An apparatus and method for reducing displacement of a washing machine having a drum rotatable about an axis of rotation is disclosed. The washing machine comprises a chassis and a motor for rotation a drum. The drum is suspended from the chassis by a suspension. The suspension can comprise springs having six natural frequencies that can resonate at a rotational speed of the drum driven by the motor. The suspension system can be tuned such that resonant frequencies can be varied based upon rotational speed of the drum.

Methods for monitoring load balance in washing machine appliances, and washing machine appliances, are provided. A method includes accelerating rotation of a basket about a central axis within a tub of the washing machine appliance from a first speed to a second speed greater than the first speed. The method further includes detecting a plurality of speed changes during the accelerating step, and summing absolute values of speed differences for each of the plurality of detected speed changes to obtain an unfolded speed value.

Methods for monitoring load balance in washing machine appliances, and washing machine appliances, are provided. A method includes accelerating rotation of a basket about a central axis within a tub of the washing machine appliance from a first speed to a second speed greater than the first speed. The method further includes detecting a plurality of speed changes during the accelerating step, and summing absolute values of speed differences for each of the plurality of detected speed changes to obtain an unfolded speed value.

The present invention relates to a method for controlling a laundry treating apparatus including a first course for rotating washing water and laundry which are loaded in a drum, in a state where a drainage pump is off and a first spinning course for eliminating water elements from the laundry loaded in the drum after the first course, accelerating the drum, wherein the first spinning course comprises a preparing course for rotating the drum, in a state where the drainage pump is off and a drainage course for draining the washing water inside the drum, in a state where the drainage pump is off.

The present invention relates to a method for controlling a laundry treating apparatus including a first course for rotating washing water and laundry which are loaded in a drum, in a state where a drainage pump is off and a first spinning course for eliminating water elements from the laundry loaded in the drum after the first course, accelerating the drum, wherein the first spinning course comprises a preparing course for rotating the drum, in a state where the drainage pump is off and a drainage course for draining the washing water inside the drum, in a state where the drainage pump is off.

A laundry treating apparatus includes a cabinet, a tub provided inside the cabinet, a drum rotatably provided inside the tub to accommodate laundry, a motor directly connected to a rotation shaft of the drum, and a controller configured to control the driving of the motor according to any one of a plurality of preset drum driving motions. The controller controls the rotation of the motor to receive a physical force greater than a static frictional force acting between the laundry and the drum from an inner surface of the drum during a process in which the laundry falls to be in contact with a portion of the drum when a first motion of the plurality of drum driving motions is selected.

A dewatering machine including: a dewatering tank, formed in a cylindrical shape with a central axis extending in a direction inclined relative to an up-down direction; a balancing ring coaxially arranged in the dewatering tank, liquid for achieving rotational balance of the dewatering tank is contained in the balancing ring and flows freely; a control part. The control part causes the dewatering tank to rotate at a rotating speed lower than a lowest rotating speed at which the dewatering tank resonates in a dewatering preparation stage of washings, so as to detect a biased position of the washings, causes the dewatering tank to stop rotating immediately before the washings biased in the dewatering tank are positioned at an opposite side of liquid biased downward in the balancing rings to a lower side, relative to the central axis.

A dewatering machine including: a dewatering tank, formed in a cylindrical shape with a central axis extending in a direction inclined relative to an up-down direction; a balancing ring coaxially arranged in the dewatering tank, liquid for achieving rotational balance of the dewatering tank is contained in the balancing ring and flows freely; a control part. The control part causes the dewatering tank to rotate at a rotating speed lower than a lowest rotating speed at which the dewatering tank resonates in a dewatering preparation stage of washings, so as to detect a biased position of the washings, causes the dewatering tank to stop rotating immediately before the washings biased in the dewatering tank are positioned at an opposite side of liquid biased downward in the balancing rings to a lower side, relative to the central axis.

Disclosed herein are a washing machine with a balancer to counterbalance unbalanced load produced during rotation of a drum and a control method thereof. The washing machine having a balancer to counterbalance unbalanced load produced during rotation of the drum seats a mass in a groove in the balancer before rotation of the drum possibly producing unbalance as in the spin-drying cycle begins, thereby efficiently maintaining balance of the drum. Accordingly, vibration in the drum may be reduced and product liability incident due to touch of the frame may be prevented.

A washing machine may include a drum rotationally arranged for containing laundry, a motion detector configured to detect a motion of the laundry, and a controller configured to control rotation speed of the drum based on the detected motion such that the laundry shows a predetermined motion.