Stepping motors are another type of motor that is used in robots. It have a narrower range of torque output than servo motors and are more suitable for the cylindrical coordinate and gantry robots where the torque requirements are more uniform over the range of arm movement. Stepping motors move in response to pulses sent by the controller, each pulsing causing a small amount of motor movement, called a step. Because the controller counts and sends the appropriate number of steps to each motor, there is no need for an encoder to provide motor position information back to the controller. Controllers for stepping motor robots are simpler than for servo motors, resulting in reduced cost and controller complexity.