24seven Posted June 27, 2004 Share Posted June 27, 2004 Does any one out there know about lasors .... The reason I ask is I have being left with the mighty task of rebuilding a recenty decieced friend of mine's lasor . I have managed to get so far using memory of what it looked like in parts of it and my knoledge of moving lights has helped on other bits . But I have hit on a problem that I need a lasor pro to look at/advise. as im sure to them its a very simple problem but I have now got to stick my hand in the air and go erm I dont know :( Mark :) Link to comment Share on other sites More sharing options...
WiLL Posted June 27, 2004 Share Posted June 27, 2004 I know it's spelt lasEr, might help in any net searches you do. That's about all I know about 'em though. Although someone once told me you need a license to use one as part of a theatrical performance. Link to comment Share on other sites More sharing options...
Guest Mattladkin Posted June 27, 2004 Share Posted June 27, 2004 Also if you are going to use them for a public performance don't mess about with them yourself - anything goes wrong... Its all your fault ML Link to comment Share on other sites More sharing options...
IanG Posted June 27, 2004 Share Posted June 27, 2004 To be honest, if it's anything other than Class I/II or you're not completly confident in what you are doing I'd pass it over to a professional. Lasers can do nasty things. Link to comment Share on other sites More sharing options...
the kid Posted June 27, 2004 Share Posted June 27, 2004 To be honest, if it's anything other than Class I/II or you're not completly confident in what you are doing I'd pass it over to a professional. Lasers can do nasty things. I agree here, but I didn't think that you got above classI/II unless it was industrial or scientific I went to some labs and they had class IV. Link to comment Share on other sites More sharing options...
Guest lightnix Posted June 27, 2004 Share Posted June 27, 2004 Sensible advice. With lasers (as with rigging), it has to be a case of "If you don't know, don't do - or get a professional to do it." Link to comment Share on other sites More sharing options...
IanG Posted June 27, 2004 Share Posted June 27, 2004 I didn't think that you got above classI/II unless it was industrial or scientific You can get class IV display lasers. They're scary things. I've only seen them used pointed at waterfalls etc. I believe you have to get all kinds of permits to use them (especially outdoors) Link to comment Share on other sites More sharing options...
IanG Posted June 27, 2004 Share Posted June 27, 2004 To be honest, if it's anything other than Class I/II Actually, just to add to my own posting: remember that the lasers are classed based on their fully encased working state. It's theoretically possible for a Class I laser to become a class IV when it's uncased (although that extreme is unlikely) Link to comment Share on other sites More sharing options...
ANDYLASER Posted June 27, 2004 Share Posted June 27, 2004 Greetings All, I am assuming that it is a gas laser that you are having problems with. What laser is it?Is the problem with the laser head or the power supply?Where do you live, I may be able to put you in touch with somebody local. A little about me. My name is Andy, I have been working with show lasers for about 7 years. I have built a number of different systems, both gas and D.P.S.S., which are used regularly. You do not need a license to operate lasers. However you must submit a document known as HS(G)95 to the local Council E.H.O. before doing a show. This document lists technical specs of all equipment, operating procedures, safety procedures and contains a risk assessment. If you can supply the necessary calculations to beam exposure limits you may be allowed to crowd scan with the laser. This does depend very much on the laser and the council in question. Edit: With outdoor shows you need to file an application with the C.A.A. I hope this helps. P.M. me if you require further information. Link to comment Share on other sites More sharing options...
WiLL Posted June 28, 2004 Share Posted June 28, 2004 Well THAT cleared a lot up. Thanks Andy:D Link to comment Share on other sites More sharing options...
Tomo Posted June 28, 2004 Share Posted June 28, 2004 Two things for you to ponder about your LASER display unit: 1) They are very complicated electronic devices - unless you have a full technical manual you will NOT be able to repair it if anything other than a moving part is knackered. If the LASER generator itself is damaged in any way, it is not possible to repair it. 2) As others have mentioned, anything over Class IIa is very dangerous to vision, and Class IIa can cause temporary blindness as well. Unless you know what you're doing, don't mess with them! Link to comment Share on other sites More sharing options...
colinmonk Posted June 28, 2004 Share Posted June 28, 2004 do you know who manufactured the laser system your having problems with? Link to comment Share on other sites More sharing options...
ANDYLASER Posted June 28, 2004 Share Posted June 28, 2004 Please be EXTREEMELY wary of the power supply for gas lasers. A 1 watt argon laser, has a power supply that outputs approx 180v DC at 20 amps. With a large capacitor reservoir. This is enough to do serious damage if you get things wrong. Bigger lasers = more current. If you are unsure leave well alone. The current is generated by a bank of TO3 transistors mounted on a large heat sink, (called the pass bank). There can be between 10 and 50 of these depending on the laser, if you get somthing wrong they blow, all ot them. Looking at £6.50 each to replace. I know.Just re-read your original post, it says you are trying to put the laser back together. Is this refering to the actual laser being in pieces, or the laser itself is complete and you are trying re-assemble scanners, drive card and shutter assemblies around the laser head? Link to comment Share on other sites More sharing options...
24seven Posted June 29, 2004 Author Share Posted June 29, 2004 I do have a licence my recently deceased friend was a partner in the company and we had a company licence and all the other bits of paper etc we needed (three files worth!!). :o I did the training but concentrated on the lights He was the resident expert And I am fully aware of the dangers of lasers Thanks I have seen there power with my own eyes. Should see the state of the ceiling in the warehouse we used to have :P One of the systems that we/I have problems with is a Laser Quatum 500mW yag controlled by a PM20 (as I can run that and my Avo desk) all controlled by a laser point Gavo Control Board . (I would add a pic but don’t know how to ) The problem I have is the PM20 isn’t talking to the control board on the laser I have metered the link cable through all happy but still nothing I know the board is getting power as the galvos are getting power ….any ideas ? ;) If any one wants to see the laser working go to my site in the pics section its on there for a review night I did for Sony Link to comment Share on other sites More sharing options...
IanG Posted June 30, 2004 Share Posted June 30, 2004 I have seen there power with my own eyes. I hope not! :-) Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.