I show my latest method to make PCB rastering with needle and 3D printer. Also can be used to engraving on other things :)

KICAD

open SVG in GIMP (increase only resolution (3000 or +))

FILTERS MENU > Render > Pattern > Grid

-

Make selection
Crop Selection (must be minus than PCB size)

Open InkScape

drag the bmp
InkScape > Trace Bitmap

No fill and set stroke

MENU > Extensions > Gcodetools > Orientation points

MENU > Extensions > Gcodetools > Tools library

save the file.
select path and:

Force quit when task finish and reopen to make the same for the border
create rectangle
Object to Path
etc...

import file.ngc in Repetier
cd into Repetier directory
./configureFirst
REBOOT
Printer size 220 220 240

Show travel moves
Save SD print file (file.g)

(PCB sprayed with Positiv)