Its a Addon for the Anycubic i3 MEGA printer.
print it out in flat orientation with support. No scalling needed.
Use some washers beneath the mounting surface and longer screws, mine are like in the photo (the same as already installed but longer).
i used a limit switch from Ebay (https://www.ebay.de/itm/10-Micro-Rollenhebel-Arm-Offnen-Schliesen-Regelschalter-Kw12-3-Pcb-Mikroschalter-/183767703306?hash=item2ac9689f0a)
2 small plastic screws to mount the top plate.
and some wires to connect to the phone.
(Phone has to have a Camera button.
Preparation depends on the phone model and Datasheet/Electric Wireing).
Depending on the program u using (mine is Repetier host) u have to input the following code into settings, under:
Repetier host->Slicer tab-> Configuration-> Printer (Click on the small gear)-> Custom G-code-> Under "After layer change G-code input
G1 G100 X200 Y200;
the number P600 is the time in miliseconds that the Extruderhead stays on the limit switch and the time that the Phone needs to take the photo. Try to increase the delay if photos are not on spot. Also use manual focusing and flash off.
Use an Enclosure/ case/ shell around the printer to eliminate shadows/diferent light levels.
For more info on preparin the Phone camera button, you can contact me, and i will do my best to explain to you the procedure.