This print is for a mechanical iris with a open ID of 110mm and a overall OD of 180mm minus mounting lugs. Files include cad drawings in FreeCad 0.19, STLs, PursaSlicer 2.4.1 3mf files, and pre sliced gcode for a i3 MK3. 

If you re slice note the petals were designed for a 0.1mm layer height and a 0.4mm nozzle.

All the other parts can be printed at a 0.2mm layer height and 0.4mm nozzle.

Infill was 15% for all parts and no supports. 

The pegs are set up to accept a #12 (imperial) nut. Note they like to break off if you force things. I used a die to partial thread the pegs to use normal nuts. A “speed nut” would be a better choice for this assembly but did not have any on hand. 

When stacking the petals I got better results when stacked as shown.