Re: Details required about Envision Perfactory

From: Stanley Lechtzin <>
Date: Sat Jan 10 2004 - 03:54:02 EET

Hello Wyle Mansour -

Thank you for your detailed descriptions and comparisons. You state that on
the Perfactory, "you can switch between materials in less than 5
minutes". My question is, what materials are available at this time for
the Perfactory?

- Stanley

At 05:23 PM 1/9/2004, wrote:
>Dear all RP Users:
>As I am involved with EnvisionTEC in the USA, I would like to clear up
>some of the confusion you have seen from a technical standpoint on the
>Perfactory MINI system from EnvisionTEC.
>The purpose of this email is not to personally respond to Mr. John Kerr.
>The Perfactory Mini Multi Lens system from EnvisionTEC is based on Texas
>Instruments DLP technology. Simply put, a MEMS chip reflects an image
>off 1.5 million mirrors through an optical engine into the surface of the
>resin to be cured.
>The MINIMUM average life of the DLP chip is 25,000 hours.
>The system uses a visible light projector bulb to cure the resin and
>therefore no UV rlaser or jetting tecnologies are involved.
>The Final projection lens on the perfactory can be changed like changing
>the telescopic lens on you camera.
>The number of rings you can build depends on the lens system you use and
>the accuracy you require in X and Y besides the size of the rings.( lens
>F60:79x63mm, or lens F75: 55 x 44 mm, or lens F85: 42 x 34 mm working envelope)
>The rings produced require no post curing and are ready for use.
>On comparing the VIPER to MINI, I note the following:
>1-The list price of the Viper is $179,900.00 versus $59,900.00 for the
>2- The light bulb lasts an average of 850 hours and is user replaced at $1
>per hour, while the laser is $4 to 6 per hour requiring technician
>replacement installation ($35,000.00 for laser head and diode pack).
>3- NO maintenance contract for the Perfactory is needed after the first
>year, while the service contract for the viper is around $30,000.00 on the
>average, and if you do not have it, you will pay $30,000.00 for the laser
>when it goes down.
>4- The perfactory is calibrated in 7 minutes by the operator, while the
>laser beam roundness and moving the spot on the laser crystal to increase
>the power at the VAT requires a 3D technician.
>5- You require a minimum of 40 KG of material to fill the VAT to build
>your first ring, while you require 300 grams of Material to build your
>first ring on the MINI
>6- Both Systems can build high quality parts, and the maximum build
>envelope using the lens F=60mm is 79mm x 63mm in x and y
>7- The MINI system can build slices down to 20 microns in Z, and you can
>switch between materials in less than 5 minutes.
>Finally, it is possible to do nesting for simple rings by simply placing
>spruces on the rings base and running the spruces up to the platform, but
>because of the build speed and possibility to send multiple jobs to
>machine, and ease of taking old job and starting next one (2 to 3
>minutes), there is no advantage to nesting in the Z direction.
>Wyle Mansour
>Application Engineer
>EnvisionTEC , Inc

Prof. Stanley Lechtzin
Temple University
Tyler School of Art
7725 Penrose Ave.
Elkins Park, PA 19027

phone: 215-782-2863
fax: 215-635-2861
M/J/C-C web site
Online CAD/CAM I Course
Received on Sat Jan 10 04:37:57 2004

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