Summary

These are the ears from my animatronic mini head which fit onto the eye's I uploaded last year. The base plate has room for four servo's. The front two are for optional eye brows en the back two are for rotating. The up/down motion is made by servo's below the eye as can be seen in the video.

All the parts where printed in ABS and treated with an acetone vapour bath to make everything very smooth. After the vapour bath all holes were drilled to the correct size because the ABS would deform a little during the process. Please note that some parts require extra sanding to make all parts fit.

This is a list of all the hardware I used to made a pair of ears:
Please note some things can be made diffently and lenghts can vary in your design.

4X MG90S mini servo
12x MF63zz ball bearing
20x M2 nut
4x M3 nut
2x M3 lock nut
24x M2x12 screw
16x M2x5 screw
2x M3x16 screw
6x M3x12 screw sunk head
2x M3x5mm hex spacer FF
4x M2x10mm hex spacer FF
2x M3x5mm hex spacer MF
2x Ball and roller link 3.9x2x16mm (230060x10)
2x 15x2mm rod (old bicycle spoke)
2x 35x2mm rod with treat (old bicycle spoke)
2x 45x2mm rod bended(look at pictures closely because this part can rotate freely when ears move up and down.
8x cable shoe with 2mm hole

The plate where the up/down servo's are mounted on is not included!

I used cable shoes which I modified a bit for the connecting rods but this is not an exact science. You can used other ways like Pushrod Linkage Stoppers or Ball connectors. I just didn’t have enough of these parts so I used the cable shoes.

I uploaded only one side.
To make both ears you simply need to mirror all the parts execpt the base plate of course.

The sandwich plates are there because it wasn’t as solid as I hoped. There was a little bit of flex between two modules. So I made two plates out of 3mm acrylic. This made it very solid.

I made a short video to demonstrate the head.

https://www.youtube.com/watch?v=92OUb4uLUhk

Here the link to the eye module:

https://www.thingiverse.com/thing:2668124

All servo’s are controlled by a 32ch servo controller running a script on my laptop and sending commands to the controller over USB. These controllers are widely available on Ebay and other sites.

I'd like to see your applications and extension for this.