
> Sent =
> from the=20
> Internet
>
>
>
>
> >how to transfer 3D
> > > =
> >=20
> solid model to neutral format such as STL or others
>
> To my =
> knowledge,=20
> there is no way, within the "accepted" stl format to
> describe =
> anything=20
> other than surface geometry. STL does not do a very =
> good
> job at=20
> that either! I will go out on a limb and say that, for=20
> various
> reasons, the two efforts at color description within the =
> STL file=20
> have, to
> date, failed.
>
> I think that yours is one of many =
> cases=20
> that expose the inadequacy of the
> STL format as the basis for RP =
> into the=20
> future. IMHO, STL is a significant
> obstacle for the =
> continuing=20
> development of RP in new markets and =
> new
> applications.
>
> This is=20
> something the list has debated in the past, unfortunately=20
> without
> significant input from machine vendors who, for obvious =
> reasons,=20
> need to be
> significant party to any effective solution. =
> What is the=20
> correct forum for
> ongoing discussion? How might it be=20
> facilitated?
>
>
> Charles
> LGM
>
> > -----Original=20
> Message-----
> > From: owner-rp-ml@rapid.lpt.fi=20
> [mailto:owner-rp-ml@rapid.lpt.fi]On
> > Behalf Of Amy Hu
> > =
> Sent:=20
> Sunday, April 04, 2004 5:56 PM
> > To: =
> psuomala@sandersdesign.com;=20
> rp-ml@rapid.lpt.fi
> > Subject: Re: some questions about RP=20
> technologies
> >
> >
> > Dear =
> Paul,
> >
> > =20
> Thanks a lot for your response.
> >
> > You said =
> it. My=20
> question is very general. From the theory of additive
> > =
> fabrication,=20
> all RPTs can produce functional gradient material produts or
> > =
>
> heterogeneous material object which material composition can vary by =
>
> given
> > pattern. Actually, by then there are only a few RPTs =
> which=20
> can
> > complete this
> > task, to name one I have knew is =
> LENS.=20
> LENS can fabricate the functional
> > gradient material by =
> controlling=20
> the power of laser and powder deposition
> > speed. But this =
> process is=20
> random and the pattern of material composition
> > only can be =
> know=20
> after fabrication. What I want to know is if I have
> > designed =
> ah=20
> heterogeneous objects which have a specified material
> > =
> distribution,=20
> how RPTs can fabricate automatically? What kind of processes
> > =
> and=20
> software have to be designed or modified spefically? I am not =
> sure
> >=20
> whether I have make my question clear. Anyway, thanks for your=20
> help.
> >
> > Yuna
> > ----- Original Message =
> -----
> >=20
> From: "Paul Suomala" <psuomala@sandersdesign.com>
> > To: =
> "Amy Hu"=20
> <hu_yuna@hotmail.com>
> > Sent: Sunday, April 04, 2004 =
> 3:57=20
> PM
> > Subject: Re: some questions about RP=20
> technologies
> >
> >
> > > Amy Hu wrote:
> > =
> >
> >=20
> > > Hi all,
> > > >
> > > > How are =
> you=20
> doing?
> > > >
> > > > I am a =
> graduate=20
> student in Clemson University. I have some problems
> > > =
> > about=20
> how to fabricate heterogeneous metal parts by using LENS or
> > =
> >=20
> > other possible RP technologies. If I had a part with =
> specified
> >=20
> > > material composition (have some gradient locally), are =
> there any=20
> solid
> > > > modeling software can represent this kind of =
> parts,=20
> how to transfer 3D
> > > > solid model to neutral format =
> such as=20
> STL or others? If somebody has
> > > > this kind of =
> experience,=20
> could you please give me some hints?
> > > >
> > >=20
> > Thanks a lot and have a good day.
> > > =
> >
> > >=20
> > Best Regards
> > >
> > > Your questions seem =
> rather=20
> general. Have you searched in your own "back
> > > yard" =
> ?
> >=20
> > http://www.vr.clemson.edu/rp/
> > >
> > >
> > =
>
> >
> > >
> > >
> >=20
> =
> >
> >
> >
>
>
>
> </BLOCKQUOTE>
>
>
> </BLOCKQUOTE=
> >
>
> ------=_NextPart_000_0035_01C42798.8C2BF5E0--
>
>
>
>
>
Nick Osborn
Consultant
Fenland RP Ltd
Mobile: +44 (0) 7881 92 00 38
Tel: +44 (0) 1406 350 124
Fax: +44 (0) 1406 350 183
www.fenlandrp.co.uk
Received on Wed Apr 28 13:38:03 2004
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