Re: SLA- Viper

From: Sarin Sundar (
Date: Wed Oct 16 2002 - 04:50:05 EEST


What kind of Laser Optics are you looking for? can you send me details
or a list of them. there are a lot of optics manufacturers & suppliers
who can supply at competetive prices. YES Optics can be replaced in
parts(different optics) and that depends on the type of laser and
condition of optics.

"speed of laser is inversaly proportonal to the life of laser"
well.....I dont think so. Speed of laser usually depends on the Output
Power, mode, material and processing conditions. If lasers become "old"
   there could be several factors usually you dont get enough Laser power
out or may be contaminated / dirty optics (resonator, external &
focussing) requiring replacement or even a misaligned cavity.

Sarin Sundar
Centre for Laser Processing of Materials
Hyderabad, India

Patwa jeevan wrote:

>Dear list,
>I am a post graduate person from IIT having
>specialisation in CAD and RP.
>I have some issues regarding SLA / Viper system.I
>would like to get the clarification from all of you on
>these issues.The issues are following:
>1. Laser Optics replacement: 3D systems gives the
>warranty of 7500 hrs for their laser optics.After that
>the whole laer optics need to be changed which costs
>around $50,000.This is pretty costly affair to change
>whole laser optics.Recently 3D systems claim that
>there is no need to change the whole laser optics, but
>it can be repaired in parts.IS THIS TRUE?
>2. Laser Age: As laser gets old the speed gets
>reduced.That means the speed of laser is inversaly
>proportonal to the life of laser.As its get older,
>speed reduces.IS THIS TRUE and what is this factor of
>proportionality.By what percetage it gets reduced?
>3. Resin Contamination: After 30-40 runs the whole wat
>of resin needs to be replaced due to contamination.It
>cause a great loss of material.IS THIS TRUE?
>These issues are very crucial while deciding on the
>SLA / Viper for business plan since it reflects
>greatly on the costing. Hence i would like your
>clarification on these issues.
>I would particularly appreciate comments and
>clarification from SLA / Viper users and 3D Systems'
>experts on these issues.
>Respectfully Yours
>Jeevan Patwa.

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