So for the timelapse:
I add a small dummy piece in one corner in the back (red arrow)
So after each layer on the main part, the head has to go to the back for the layer on the dummy one.
When it gets there, the magnets attached to the main arm (yellow arrow) pass in front of a magnetic switch.
It send a signal to a microcontroller (blue arrow).
The microcontroller then use an infrared LED (green arrow) to tell the camera to take a picture (kind of like a TV remote).
I did the first few tests changing the camera battery every hour as the camera has to stay on to not lose focus… but when doing 12 hours prints it becomes painful, so I found a adapter to keep it plugged straight to the wall …
To epoxy the motor, i used resin research epoxy, same as for my surfboards.
On the rotor side, I used a piece of acrylic tube that fits right inside as I had it on hand, but any sheet of plastic stiff enough to make a “wall” to cast the resin in the gaps between the magnets should be good. I also used some clay to close the bottom.
on the stator side, i brushed the epoxy on the winding, used liquid tape on the leads to keep some flexibility and some adhesive lined shrink tubing.
@Vicdes2 wrote a clean guide: google doc