Laundry treatment machine

A laundry treatment machine comprising:

• a wash tub;
• a pulsator rotatably provided inside the wash tub;
• a motor to rotate at least one of the wash tub and the pulsator;
• at least one clutch to selectively transmit torque of the motor to at least one of the wash tub and the pulsator;
• a motor driver to control driving of the motor;
• a clutch driver to control driving of the at least one clutch;
• and
• a controller electrically connected to the motor driver to control the motor driver and the clutch driver to control the clutch driver,
• wherein the controller is configured to control the motor to repeat rotation and braking in a first direction a first number of times during a first period after a position of the at least one clutch is selected,
• wherein the controller controls the motor to repeat rotation and braking in a second direction a second number of times during a second period, subsequent to the first period,
• wherein a magnitude of a rotational speed and rotational angle are successively reduced when the motor is rotated and braked in the first direction during the first period, and a magnitude of a rotational speed and rotational angle are successively reduced when the motor is rotated and braked in the second direction during the second period, and
• wherein changing the speed of the motor from speed in the first direction to speed in the second direction is performed without stopping the motor between the first period and the second period,
• wherein during a third period subsequent to the second period, the controller is configured to increase the rotational speed of the motor to a first speed, to sustain the first speed, and to decrease the rotational speed of the motor from the first speed to a second speed in order to sense amount of fabric in the wash tub,
• wherein the first speed of the third period is greater than the rotational speed during the first period and the second period.