Since a couple of days the Fiber is up and running. It already produced some nice QR codes on aluminium and a very nice PCB prototype.
By now I grabed the FR4 I had laying around in the lab. To get to the next level I’m searching for material which can be engraved without harming the operator. Can you recommend any product?
A very nice result. Can you tell us more about the procedure to create such a PCB? Did you use black paint, how many passes to get the spacing between the tracks?
I am thinking of making PCB’s myself, and sorry that I am not able to answer your question.
@hennep this is a galvo fiber laser; they are normally mid-infrared 1064nm and can mark and ablate metal directly.
I’ll document the process as soon as I get it stable enough. 
Using the laser engraver is a nice solution.
I am currently using another option to make my own PCBs. It’s very simple and works very well (down to .2mm inter pins)
http://freedom2000.free.fr/PCB_index_eng.html
It’s a very old project, but still uptodate !
I have used the toner transfer method in the past. It worked well when I printed the designs in the office but when I bought myself a new laser printer it didn’t work anymore. With modern laser printers, or LED printers, the toner is much better bonded to the paper.
You’ll have to tweak the temperature of the laminator around 290°C for the toner to melt and bond on the copper.
And print the PCB on poor quality thin glossy paper.
That’s great, looks super clean.
I’ve tried this and found a couple issues… I’ll point them out and you can tell me how you’ve overcome these.
It works great just peeling off the copper, but the substrate is usually a type of epoxy, which should not be lased because of the gasses produced. It’s very hard to lase off just the copper and not take part of the substrate with it.
Lasing through the substrate to make a hole, not only doesn’t work well, it leaves a mess on my machine and even with good ventilation, stinks to high heaven. Don’t really know what I’m breathing … most of the sites state not to lase the substrate.
There is also a possibility of the substrate being carbonized creating electrical paths that are difficult to find.
I burned two places for alignment pins and a pair of coordinated pins on my CNC3018. After I lased off the copper, I move to my little milling machine and drilled the holes with it.
Lots of work, but does work. Although you still have the issue of digging into the copper deep enough for isolation, but minimally enough to effecting the substrate.
Looking forward to this.
Good luck
