Method for operating air-setting machine for separation of e.g. coal and mountains, involves selecting control of stroke speed of setting surface such that setting surface moves faster in mid-plane during lowering stroke on setting bed

摘要

The method involves selecting a control of a stroke speed of a setting surface (15) such that the setting surface moves faster in a mid-plane during a lowering stroke on a setting bed, without losing contact with the setting bed for vertically widening the setting bed. The setting surface is moved in synchronism with an upwardly facing surface of the setting bed in a braking phase, where the braking phase includes a braking acceleration that it is selected to be less than the acceleration of gravity.