Re: Second update to "comparing 3D Systems SLA 7000 to Sony SCS 8000D"

Nick,

Great work! I would love to receive your spreadsheet you speak about. I
greatly appreciate you sharing your findings with the rest of the list.

Best regards,

Paul Bordner II VP of Operations Laser Reproductions 950 Taylor Station Road
Suite E Gahanna, Ohio 43230 phone 614.552.6905 fax 614.552.6907 mobile
614.206.0436 www.laserrepro.com
----- Original Message -----
From: "SCHAEFER,NICK (HP-Boise,ex1)" <nick.schaefer@hp.com>
To: "'RPML'" <rp-ml@rapid.lpt.fi>
Sent: Monday, January 12, 2004 6:17 PM
Subject: Second update to "comparing 3D Systems SLA 7000 to Sony SCS 8000D"

> Hello all,
>
> I have now received parts from both 3D Systems and Sony and have the
> following to report. Please note although the subject says Sony
SCS-8000D,
> the parts received from Sony were build on a SCS-8000, however they did
> provide an estimated build time for the 8000D.
>
> I created a benchmark part and STL file in SolidWorks and sent it and a
> request for parts from both 3D Systems and Sony. I did not specify any
> particular resin, layer thickness, or build orientation, however I did
> request they leave about 1/3 of the supports on the part.
>
> 3D systems was the first to send me a part. It had all the supports left
on
> it and the vertical walls were rather ruff to a point that running my
> fingernail over them felt rough. There were also a few other places on
> surfaces with very large radii that had some rough spots on them.
>
> During a phone conversation with 3D Systems about the part I mentioned
what
> I thought about the rough vertical walls and they built two additional
parts
> made of different resin and orientation and sent them to me right away.
> They also used an un-released beta version of build software of which may
or
> may not have had more to do with better parts than the resin and
orientation
> did. Both of these parts were much better, especially one that was build
in
> a double 45 degree angle of which had almost no supports at all.
>
> The Sony part was a long time in arriving and in fact it took the last
Email
> I sent to this list saying that I had not yet received the part from Sony
as
> yet and was getting concerned. The next morning I got an Email and
apology
> from Sony, and the part arrived the next day. The Sony part has a very
> smooth finish on all surfaces except on both sides of one web that has a
> very large radius on it and also had supports on top and bottom of it.
>
> We also built the part on our SLA 250/50.
>
> None of the parts were built in the exact same orientation so I don't have
> build time data as yet that is an accurate benchmark.
>
> I have done some measuring of the parts and have determined the Sony part
to
> be the most accurate in general.
>
> Build times of parts that were done in similar (although not exactly) the
> same orientation are:
> SLA 7000 = 16 hrs. 57 min, Sony SCS-8000 = 17 hrs. 47 min. and SLA 250 =
26
> hrs. 6 min. (An estimated build time on the Sony SCS-8000D with twin beam
> was 13 hrs. 42 min.)
>
> With all that said, 3D Systems has been the most responsive to our
requests
> and the second & third parts were much better than the first. Sony has
> been difficult to get parts and information from but the one part they
sent
> has a nice finish with the exception listed above and is very accurate.
> After I receive the addition part(s) from Sony I will send an update to
the
> list.
>
> Also I have a zip file with an Excel spread sheet with build data
including
> but not limited to dimensional accuracy, resin, laser power, beam spot
size,
> build times, CAD images of build orientation from all parts, plus the STL
> file. The zip file is 436 KB in size. I will be happy to send the zip
file
> in response to any Email requests I receive.
>
>
> --------
> Best regards,
>
> Nick Schaefer
> Boise Site Mechanical Engineering Services
> Phone: (208) 396-4884
> Fax: (208) 396-2906 or (208) 396-2338
>
>
>
>
>
Received on Tue Jan 13 16:10:30 2004