oni305 published a new build:

Read more about this build...

I use a 3Watt 445nm Laser Diode but i've limited the current to a 2.1A which is about 2.5W to increase the lifespan of the laser

and with the trimmer on the board i can regulate the current through the Laser from 1mA to the max 2.1A

Many thanks for the support!
from the other Topic:

I've just finished the algorithm to translate the image to Gcode

Tested with the openbuilds logo

original (with white background):


translate in B/W:


and the attached file "gcode.txt" is the generated gcode (obviously...), is not finished yet (it's only a test), but I'm pretty happy with it

Cool tnx Tweakie.

I've modified the scritpt to scale the image at 10pixel/mm, try this:

Yes i know, but 1 step a time

new with feed 500 & 100 (gcode_feed.txt)

mmmm but I think to have a problem with the individual pixels, can someone try this (singledot.txt)

Theoretically yes, but i can't figure out if GRBL implements G00 and G01 in the same manner ...
I have to make some test with my own board to check it

Every things helps for the test ( especially because at the moment i have dismantled my own laser [because i want to rebuild it with the vslot])

Noted..

Do you think that it's worth an option to change the resolution from 10pix/mm (actual) to 5pix/mm or 1pix/mm ??

Tnx @Robert Hummel , can you try this files:

Great!!
Ok I'll add the option to choose the resolution on the extension.

Now I've edited the script to add M05 & G00 X0 Y0 at the end of the gcode

Any suggestion on other options to add?

Now the extension looks like this:

Thanks!

Inkscape fault (even for backgound color), i've installed the italian version, so the buttons are translated (i don't know why backgound color is translated too...)

Ok, now i can start to write the real extension, merging al the code i'writen so far...

It's working!!
Now I have to make only a few tweaks in the code and it's done!!

So here we are, the release candidate of the extension!!!

Require: Inkscape

Installing: extract the archive and simply copy all the files in the folder "Extensions" of Inkscape

Windows ) "C:\<...>\Inkscape\share\extensions"
Linux ) "/usr/share/inkscape/extensions"
Mac ) "/Applications/Inkscape.app/Contents/Resources/extensions"

for unix (& mac maybe) change the permission on the file:
chmod 755 png.py
chmod 755 raster2laser_gcode.py
chmod 644 raster2laser_gcode.inx

Enjoy,

PS: to run the extension go to: Extension > 305 Engineering > Raster 2 Laser GCode generator

EDIT: removed the file temporally

I hope that you'll enjoy it

just a side note: the extension export the whole inkscape document, so the first thing to do is to change the dimension of the document:

Unfortunately it can't be added, inkscape gives only a few options for the GUI
( http://wiki.inkscape.org/wiki/index.php/INX_Parameters )

Tnx