Method and apparatus for determining an inertia of a laundry load in a laundry treating appliance

A method of operating a laundry treating appliance having a rotatable drum at least partially defining a treating chamber for receiving a laundry load for treatment according to at least one cycle of operation, and a motor rotating the drum, the method comprising:

• during an extraction phase of the at least one cycle of operation, accelerating the drum to a final extraction speed without any constant speed phases;
• repeatedly determining the inertia of the laundry load during the acceleration phase;
• and
• determining the final extraction speed based on the inertia of the laundry load.

A laundry treating appliance for treating a laundry load according to at least one cycle of operation the method comprising:

• a rotatable drum at least partially defining a treating chamber;
• a motor rotating the drum according to a motor control signal;
• and
• a controller operably coupled to the motor and providing a motor control signal to rotate the drum according to a speed profile for the at least one cycle of operation, with the speed profile including an acceleration phase where the speed of the drum is accelerated to a final speed, and the controller repeatedly determining the inertia of the laundry load during the acceleration phase, and setting the final speed based on the inertia.