I just received my 3W laser from china and I am hoping someone out there can help me with the focusing. Every time I think that I have it close, I start the job and it barely makes a dent at 100% power. As you can see from the attachment there is this larger blue circle around the center burn area.
The other strange issue is that when focusing the beam you can nudge the side of the lense (it is slightly wobbly) and the focus dot changes resolution. Sometimes tighter focus, sometimes worse.
Anyone run into any issues like these before?