Al and list,
Hmmmm, looks like he is correct, at least according to published
Coherent specifications. Check out
http://www.cohr.com/clg/support/clg_ts_water/clg_ts_waterguidex.html
--- Regards, Dan Davis PROTON Rapid Prototyping & Manufacturing Center Hicom Industrial Estate, Batu Tiga, PO Box 7100 Shah Alam, 40918 Selangor MALAYSIA +60 3 515-2380 phone/fax http://www.protoncar.com/rapid.htm> -----Original Message----- > From: ERIC KING [SMTP:lzrdude@earthlink.net] > Sent: Wednesday, March 10, 1999 2:00 AM > To: long time > Cc: rp-ml@bart.lpt.fi > Subject: Re: SLA-500, heat exchangers > > long time wrote: > > > > wouldn't a thermometer in the reservoir validate the functionality > of > > the heat exchanger? also the laser should shut down on an over temp > > prior to any damage? and what serious damage will it cause? is the > > detailed literature too long to post on the m/l? > > Al Sims > > > > > > > >Dear list, > > > > > >Please check your heat exchanger. > > > > > >It has come to our attention that there are several problems > > >concerning the Laser Pure heat exchangers on the SLA-500 machines: > > > > > >1) The Coherent "Laser Pure 20" heat exchangers out in the field, > > > are not the correct model, and may cause severe damage to your > > > laser. They were not intended to be used with this model laser, > > > and we can supply detailed literature upon your request. > > > > > >2) We have also seen "Laser Pure 40" models with the wrong > > > internal components. Which also may cause laser problems. > > > > > > To check for the correct component, remove the top lid, > > > and remove the side panel from the LP-40 unit. > > > (the side that has all the water fittings) > > > Locate the stainless steel heat transfer unit. > > > The unit should have the model # CB26-90H, > > > if it does not, please contact us. > > > > > >We have only seen these problems, on systems with dates prior to > > >1992. > > > > > >If you have questions, or need more info, please contact us: > > > > > >Laser Innovations > > >(805) 529-5864 tel > > > 6621 fax > > >sla-500@laserinnovations.com > > > > > >Best regards, > > > > > >Eric King > > > > > >For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/ > > > > ______________________________________________________ > > Get Your Private, Free Email at http://www.hotmail.com > > > > For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/ > > Dear Mr. "long-time" Sims > > Yes, a thermometer will till you that the heat exchanger is doing > it's job, at that point in time, but the LP-20 is rated at ~19 > Kilowatts. > The laser is feeding ~16K in, which leaves very little room for > fluctuations > in the secondary cooling loop, of the plant water. > > Yes, the laser "should" shut down. But, we all know how reliable > electronics are. > > I have repaired quite a few laser systems, that have had a run in > with poor "fail-safe" devices. > > As for serious damage, the plasma tube could crack - and become an > expensive aquarium for your gold fish, the magnet will be fried, and > I would also check the passbank for any bad transistors. > > Yes, the literature (AKA owners manual) would be too much to post. > I have plenty of copies, for those who need them. As well as laser > manuals, for the Coherent laser systems. > > Of the 4 water filled laser tubes we have seen in the past year, 3 > were > running on LP-20's , and 1 was on an LP-40. > > Un-expected down time, for the RP industry, is very painful. I was > just > trying to let everyone know what we have seen. The LP-20's should have > been replaced years ago by 3D; when the lasers were upgraded from the > 325's, > 326's to the now high current 328 laser systems. > > Best regards > > Eric > > For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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