Abstract: A compliance mechanism for holding a robotic finishing tool implements passive force control and compliance using one or more double-acting pneumatic pistons. A desired application force is set and maintained by controlling pneumatic pressure in chambers both fore and aft of the one or more double-acting pneumatic pistons. The pressures in the fore and aft chambers are dynamically controlled, e.g., in response to changes in spatial orientation of the robot arm and tool, to maintain a desired compliance force applied by the robotic finishing tool to a workpiece. An external regulator maintains the fore and aft chamber pressures, for a given spatial orientation, throughout the holder's range of compliance motion. The compliance mechanism includes a plurality of piston bores; the number of active pistons may be adjusted for a given operation, e.g., in response to the finishing tool weight.

Abstract: A linkage assembly to connect a tool to a robotic device. The linkage assembly includes a body and a first linkage pair with first and second links that are configured to be connected to a first section of the tool. The linkage assembly also includes a second linkage pair that includes first and second links that are configured to be connected to a second section of the tool. The first linkage pair are powered to provide a force to move the tool relative to the body. The second linkage pair supports the tool and moves with the first linkage pair. Each of the first and second linkage pairs are pivotally connected to the body and may maintain parallel positioning during the movement.

Abstract: A linkage assembly to connect a tool to a robotic device. The linkage assembly includes a body and a first linkage pair with first and second links that are configured to be connected to a first section of the tool. The linkage assembly also includes a second linkage pair that includes first and second links that are configured to be connected to a second section of the tool. The first linkage pair are powered to provide a force to move the tool relative to the body. The second linkage pair supports the tool and moves with the first linkage pair. Each of the first and second linkage pairs are pivotally connected to the body and may maintain parallel positioning during the movement.

Abstract: A compliance mechanism for holding a robotic finishing tool implements passive force control and compliance using one or more double-acting pneumatic pistons. A desired application force is set and maintained by controlling pneumatic pressure in chambers both fore and aft of the one or more double-acting pneumatic pistons. The pressures in the fore and aft chambers are dynamically controlled, e.g., in response to changes in spatial orientation of the robot arm and tool, to maintain a desired compliance force applied by the robotic finishing tool to a workpiece. An external regulator maintains the fore and aft chamber pressures, for a given spatial orientation, throughout the holder's range of compliance motion. The compliance mechanism includes a plurality of piston bores; the number of active pistons may be adjusted for a given operation, e.g., in response to the finishing tool weight.