Fw: Thermojet software

From: Marshall Burns (Marshall@Ennex.com)
Date: Mon Jul 24 2000 - 09:01:54 EEST


    I have two questions about your recent posting on ThermoJet software.

    First, I don't understand what is illustrated in your attachment figure.
What is meant by the diagonal lines? My understanding is that the ThermoJet
deposits supports as strictly vertical filaments. Is the ThermoJet capable
of depositing diagonal filaments that can serve as connections between
vertical filaments, like triangle trusses? If that's what you're indicating,
then the supports shown holding up the downfacing surfaces would seem to be
analogous to castling in SLA supports. Is that correct?

    My second question is why it is more of a problem to clean the stubble
of supports from upfacing than from downfacing surfaces and from the
vertical surface shown connecting to the support structure in your
right-hand drawing. Your illustration seems to show the vertical filaments
as thicker lines than the diagonal filaments. Is this indicative of a
characteristic that makes cleanup difficult?

    Thank you if you can clear up my confusion on this.

Best regards,
Marshall Burns
President, Ennex Corporation

Los Angeles, USA, (310) 397-1314

----- Original Message -----
From: "Andrzejewski, Jan" <jan.rp@pera.com>
To: "'3D Systems product suggestions'" <productsuggestions@3dsystems.com>
Cc: "'rp-ml'" <rp-ml@bart.lpt.fi>
Sent: Friday, July 21, 2000 4:36 AM
Subject: Thermojet software

> A very difficult problem is the amount of cleaning up from the supports on
> areas other than downfacing surfaces. These are easy to clean because of
> automatic software creating fine support structures.
> But the upfacing surfaces that come under the shadow of downfacing
> do not have this fine supporting structure and makes these surfaces prone
> problems when cleaning.
> When multiple parts of the same component are built then the supports are
> not the same and slight differences do tend to scar the component
> when the thicker columns of supports are too close to vertical surfaces
> are part of the overhanging features.
> In this same region I had text that protruded out as an overhang feature
> from a vertical wall and these were impossible to clean up.
> It is very difficult to get clients to accept that we do not have any
> control over the support generation when you give them 6 parts and 1 out
> the five is excellent and the other five all show signs of support scaring
> and attempts to clean then up.
> It only needs to be a software upgrade then all existing users will
> Jan Andrzejewski jan.rp@pera.com
> RP Project Manager
> Technology Centre
> Nottingham Road
> Melton Mowbray
> Leicestershire
> LE13 0PB
> UK
> Tel +44 (0) 1664 501501 Fax +44 (0) 1664 501556
> <<supports.bmp>>

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