Focal lens and gas pressure
Focal lens and gas pressure
(OP)
I am using a fiberlaser and I often cut stainless steel.From what I read the focal lens can take hight pressure gas. Nitrogene is used for that. The guys who sold that machine told me always used high pressure with fiberlaser. Example: 11ga at 18bar, 12ga he put 20bar, .250 at 22bar. I have great result with lower pressure. Actually my cut are much better then his. he had a slice or dross mine is like the top of the cut. I cut the gas consumption a lot. My question is; do I dammage my focal lens faster if i use less pressure? I change the focal lens every 2 or 3 months.How long usually the focal lens last?
Thanks
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RE: Focal lens and gas pressure
And probably due to the high absorptivity, too much heat means boiling the material rather than melting...
Does your fiber laser have a lens protection window? If so, i cant see using a lower pressure causing any damage to the lens.
Unless the cut is lost and back reflection occurs... but i would assume the fiber modules detect this and shut down.
RE: Focal lens and gas pressure
Thanks
RE: Focal lens and gas pressure
RE: Focal lens and gas pressure
RE: Focal lens and gas pressure
Today I tought I lost the lens again. It wasn't that. The guy in charge of ordering stuff gave me a couple of protective lens and new nozzles to try. I imagine for saving more and more money for the company. So we are friday and since monday afternoon I install the new protective lens. Well this morning giant burrs suddenly appeared on a thickness I usually have no problems. After different checks everywhere from nozzle to parameters I decide to clean the protective lens. As I undo it I saw the lens yellow. I compare with a new one (which are the real lens I'm suppose to use) and it was clear. I install the new protective lens and bang....perfect cut. I don't know why it become yellow but for sure it masked the power of the focal lens.
Well thanks a lot to all of you people who read and answer. It is the best site I found for learning more and more on laser. You help a lot.
Happy thanksgiving