Jan, you got around 3 micron Ra from 5190 - Really? Sounds like the
proverbial baby's bottom!
We got more like 15 micron Ra from vertical parts on a 350 (I assume it was
SL5190).
We got more like 6 microns Ra from 5170 on a 250, similar to results by Phil
Reeves in his PhD at Nottingham. Phil's work was very much focussed on
surface roughness and his papers are probably some of the best sources of
info on this subject.
Neil
> -----Original Message-----
> From: owner-rp-ml@bart.lpt.fi [mailto:owner-rp-ml@bart.lpt.fi]On Behalf
> Of Andrzejewski, Jan
> Sent: 04 November 1999 17:39
> To: 'rp-ml'
> Subject: RE: Surface finish - Comparisons and Importance
>
>
> Just dug out some 'Talysurf' results that PERA performed on vertical test
> pieces.
>
> They were both 0.1mm layer thickness but sample 'A' was default build
> parameters and sample 'B' was user specific build parameters.
>
> This was on SL5190
>
> Sample 'A' Max RA value 3.8564 Min RA value 3.2932 Average RA value
> 3.56512 mM
>
> Sample 'B' Max RA value 1.9529 Min RA value 1.7391 Average RA value
> 1.85646 mM
>
> When I have a quite period I shall be doing the same tests in RPC 300ND
> resin at layer thickness 0.1mm 0.05mm and 0.025mm.
>
> Most of our customers consider that finer surface roughness values is very
> important in the quality of the model and because it is possible
> to achieve
> it without considerable cost implications everyone benefits.
>
> Does anyone else have any other results?
> Has 3D Systems published any comparisons of vertical surface
> roughness with
> their different approved resins.
>
> I shall also consider quoting the vertical surface roughness on our
> proposals to help the customer decide on the quality of model he wants.
>
> Jan Andrzejewski jan.rp@pera.com
> PERA
> Technology Centre
> Nottingham Road
> Melton Mowbray
> Leicestershire
> LE13 0PB
> UK
> Tel +44 (0) 1664 501501 Fax +44 (0) 1664 501556
>
>
> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
>
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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