Motor to control needles (like a clock)

Other Hardware Motors, Mechanics, Power and CNC
1

Hi everyone,

I don't know much about Arduino, but I think it could answer to my need. I thus hope you could help me !

I am on a project which requires to have and control some "clocks", that is to say a basic dial and 2 needles. However, the needles should have the same length and be able to move independently. Besides, I would like to be able to control every single needle (their angles).

My project is very similar to the Ham Yard Hotel's clock, made up of 135 clocks :

https://www.humanssince1982.com/a-million-times-135-ham-yard-clock

So the question is : do you have an idea for the adequate material ? (Motor, Arduino card, clock...)
Ideally, the dials would be 5 and 20cm long.

I didn't find anything interesting on Google, but perhaps you could help me.

Thank you very much !

2

Seems the first step for you is to disassemble a clock and see how coaxial shafts are made and how they may be part of your project. The mechanical part of your project is rather complex. Do you have a shop where you can produce the mechanical components?

Paul

3

Had the same issue looking for a twin or dual shaft stepper for you.

Think you would have to use both a hollow rod and a smaller spindle approach.

I would think they did each one with a dual shaft and two small belts to independaNT PULLEY SYSTEM.
A shaft within a shaft so to speak.

Bob.

EDIT

Scaled up clearly.

4

Each dial pointer requires a separate stepper motor. It may be that you can buy the basic mechanism somewhere -- contact the artists behind the Humans Since 1982 project.

Fantastic idea, and works of art!

5

Sounds familiar to another thread. OK found it.

https://forum.arduino.cc/index.php?topic=642900.0

6

Thank you for each of your answers, it's very helpful !

The other topic seems indeed very similar to this one, so I will check it and reply here (or directly there) if I find new elements.

Have a nice day ! =)