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Making PCB's with a diodelaser

Posted by VDX 
VDX
Re: Making PCB's with a diodelaser
February 17, 2017 01:28PM
... thought, would be good, to share this here too winking smiley

Redeveloped my "intelligent" high-current LD driver for better assembly and controlling options -- the housing will be milled from two halves ... will show it later ...

First try was with Nanite841 controllers:




- fine enough for the common blue 2W- and 3.5W-diodes -- here the curves when pulsing at 1,6 Ampere, what's good for the 2W-diode:





... but seems, the smaller controller was not so a good idea - when switching around 100kHz with pulsed currents of above 2,6 Amperes (needed for the 6W-diodes or the IR-diodes), I've managed to delete the program and even the bootloader inside the Nanite841 !!!


Then tested and changed back to the Wattuino, which seems to be much more robust to EMP effects:




... here it's happy pulsing with 12 Amperes:




Viktor
Re: Making PCB's with a diodelaser
February 19, 2017 05:41AM
Is it an optocoupler you're using to switch the FET?
I guess the negative transient killed the nano.
VDX
Re: Making PCB's with a diodelaser
February 19, 2017 05:52AM
... no, it's the small "transistor-like" MOSFET below the upper big resistor - didn't measure any negtive transients on this line too confused smiley


Viktor
Re: Making PCB's with a diodelaser
February 20, 2017 05:40AM
Quote
brunobasto
Hey @lukie80, keep us posted on your progress. It's looking beautiful. Do you have pictures of your results and printer? Maybe a video?

Thanks. And thanks to VDX for his idea, publishing and support.

So far I only removed the RC paint using nitro diluent. It looks OK although I seem to have some backlash issues. . Next step will be drilling which will show if my PCB alignment was OK.

The printer I use is a cheap Prusa i3 clone with some minor improvements: Geeetech i3 Pro X. The biggest change I made was designing a quick fit carriage system which allows a quick change of tool heads (i.e. print head, laser head, mill head). There you can see the heads I use: Quick Fit Carriage and Laser Head. The precision of my printer is not ideal (see PCB ) and it is not rigid enough for deep or fast milling.
Re: Making PCB's with a diodelaser
February 20, 2017 06:14AM
Quote
lukie80
Quote
brunobasto
Hey @lukie80, keep us posted on your progress. It's looking beautiful. Do you have pictures of your results and printer? Maybe a video?

Thanks. And thanks to VDX for his idea, publishing and support.

So far I only removed the RC paint using nitro diluent. It looks OK although I seem to have some backlash issues. [attachment 90941 etched.jpg]. Next step will be drilling which will show if my PCB alignment was OK.

The printer I use is a cheap Prusa i3 clone with some minor improvements: Geeetech i3 Pro X. The biggest change I made was designing a quick fit carriage system which allows a quick change of tool heads (i.e. print head, laser head, mill head). There you can see the heads I use: Quick Fit Carriage and Laser Head. The precision of my printer is not ideal (see PCB ) and it is not rigid enough for deep or fast milling.

Cool. Thx for the info. Yeah, for drilling I plan to build one of those: Cyclone-PCB-Factory. It maybe ok to drill using a 3d printer, but I don't wanna mess up mine. It's already not rigid enough. I have a modified Printrbot Makers Edition with 200mm x 200mm build area. Plan to build a VORON, but so far I only have the frame assembled.
Attachments:
open | download - frame.jpg (566.1 KB)
Re: Making PCB's with a diodelaser
February 23, 2017 03:18AM
Nice keep it up

I got finally in to PCB with my laser

that firs one I managed to do



Would 2W laser penetrate FR1 Board???

Regards
VDX
Re: Making PCB's with a diodelaser
February 23, 2017 03:54AM
Quote
rastaman46
Would 2W laser penetrate FR1 Board???

... no - not enough absorption and energy density ...


Viktor
VDX
Re: Making PCB's with a diodelaser
March 08, 2017 01:52PM
... my latest (semi-comercial) project is a fiber-laser armed galvo-scanner used for "local ablating" of metal surfaces.

The core project isn't open, but I can show some images and videos of the common parts ...


- for a fast provisoric fixation of the fiber-laser head -- construction of a "3D-LOM-part" in Corel and export as HPGL:




- lasercutting the LOM-slices with the blue diode-module:




- assembled/stacked the slices and inserted holder for the collimator-head:




- mounted galvo-head:




- a video showing some testing on a piece of iron sheet:

[vimeo.com]


Viktor
Re: Making PCB's with a diodelaser
March 23, 2017 05:43AM
Quote
VDX
... yes, I'm using (1:1:1) hydrochloric acid + hydrogen peroxide + distilled water.

Common spray-paints can withstand some minutes until they start eroding ... depends on temperature of the solution ...

For stone and other brittle materials I'll suggest lasercutting thin layers of previously laminated elastic sheets, remove the parts you want to mark and use sandblasting ...

That's a quote of 2013 and I'm curious, if these fluids are still available for the average customer?

Especially hydrogen peroxide is available in different grades, from 2% to ~30% maybe.
What is the type H2O2 you are using?
Same for the acid: Do I need a certain mixture, is it powder of bottled?

THX
Olaf
VDX
Re: Making PCB's with a diodelaser
March 23, 2017 05:57AM
Hi Olaf,

... both around 30% and should be still available, bottled ...


Viktor
VDX
Re: Making PCB's with a diodelaser
March 30, 2017 07:29AM
... tested stripping black paint (development for cleaning metal surfaces):

[vimeo.com]


The result: - on the left a black tile -- on the right the black painted aluminum sheet (Dibond)




Viktor
VDX
Re: Making PCB's with a diodelaser
April 20, 2017 11:08AM
... actually assembling a more "professional" looking marking laser for an exhibition on saturday winking smiley -- will post some more images and videos of the results later on ...








Viktor
VDX
Re: Making PCB's with a diodelaser
April 23, 2017 02:32PM
... a video of the laser-engraver "in action" winking smiley

[vimeo.com]


Viktor
VDX
Re: Making PCB's with a diodelaser
April 25, 2017 03:01PM
... tested to cut 0,3mm thick brass sheets - it's much easier to cut and finer result than with Aluminium!

Here a "mini-elk-bow":





... and the video showing the (pretty slow) cutting - [vimeo.com]


Viktor
VDX
Re: Making PCB's with a diodelaser
May 03, 2017 12:59PM
... the "Aztek Kodex" in metallic coated plastic:




- and in 0,2mm thick steel plate:




Viktor
Re: Making PCB's with a diodelaser
May 03, 2017 11:39PM
That's awesome!
Reminds me a bit of the Pirates of the caribbean coin.




...now make some Krugerrand coins from Brass and see, how realistic they look. winking smiley

Edited 1 time(s). Last edit at 05/03/2017 11:45PM by o_lampe.
VDX
Re: Making PCB's with a diodelaser
May 04, 2017 06:30AM
... for "realistic" coins you'll need a picosecond-pulse-laser with much higher peak energy, what's on my long-term agenda too winking smiley

So it's capable of 3D-engraving in brass and high carbon loaded steel, but need pretty much time ... for this not really suited to make money coins confused smiley


Viktor
VDX
Re: Making PCB's with a diodelaser
May 12, 2017 03:29AM
... did some tests, "engraving" a coin - not exactly what you'll want to make them with spinning smiley sticking its tongue out






Viktor
Re: Making PCB's with a diodelaser
May 13, 2017 12:00AM
Ok, not really convincing..
Maybe etching some print-plates for Monopoly dollar bills is easier? winking smiley
VDX
Re: Making PCB's with a diodelaser
May 13, 2017 06:44AM
... as already said, this isn't an Ultra-Short-Pulse-laser, so not suited for creating optical finishes.

With more time for testing and tweaking the parameters, it could make much better "finishing" results ... but it's not my intention to show, how to counterfeit coins ...


Viktor
VDX
Re: Making PCB's with a diodelaser
August 07, 2017 10:17AM
... again received two broken fiberlasers to extract the IR-diodes from - one is really hefty damaged, the other not so bad:






I'm actually runnig a "DIY-lasermodule-with-driver" project in the German sub-forum and a CNC-forum, which is only meant for local distribution, so no international shipping or such.

But some of the basic info is open, (schematics/layout, sketches, hints), so could be used for other DIY projects too ...

[forums.reprap.org]


Viktor
VDX
Re: Making PCB's with a diodelaser
August 21, 2017 07:18AM
... I've tested PCB-engraving with my marking laser too ...

- engraving:




- first pass - removed the lackuer and some of the copper (so it would be perfect for etching too!):




- after 3 passes most of the copper is removed:




- after 5 passes all the copper and bond (and a thin sheet of ceramic) is stripped:




... and a video showing the first pass and the results - [vimeo.com]


Viktor
VDX
Re: Making PCB's with a diodelaser
September 03, 2017 07:28AM
... to try out the 60Watt fiber laser -- here's another video of the engraving of the "Aztec Codex"center part on a white 100x100mm tile without pre-coating:

[vimeo.com]


When engraving (recorded through a laser protection window):




... and done (still with the dust on it):




Viktor
VDX
Re: Making PCB's with a diodelaser
October 15, 2017 10:09AM
... back to the IR-diodes -- assembled three of the "simple high current drivers", which are meant to drive the 9W-diodes with PWM-pulsing pre-selectable (spike free) currents from 0.6A to 8.4A:



Will cleave and assemble several of the fibercoupled 9W-IR-diodes and one or more of the 25W-diodes in the next days/weeks and make some tests for stability and usability ...


Viktor
VDX
Re: Making PCB's with a diodelaser
October 16, 2017 03:44PM
... and here cleaving, assembling and testing one of the 9watt-IR-diodes:














Viktor
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