A surgical tool for use with a robotic system, the robotic system including a tool drive assembly, wherein the tool drive assembly comprises an interface, the robotic system operatively coupled to a robotic controller that is operable by inputs from an operator, wherein the interface includes at least one rotatable body portion resiliently mounted thereto for coupling a tool mounting portion to the interface, the surgical tool comprising; a tool mounting portion configured to be operably coupled to the interface of the robotic system, the tool mounting portion including a tool mounting plate which supports at least one driven element; a surgical end effector coupled to an elongated shaft assembly, wherein the elongated shaft assembly is attached to the tool mounting portion and defines a longitudinal tool axis; and wherein the surgical end effector includes a staple cartridge, and an anvil pivotally supported for movement relative to the staple cartridge; a cable drive transmission that is operably supported on the tool mounting plate, the cable drive transmission comprising at least one drive pulley that is operably mounted to at least one drive shaft that is attached to the at least one driven element, wherein at least one rotary actuation motion is applied to the drive pulley through the interface between the at least one driven element and the corresponding rotatable body portion of the interface; a closure cable, the closure cable extending through the elongated shaft assembly; said surgical tool being characterized in that it comprises a pre-clamping collar axially moveable relative to the elongated shaft assembly and configured to interact with the anvil; where upon application of a first rotary actuation motion to the drive pulley, the closure cable drives the pre-clamping collar into closing engagement with the anvil to move the anvil to the closed position relative to the staple cartridge, and; where upon application of a second rotary motion to the drive pulley, the closure cable retracts the pre-clamping collar out of engagement with the anvil to permit the anvil to move to an open position relative to the staple cartridge. a tool mounting portion configured to be operably coupled to the interface of the robotic system, the tool mounting portion including a tool mounting plate which supports at least one driven element; a surgical end effector coupled to an elongated shaft assembly, wherein the elongated shaft assembly is attached to the tool mounting portion and defines a longitudinal tool axis; and wherein the surgical end effector includes a staple cartridge, and an anvil pivotally supported for movement relative to the staple cartridge; a cable drive transmission that is operably supported on the tool mounting plate, the cable drive transmission comprising at least one drive pulley that is operably mounted to at least one drive shaft that is attached to the at least one driven element, wherein at least one rotary actuation motion is applied to the drive pulley through the interface between the at least one driven element and the corresponding rotatable body portion of the interface; a closure cable, the closure cable extending through the elongated shaft assembly; said surgical tool being characterized in that it comprises a pre-clamping collar axially moveable relative to the elongated shaft assembly and configured to interact with the anvil;