Indesit WIB111 vibrates excessively on a spin It is level and is not overloaded. Sometimes the powder drawer vibrates out and the machine moves up to a foot!!

It sounds as if one or more of the drum supports, which are springs or shock absorbers, have become detached or are in some way damaged. You would need to take the back and top off the machine to check this. Otherwise you will have to call a service engineer.

Alternatively, if this is a brand new machine, the reason is that the transportation fixings have not been removed. These are typically two or more steel rods that hold the drum in place, and have to be removed when the machine is installed, and before it is used, If they are not removed there is no damping of vibration as the drum is not free to move on its flexible supports.