- /***
- * This method allows you to set the voltage of the motor. The range of
- * voltage is from [-1, 1]. A negative voltage makes the motor run backwards.
- *
- * @param voltage
- * The voltage of the motors that control the rollers. The range of
- * these motors go from [-1,1]. A negative voltage makes the motor
- * run
- * backwards.
- */
-
- public void setRollerVoltage(double voltage) {
-