Got a potential order of 14,000 pieces, which would be really cool...
The pieces are copper-- And I'm finding that my fiber does not play well with copper...
anyone else concur with this?
To wit- I test engraved 3 pieces. Two engraved nice, one was a bit light...
Customer liked, but his customer wants bigger logo.
Pieces are curved, I did several passes on one piece, all resulted in nice dark engraving...
...several passes on second piece and the laser barely touched it even in the precisely focused areas. Even slight out of focus resulted in the dust on the copper being vaporized. Watching it run in these spots, only the red light was visible, the copper was unmarked.
After the second run, I was worried my laser might be the problem. But nope, put the first piece back in and it engraved just like before.
To look at the pieces there's no difference. I tried cleaning with alky, Fantastik, turpentine, nothing changed..
So next up is diamond drag, which for these parts may be fine. I hope, I could use a big order like this...
So I'm curious if this is typical of copper? About 2 weeks ago I tried to engrave the back of a brass nameplate (engravers brass) and the laser would barely touch that too. Brass pocketwatch cases on the other hand, engrave like stainless. Probably the nickel content...