RE: Aspect ratios for holes in SLA

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.

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: [] Sent: Thursday, January 06, 2000 5:11 AM To: 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 on 01/05/2000 01:57:32 PM

To: rp-ml <> @ 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

For more information about the rp-ml, see

------ Message Header Follows ------ Received: from by (PostalUnion/SMTP(tm) v2.1.9f for Windows NT(tm)) id AA-2000Jan05.135712.1141.465058; Wed, 05 Jan 2000 13:57:14 -0500 Received: from ([]) by with ESMTP id <115202>; Wed, 5 Jan 2000 14:01:17 -0500 Received: from major by with local (Exim 1.90 #2) for id 125vE1-00071l-00; Wed, 5 Jan 2000 18:32:01 +0000 Received: from ([] by with smtp (Exim 1.90 #2) for id 125vE0-0000hY-00; Wed, 5 Jan 2000 20:32:00 +0200 Received: by SMTP MTA v4.6.3 (778.2 1-4-1999)) id 8525685D.0065D451 ; Wed, 5 Jan 2000 13:32:14 -0500 X-Lotus-FromDomain: BDX From: To: Message-ID: <> Subject: Aspect ratios for holes in SLA Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sender: Precedence: bulk Date: Wed, 5 Jan 2000 14:01:08 -0500

For more information about the rp-ml, see

For more information about the rp-ml, see

This archive was generated by hypermail 2.1.2 : Tue Jun 05 2001 - 23:02:33 EEST