23’s will rip your machine apart. the 76 oz 17’s we use are only being used at half power. There really should be no reason to upgrade. Look for some other issues. chain has massive backlash, belt is the most efficient way to transfer motion, and is less moving mass. Maybe the drivers you had are not made for this kind of stepper. Double check the specs of the drivers and the steppers.
Reply To: machine gone rogue! (motors at least)