Duck project, laser removing paint from a PCB for chemical etch.
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- Опубликовано: 16 окт 2024
- This particular board is for RFID. The laser cut out the holes and the board edges, but the focus did have to be adjusted in multiple passes to do that.
I have used all kinds of parameters and paints and never managed to remove the paint completely. Once I am finished, there is always a tiny oxide-residue of the paint that stayed on the areas that were supposed to get cleaned (for etching). So, my question for you (unless you are just a camera man, who got amused by the "magic") is what kind of paint (or board for that matter) was used for this nice video? I am sure that we, who experiment with lasers, will find the best laser-engraving settings.
Many Thanks
It was a Krylon green, and etchant was HCL and H202. Maybe wipe with ethanol if you have a film residue left behind.
can you please share the model of the fiber laser ?
how much cost the basic equipment of fiber laser? which wavelenght and power it uses?
About $4000 USD. It doesn't use much power, similar to a computer. 1064nm, rated for 50watt output.
Nice video! What parameters are you using for cutting the holes and edges?
I don't recall the parameters, but it was easy to cut.
brilliant. so much time and waste saved
time wasting
It would be nice to see more of the project.... None of you other videos seem to be related(other than this device will be used for duck related stuff), so itd be cool to see how its finished and implemented.
There's some pictures of the duck treat feeder electronics on my Telegram channel, but I'll see about recording a project from start to finish.
I'm only curious how copper is recycled.
After etching you're left with a solution of copper compounds. With the HCL and H2O2 method you can regenerate the etchant by bubbling air through it. If you want the copper back you can electroplate it out, but unless you're doing millions of boards it wouldn't be cost effective.
Which laser module did you used and its watts rating
Raycus 50W
Are you able to cut holes and cut out the boards themselves if you etch the copper away there first?
The laser can cut through the copper and the board with several passes, no etch step needed for that.
Maintaining focus can be an issue because the height of the laser head is not controllable via the software, so thick pcbs would need a pause and then a height adjustment to cut through.
The next question would be, why not just cut away the copper and leave the pcb? Because the copper is difficult to cut, and then when the laser gets to the pcb it cuts deeply and tends to carbonize it creating a slightly conductive surface. Imperfections will have the copper cut through earlier than other areas.
@@topduk Interesting
Very nice! What kind of laser is that? Is it a fiber laser?
Yes it's a fiber laser. It can cut the board edges and through holes too, but maintaining the focus can be a problem. Sticking to surface mount and using 0 ohm resistors to jump tracks is my preference.
Sir software did you use. What king of g codes are they
KiCAD with export to SVG, then import to laser software.
@@topduk thanks very much, I have working laser head will it perform good. Kind of paint does play any roll. Thanks again a in
Laser can't cut Copper layer?
It can, but stopping the cut consistently in the glass fiber board is the issue. Chemical etch is easier.
Qual modelo dela e onde posso encontrar
what the printer ?
It's not a conventional printer, it's a galvo controlled fiber laser.
@@topduk you can write printer name what printer you use ?
@@topduk what is that?
@@melchoresquer2727 A laser is channeled into a glass fiber and then mirrors controlled by electromagnets reflect the beam towards the material you are cutting.
Shouldn't the image be inverted?
The pads are the PCB and the PCB are the Pads 😅
Why? All the exposed copper will be chemically etched away leaving the traces beneath the green paint. Unless I'm missing something?
That was immediately my thought too, but the copper is just a layer, that'll get etched away by the acid. Otherwise it'd just be a single piece of copper with nothing electrically seperated.
Correct, the paint protects the copper from being etched.
Yo quiero uno como ese !!
Q máquina e está ela e muito boa
Eureka!
quak quack good quack
laser printing