Animatronic eye mechanism for the silicone head of Sylvie 2020. Has full control of each individual eyelid (top and bottom) and eyeball. All my own work.
Uses 4 SG910 servos and 4 HX5010 servos. (Though for the future design I will stick to using high-torque microservos only...)
Servos will need to be stuck to the platform with glue gun.. as I can't think of any other way to reliably rig them. One way to do this would be to have the servo holders printed separately, as they will simply delaminate if you make them part of the platform. (And will also use up a ton of support material that you will have to sand off...)
Eyelids are effectively tied to the plastic hinges with fishing line, as it is simply impractical nor desirable to have screws or bearings poking out of the hinges, as it can get in the way of the silicone. (In future I might experiment with flexible filament eyelids).
The HX5010 servos push and pull the eyelids using one of the plastic rods.
You have long eyelids and short eyelids. One of them goes top and one of them goes bottom... (Pretty sure long ones are top and short ones bottom... I'm struggling to remember!)
This design uses fishing line in order to rotate the eyeballs on the X and Y axis. Eyeballs lock into the gyroscopic rings included in the files, and the gyroscopic ring locks into the hammer-shaped joint on the platform.
I will be simplifying this design by the end of this year so that it is easier to assemble.
Requires fabric in order to successfully bond to silicone skin with SilPoxy. Very tough to rig! (But someone bold enough will figure it out)
Eyeballs are later decorated with resin. One of the biggest causes of the uncanny valley is the lack of a 'magnifying lens effect' in the eye. This is why video characters always look so dumb (presumably because having to render a lens effect in the eyes for every game character would wreck your GPU..)
The eye has to look different from different angles. The human brain evolved to spot these subtle differences to avoid predators. You can't just draw an iris texture on a plastic ball. The iris texture needs to lay flat and then needs to be magnified by a concave lens that you could easily cast out of resin (and to do this you need to ensure that the surface of whatever it is you are molding is also glossy.. otherwise you get cloudy eyes).
(Page under construction...)
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