- Apr 15, 2022
Yea the divergence is quite aggressive, you could be losing some of your output at the edges, you'll find out when you test with a G2 lens.
I also tested in the block before extraction with the factory gang lens and got a low reading, like 4W, then I cleaned the gang lens with a Zeiss wipe and all the power was there, 6.5W, it's amazing how much loss there is from just touching a lens with our hands and I like to keep my hands clean, still it makes a big difference.
One more question regarding these nubm47's
So I got one installed on a laser engraving machine. Nothing special, its a run of the mill generics that was advertised as being 2.5W and was only outputting 1.2W and blew at 2.1W.
I turned the trimmer up on the PCB and was feeding the new 47 LD IIRC 5.2A. It was running fine, then poof! I got a single 30 second run out of it. Even added sufficient cooling for it,
Pulled it apart and its the diode thats blown, not the driver.
So my question, what should I set the LD current to? Im assuming that the TTL blanking and max current was just too much stress.
Anybody have experience with this?