Custom Pulley Help - ATC over hall

[JAZZCNC]

What i wanted to say was that a stepper with a gear could do the job.

Yes I know that but it's needs a High Ratio and decent sized stepper to handle the inertia of large diamter wheel fully loaded with tools and they do struggle if run fast resulting in overshooting. Which actually slows tool changing or If toolholder isn't perfectly lined up they rub and wear spindle/Pullstud resulting in dropped tools.!!

Geneva while still needs gearbox or ratio it does index perfctly and is more reliable. That's why they are used in ATC.!!