Re: Raising Liquid Levels in SLA250

From: Jeng (
Date: Tue Oct 09 2001 - 03:55:44 EEST

We have developed a special liquid, which is really cheap (only several
dollars a gallon) in comparison with photo-polymer used in the SLA system.
Its density is higher than that of photo-polymer, so it always stays beneath
the photo-polymer. It has been physically and chemically tested using DSPC
for its stability with photo-polymer. We found it is very stable. In fact,
this liquid has been used at National Taiwan University of Science and
Technology in Taiwan for a while to developed Masked RP system. The
photo-polymer we used is from Japan Autostrade. This resin is cured in the
visible wavelength range. We have not tried it in the SLA system yet. If you
are interested in this liquid or would like to cooperate to test it in the
SLA system, please feel free to contact me.

With best regards,

Visiting Scholar
Professor Jeng-Ywan Jeng
Department of Electronic and Computer Engineering
University of California
Santa Barbara, CA 93106-9560
Office: 805.893.2723
Fax: 805.893.5440

Professor Jeng-Ywan Jeng
National Taiwan University of Science and Technology
Department of Mechanical Engineering
Office: +886-2-27376466
Fax: +886-2-27376460
----- Original Message -----
From: "Zubrickie, Robert F" <>
To: <>
Sent: Monday, October 08, 2001 7:02 AM
Subject: RE: Raising Liquid Levels in SLA250

> Michael,
> During these cutback times I have been forced to raise my resin
> levels just to make parts on a daily bases. I removed approximately one
> gallon of resin and put aluminum blocks in the bottom of my vat. This will
> take up the volume. Then as you start you machine you can use the removed
> resin to top off the resin level. Be very careful when doing this. If the
> SLA machine goes through a full initialization you will break your Z axes
> elevator. The second thing you must keep in mind is when you run your
> machine; you can not run any parts larger than the distance from the top
> your submerged blocks to the top of your resin. If you do your z axis will
> also crash as well. When you are done with using up your resin contact me.
> am looking for cheep resin. (RPC100HC, 8110, SL5220)
> Global Communications, Computer & Consumer Electronics Business
> _______________________________________________
> | Robert F. Zubrickie
> |Manufacturing Engineer
> |Rapid Prototyping Area
> |3101 Fulling Mill Road, MS 128-98
> | Middletown, Pa 17057-3164
> |
> | E-Mail:
> | Phone - (717) 592-5208
> | Fax - (717) 592-4943
> |____________________
> -----Original Message-----
> From: Michael Schmit []
> Sent: Monday, October 08, 2001 9:30 AM
> To: rp-ml news group
> Subject: Raising Liquid Levels in SLA250
> Does anyone out there know what can be used in an SLA machine to take up
> volume in order to raise the liquid level in the vat? We're in the
> of changing resins and want to be able to use as much of the existing vat
> possible; as we're trying to get as much life out of our current resin as
> can before the changeover.
> Any ideas you can give us would be much appreciated.
> Michael Schmit
> Schmit Prototypes, Inc.
> 1801 Indianhead Drive
> Menomonie, WI 54751
> 715-235-8474
> 715-235-0111(fax)
> For more information about the rp-ml, see
> For more information about the rp-ml, see

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