Re: Laser recharging/replacement ? CORRECTION!

From: Megsinet (
Date: Sun Apr 18 1999 - 08:22:43 EEST

I want to apologize for some incorrect information I passed in my previous
email. Coherent is 3D Systems' provider of lasers for the SLA 500s, NOT the
250s. It is Omnichrome that provides lasers for the SLA 250s these days.
Call it "technical dyslexia". I should read my mail more closely before
sending it out and maybe shouldn't type at all when half asleep. :) Again,
sorry. Although, I believe Coherent did make a laser for the SLA 250 at one


----- Original Message -----
From: Megsinet <>
To: <>; Simon Slater <>
Sent: Saturday, April 17, 1999 1:00 AM
Subject: Re: Laser recharging/replacement ?

> Simon-
> The recharges are usually referred to as "re-tubing". If you decide to go
> with another laser manufacturer other than Coherent (3D sponsored), you
> to keep in mind that, if you have a maintenance contract on your SLA 250,
> field engineers will not touch the non-Coherent laser. You will be
> to tune and maintain the laser by yourself, but for the most part, this is
> quite simple. A supplier will usually provide a manual or offer technical
> assistance over the phone.
> Re-tubing a laser usually costs between 60%-70% of the cost of the
> laser and is guaranteed from 50%-70% of the power spec at 2500-3000
> You can usually negotiate these numbers, to a small degree, with a
> supplier.
> Example: A new 40mw, 325nm HeCd laser for $16,000.00 will cost about
> $11,000.00 for a re-tube. If the power drops below 28mw before 2500 hours
> (70% power spec in this case), the supplier, in most cases, will send you
> swap laser with about 10-15 extra mw or if you are lucky, a new laser.
> seen the latter happen a few times :)
> Other than Coherent, there are three manufacturers that I know of that
> lasers for SLA 250s: Omnichrome and Liconix (both of which are being
> out by Melles Griot in the next few months) and a Japanese
> manufacturer.....I don't have the name handy, I can find it for you if
> needed. Incidentally, this Japanese manufacturer has been around for a
> time and had approached 3D Systems around 1993-94 asking to be their laser
> supplier for the 250 systems. 3D Systems opted for Coherent.
> Hope this helped,
> Bill Ballmaier V.P.
> Scimitar Prototyping Inc.
> 1529 Bourbon Parkway
> Streamwood, IL 60107
> Phone: 630-483-3875
> Fax: 630-483-3876
> EMail: (active 5/3/99)
> ----- Original Message -----
> From: Simon Slater <>
> To: <>
> Sent: Friday, April 16, 1999 9:31 AM
> Subject: Laser recharging/replacement ?
> Hello RPML,
> Does anyone know or heard of Lasers for 3DSsytems SLA machines being
> recharged and at what cost ?
> What are the charges for replacement lasers on an SLA 250, because i have
> been lead to believe that these vary according to type of maintenance
> contract and number of machines owned ?
> Can anyone shed any light on this subject or let me know the sort of costs
> involved in your experiences ? If anyone one has any kind of detailed
> analogies would it be possible for you to share these with me. Thankyou
> any help in advance !!
> Regards
> Simon Slater
> RP Development Engineer
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