Low torque steppers Nema 14

[m_c]

It would depend on if you're extending the stepper motor wiring, or the control signals to the motor.

To the drive, you might get some lost/additional steps, but I'm going to guess you don't need that precise a position, so probably won't be that much of a problem.
To the motor, worst issue would potentially be the stepper wiring causing noise in the opto sensor, causing false triggers when you're trying to home, however a bit extra load on the opto with a suitable resistor would soon solve that.

[Desertboy]

It would depend on if you're extending the stepper motor wiring, or the control signals to the motor.

To the drive, you might get some lost/additional steps, but I'm going to guess you don't need that precise a position, so probably won't be that much of a problem.
To the motor, worst issue would potentially be the stepper wiring causing noise in the opto sensor, causing false triggers when you're trying to home, however a bit extra load on the opto with a suitable resistor would soon solve that.

I do need the precision

It's Pi powered

I need to know where I am in the rotation at all time that's why I included a home, in case of power cut it also logs it's last position to the SDcard so it can auto recover on power up

We extend CNC to 2m all the time on routers with no issues so there must be a way

End stops I was going to use RF cable for although given it rotates there is no end....

I bought 4 core 0.5mm CY cable will use it for both stepper and end stop and ground them

So will see what happens

I know it's overkill for the end stop but I got 10m's of it so might as well use it