Transform a Servo into stepper?

Hi,
I'm wondering if it is possible to transform, with mecanisms like in watchmaking, a sigle servo into a stepper.
When the servo turns left, a crank will turn of a fixed amount of degree in the clockwise direction.
When the servo turns right, a crank will turn of a fixed amount of degree in the anti-clockwise direction.

The main advantage of this is that we can have a stepper motor created with a servo.

I'm searching such projects without results... Am I the first one to think about this ?

How can I imagine such a mecanical project ?

Thank you

rickharris24 days ago

ANY electric motor can be made into a stepper You simply need some mechanism to count rotations of the motor and to control it.

An RC servo is going to be VERY small to work with.

This video and several others from the same man show how this can be done with a fair amount of precision.

janolap1 (author)  rickharris24 days ago
Thank you for this answer, I already know homofaciens' work... Really interesting.

But, I imagine something more "mechanical" like this schema...
rect5693.png

This is easily done using a solenoid (you could use a motor) to pull a gear wheel round. As in a clockwork mechanism.

I don't see exactly what you want to do as an end point perhaps it would help if you explain more.

sol.jpg
janolap1 (author)  rickharris23 days ago

Thank you for this answer.

(as english is not my native language, I try to explain as precisely as I can).

Here is my wish, simplified :

- I have a wheel, or a crank, or whatever that I want to turn step by step, in the 2 directions.

- I have 1 servo motor which can turn either left, either right, before returnin to it's zero position (not a continuous turning servomotor).

- I would like, when I activate the servo to turn right, that the wheel turns right to, but just one step. Then the servo returns to its zero position, and the wheel stays in this new position. When I activate the servo to turn left, the wheel turns left to, but just one
step. Then the servo returns to its zero position, and the wheel stays
in this new position.

To sum up :

When I turn the servo right, the wheel goes one step right.

When I turn the servo right two times, the wheel goes 2 steps right.

And the same when I turn the servo left...

Cordially

Jean