Low torque steppers Nema 14

[m_c]

How much precision are we talking?
I'm only guessing this isn't something where you need to be back in the same position within seconds of angular rotation...

In all honesty, given it's only a Nema 14 motor, the voltage isn't going to be that great, and the amount of generated electrical noise isn't going to be that great either.

If rotational drift is a concern, then you could implement a position reset whenever the opto gets triggered.

[Desertboy]

How much precision are we talking?
I'm only guessing this isn't something where you need to be back in the same position within seconds of angular rotation...

In all honesty, given it's only a Nema 14 motor, the voltage isn't going to be that great, and the amount of generated electrical noise isn't going to be that great either.

If rotational drift is a concern, then you could implement a position reset whenever the opto gets triggered.

0.1mm will be fine

The rotational speed is very low <0.5RPM at maximum, geared 4.5:1 to give me 900 steps per revolution

I planned to check the position every rotation to see if it's drifting because why not?

I figured Opto sensor are touchless and probably the easiest solution to add something that rotates neatly,I can hide out of sight

An inductive sensor would look out place