RE: SLS Somos problem

From: Brent Stucker (
Date: Thu May 14 1998 - 17:45:02 EEST


We have run Somos 201 parts with fairly good success. One thing we have not
yet tried, but I would do if I had that problem, would be to build a base for the
part. I would lightly sinter (for about 4 or 5 layers) the entire build cylinder. I
would imagine you used to do that (or maybe still do) if you ran polycarbonate
in the past. If you get your settings right, your base should pull away from the
part easily but should be durable enough to hold down the edge of the cylinder
at the beginning of the build.

I would be happy to discuss other ideas if you would like.


Dr. Brent Stucker
Assistant Professor
University of Rhode Island
Dept. of Industrial and Manufacturing Engineering
Gilbreth Hall, 2 East Alumni Ave.
Kingston, RI 02881
ph: (401)874-5187
fax: (401)874-5540

From: Drew Brown[]
Sent: Thursday, May 14, 1998 9:42 AM
Subject: SLS Somos problem

We have been having difficulty running the DuPont Somos 201 in our
Sinterstations. The problem seems to appear on mostly tubular parts in
which the edge leading into the roller pulls away from the part bed.
Eventually the part lifts and the build needs to be aborted. DTM has
told us to increase the layer thickness to .008", lower the bed temps,
lower the laser power and slow down the roller but it hasn't resolved
our problems.

I've talked with some companies that have actually abondoned Somos.

If anyone has had success with running Somos and would like to offer
some suggestions it would be appreciated.

Drew Brown
Conceptual Reality L.L.C.

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