Here is my turntable design. Included are the stl's and the original scad design that can be used for generation of new stl's. Also included is the schematic for the controller that translates a turntable position command to a series of steps for the motor. Note the electronics design is specific for my own track electronics but can be used as a basis for something new.

Since the electronics are based on a AVR Mega 8 I also included C code that implements the movements.

For using the stl also look into the scad design. Also note the stl's are included in the tar file.

Some tips:

Install all the wires first before gluing the 2 bottom parts of the bridge together you would not be able to do that later!

When driving in the M3x30 screw to hold the bridge it is wise to first make a small 20mm plastic tab with a dull point (from some 2.85 filament) to drive the wires to the out side. With this tab installed place the bridge and screw it tight. While getting the screw in it will remove the tab. I didn't do that and I created a short in the wires with the screw so it took me a evening of additional work and smoke from the house due to a blown led.

I have used some putty to remove some of the 0.1 layers in the bottom of the turntable pit. But I was not able to remove it completely probably due to my lack of putty/sanding skills.

Also published the latest files on github so for the latest update look on github:

https://github.com/Zoev89/Draaischijf