Brushless drive ESC

[typhoon_driver]

By all means prove me wrong but there's a good reason that CNC machines have feedback on the axis. It's not that you can't keep good position with a stepper motor, but it's to ensure that if steps are missed or there's backlash, the system can still travel the correct distance. Different application, different motor, same idea.

[Shakey]

By all means prove me wrong but there's a good reason that CNC machines have feedback on the axis. It's not that you can't keep good position with a stepper motor, but it's to ensure that if steps are missed or there's backlash, the system can still travel the correct distance. Different application, different motor, same idea.

You're right different application, different motor. Which is why this doesn't apply. CNC machines keep feedback because they need precision to fractions of a millimeter, a fighting robot does not, no matter how expert a driver your 'precision' does not warrant such control. Back EMF is a perfectly good way of measuring the motor. This isn't some few hundred steps a millimeter stepper motor, this is a brushless that probably has around 10-30 poles. The feedback in a fighting robot is not position tracking but ensuring that the motor RPM and ESC timing match to sustain torque. If you want position tracking in your robot feel free to drive with stepper motors.