[Pierke]

Hi all,

I've got a really weird problem with my laser tube.
At a certain value on the mA meter the laser is actually lasering
(See video: https://youtu.be/Luo7nPPR1G0)

When I change the value of the potentiometer to adjust the laser output than no actual beam is comming out of the tube.
Inside the tube I see the beam building (purple beam) but it doesn't come out of the tube.
I've tried with a piece of paper between the tube and the first mirror.
(See video: https://youtu.be/jmNyCu5M8-E)

My laser is a 1200mm long 60watt glass tube, water cooled.

Does anyone have an idea of whats happening, what is the issue and/or how to solve this?

Many Thanks!

Pierke

[KH0UJ]

Try sanding the contact posts and the HV clips on the glass tube with a 240 grit sand paper to have a fresh contacts, and test it again if it works in some cases it`s loosing power due to carbon build up on the contact points

If I can just see your video maybe I can relate on the problem, but im not seeing it, it says access forbidden

[robwiacek]

Did you solve this problem?
I'm trying to buy one, same issue.
Rob


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[KH0UJ]

if you already sanded the HV contacts there`s a test switch on the power supply on it. try pressing that if it fires, that switch will fire the tube @ 100%, try that first to eliminate software issues (machine parameters) if it still does`nt then I guess your tube is worn out, if you dont know how to refill it then I guess you need to replace it

[robwiacek]

I'll give it a shot.
But I'd like to buy it on the cheap so if I fix it for the guy it goes up to 2K. Too much for me.
Thanks for your help


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