Patent ID: 6337532
Filing Date: 2002-01-08
Classification: H01L,H02N

Abstract:
Method for driving an electromechanical actuator arrangement to move a body in a main motion direction, said method comprising the steps of:driving a first set of drive elements in a four cycle sequence of: gripping said body, moving said body, releasing said body and returning said first set of drive elements to an original position; driving a second set of drive elements in a four cycle sequence of: gripping said body, moving said body, releasing said body and returning said second set of drive elements to an original position; said driving of said second set being phase shifted related to said driving of said first set, said second set being exclusive to said first set, and at least one of the sets is in contact with said body surface at each instant; said gripping sequence of said first set overlaps during a non-negligible transfer period with said releasing sequence of said second set, such that both said first and said second set of drive elements are simultaneously contacting said body, and said gripping sequence of said second set overlaps during a non-negligible transfer period with said releasing sequence of said first set, such that both said first and said second set of drive elements are simultaneously contacting said body; and said driving of said first and second set of drive elements during said gripping sequence includes a significant velocity component in said main motion direction.