PCB Scanner
This is a proof of concept: use an Anet A8 3D printer to scan a PCB and create a very big image.
Getting started
The main script is anet_scan.py:
$ pip install pygame pyserial
$ python anet_scan.py <serial device path> <width in mm> <height in mm>
...
I advice to move manually the printer's head and position it so that the microscope is at the lower left. The scan is done one columns at times, from the left to the right.
the resulting images are in the shoots/ directory.
Microscope holder
There is a FreeCAD design file named microscope_holder.fcstd for the microscope
holder.
The microscope used is this but anyone would work as well.
Stitching images
This is the hardest part: you could use Hugin or Imagej but with such large number of images it's unreliable; probably in future I will create a script to mount them setting manually the offset between images.