A rotational servomotor could be used to directly drive a conveyor at a continuous or variable speed, for example ... to all motion controllers power and control wiring for the motion controller, the ...

[Cameron] has been hard at work at a low cost, closed-loop controller for the robotics community that will take a conventional BLDC airplane motor and transform it into a high end servo motor.

instead of a speed control signal whose actual effect is subject to variances like motor voltage level. The “Position” mode has the motor function like a servo with adjustable torque ...