Did you adjust this via the lps? Sounds like you did, since it’s a hefty lps for the size of tube.
When you set this, use 50% power and the mA meter to set it at 50% of the current you want. Keeps you from long times with max power when it’s not needed.
22mA seems very low to me. My 50 watt came with a test that showed a max of 21mA. I set my 50% level to 10.5mA. I run mine mostly engraving, but I’ve done my share of cutting at 18mA.
The description indicates a failing tube to be, but I hope not. I’d check the TEM state to ensure you are resonating at TEM0…
A faulty cathode connection can cause issues. Check the HV and but mostly the ground path…
I was mentioning that my 50 watt tube max is 21mA and your 95 watt is 25mA… doesn’t sound right.?
The link I sent you shows the beam, usually from mirror 1 (m1).
Put a target at m1 and make a brown mark, not a hole. In TEM0 state, the beam has a normal Gaussian power distribution, darker in the center, getting lighter as it move outward.
Compare it to the patters in the post and post it here…
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I would think it has to be the lps or tube, assuming good mechanical connections.
Most machines will lase down to about 10% power, but that falls off as they get older, I understand.
Can’t tell anything about the ‘spot’ as it’s way too ‘burnt’… need to pulse lower power so there is just a brown spot. That allows you to see the actual Gaussian power distribution and the resonance.
Odd that there is a ‘non’ burned area on the left. What are you using for a material?
