I have a question. I purchased a 50W co2 tube and its firing a broken(non complete oval with no burn spots near the middle of the oval) beam. I put a piece of wood near the opening of the laser that aims towards the mirror 1. When I look at the internal mirror in the tube, furthest away from mirror …

the new light object tube is a dream compared to what I was warring with on that TEM01 business. Thank you again for all of the insight and being a huge help in getting my system back up and running. Keeping an even more(if that possible) critical eye on temperature just to be safe and make sure thi…

Can you show us a picture of what you are describing? [image] kwbphoto: When I look at the internal mirror in the tube, furthest away from mirror 1, as its firing, I can see little, what I can only describe as charred spots light up on the internal mirror when I hit the test button. Is this nor…

[burn] top is 10% power for 1 sec bottom is 99% 1 sec right out of the tube, beam hasn’t hit the mirror yet

internal mirror not firing [internal m 2]

internal mirror while firing [internal m1]

With the tube compartment opened and ppe using an iPhone XR

Hello. I think you have the same problem as i have. The tube. When the power is at around 13% it does an oval mark. If i rase at around 40% it split the beam. [IMG_20200623_112536] [IMG_20200623_112456] [IMG_20200623_113018]

I see what you mean when you say your beam is split. Mine is coming out hollow for the most part. Slightly different issue but maybe they have some of the same root causes. Have you found a solution to it yet or still looking?

Solution is a new tube. This one dont have more that 50 hours but because of covid i didnt use the laser for more than 2 months so i cannot ask about any warranty. The problem in my case i think are the inside mirrors from laser. In your case i think the tube has gone TEM01 mode. Something like this…

Thank you all for the assistance and helping to diagnose the issue. I went ahead and ordered a new 45W from lightobject last night out of frustration. Glad I did. Are there any other reputable sellers out there who you like to purchase from that don’t sell cheap tubes such as the one I previously …

K40 internal mirror problem?

Lasers

mcdanlj (Michael K Johnson) June 25, 2020, 10:58pm 10

You can find other examples of discussion here about TEM01 mode that might be helpful for confirming the diagnosis:

https://forum.makerforums.info/search?q=tem01

Here’s a recent example:

Getting a split beam out of the laser tube