RE: Aspect ratios for holes in SLA

From: joe@nttd-cmet.co.jp
Date: Thu Jan 06 2000 - 02:45:31 EET

I have the experience to build 0.2 mm holes of square and circle which the thickness is 7 mm. After building, I clean it by alcohol and air gun. Last month, I built a square hole of 0.1x2mm which thickness is 3.5mm.

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PhD  Yi   XU
NTT DATA CMET
15-8,Kamata 5-Chome, Ohta-Ku, Tokyo 144-0052, Japan
Tel:+81-3-3739-6611   Fax:+81-3-3739-6680
-----Original Message-----
From:	Beth_P_Israelnaim@bd.com [SMTP:Beth_P_Israelnaim@bd.com]
Sent:	Thursday, January 06, 2000 5:11 AM
To:	rp-ml@bart.lpt.fi
Subject:	Re: Aspect ratios for holes in SLA
I guess I should have also stated that the hole sizes that I'm working with are
between 0.005" and 0.020".
Thanks again,
Beth
Beth_P_Israelnaim@bd.com on 01/05/2000 01:57:32 PM
To:   rp-ml <rp-ml@bart.lpt.fi> @ INTERNET
cc:
Subject:  Aspect ratios for holes in SLA
Dear RPML Friends,
I am currently building some small parts with small diameter holes and have run
into somewhat of a problem cleaning the liquid resin out of these holes as the
length of these holes get longer.  This problem has lead me to wonder two
things:
1.  How small of a hole are other users able to build on their SLA's and on
that
smallest diameter hole you can build, what is the length of the span that the
hole can travel and still be cleaned out.  What SLA system are you using and
what resin are you building with?
2.  Has any University or Consortium project evaluated the different systems
and
their resins/powers to see what aspect ratios can be achieved with the
different
resins/powders and their viscosity's and or particle size?
Thank you in advance for any information you can share.   If there appears to
be
enough interest I will tabulate and share the results with the RPML.
Beth Israelnaim
RP Specialist
BD Technologies
P.O. Box 12016
RTP, NC  27709
919.990.2153
bisraeln@bd.com
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From: Beth_P_Israelnaim@bd.com
To: rp-ml@bart.lpt.fi
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Subject: Aspect ratios for holes in SLA
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Date: Wed, 5 Jan 2000 14:01:08 -0500