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For my case, we now confirmed that the gas resonator is leaking, very tiny holes leak, and enough to pass leak test. Need 7 bar of N2 soak in a distill water to see leak. 6 bar no bubble!! Considering microweld to seal the leak. Now I understand the symptoms. White crystal is dried coolant...

Noted. For my case, we now confirmed that the gas resonator is leaking, very tiny holes leak, and enough to pass leak test. Need 7 bar of N2 soak in a distill water to see leak. 6 bar no bubble!! Considering microweld to seal the leak. Thanks

Hmm...So you think I should not assume there is a leak ? More of why there are tiny white crystal ? What could cause the crystal ? Derek

thread380-311289 Hi I like to ask if you manage to solve the problem ? Sounds very similar to mine ?

Anyone go idea how to find the leak? We do have a microweld machine to dot and seal the leak. But with 6 bar compressed air, and soak distill water, we don't see bubble. Any suggestion how to find leak?

Thought of leak, welding... The surprise is we put 6 bar into the cooler, soak the gas cooler in distill water, we did not see any bubble!!! Even more surprising the gas cooler I installed in a working machine shows no leak, but power drops....and inspection later shows a fine white crystal...

thread380-311289 We have a trumpf tc600L with 1500watt laser We have tried to get a reconditioned laser up. Leak test passed, can get laser power up at 1.5K. But power drops very quickly over 2 mins to less than 800watt. Everything we restart and gas replaced, we get 1.5Kwatt and drop again...

Can someone recommend me where I can buy reconditioned or new gas cooler for the Trumpf Resonator? We suspect the gas cooler is the root cause of our 1.5kwatt laser loss of power. We actually move one of the gas cooler to a working machine and we see the power starts to drop very fast after...