Re: Some easy questions

From: Phil Orenstein (
Date: Tue Mar 17 1998 - 09:20:00 EET

Dear Irene, Pedro & all,

Some difficult answers. At the December SME conference on RP&T,
objective results on RP system's accuracy gathered from the experience
of various users and service bureaus repoted that SLA is the best,
holding down a demensional acurracy that could be off by as much as +/-
.002 inch/inch. The other systems fall in behind with LOM being the
worst. We have an FDM 1650 which seems to fall within an overall
tolerance of +/- .010 to .015". With the laser systems, the larger the
part the greater the inaccuracy which is due to the distortion from the
angular deflection of the lazar beam. Thus, even on an SLA, a 10" part
could be off by as much as +/- .020"! To me this is unacceptable for
applications other than concept modeling such as tooling and
engineerinig verification. Any comments on these reports?

Phil Orenstein
P.O.P.Display Inc.

Irene Quinlan wrote:
> The ModelMaker II machine by Sanders Prototype is accurate to
> 0.013mm in the Z axis and 0.025mm in the X/Y axis, with a
> minimum wall thickness of 0.1mm. For more information, see
> our web page at
> Irene Quinlan
> Pedro Garayo wrote:
> > Dear rpmlers,
> >
> > Are there any systems able to obtain an accuracy of 0,07 mm. or
> > better?
> > Is it SLS(using PA11) the most suitable for prototypes to be used in
> > an
> > assembly?
> > (The part fits in 250x100x40 mm. and it is 1.5 mm. thick)
> >
> > Thank you very much.
> >
> > Pedro Garayo
> >
> >
> > For more information about the rp-ml, see
> For more information about the rp-ml, see

For more information about the rp-ml, see

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