Five axis direct-drive mini-robot having fifth actuator located

Machine element or mechanism – Control lever and linkage systems – Multiple controlling elements for single controlled element

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74 4903, 74 4904, 901 15, 3185681, G05G 1100

Patent

active

055289550

ABSTRACT:
A substantially balanced, five-axis, direct drive mini-robot provides repeatable micro-manipulation to micron precision. Dynamic forces of each link are nearly decoupled from the dynamic forces of remaining links. The robot is generally formed as a shoulder, arm and wrist assembly. At the shoulder a linear actuator drives the robot in a linear horizontal movement along a first axis (e.g., z axis). Two additional actuators at the shoulder provide revolute motion to rotate the arm in an xz plane (e.g., for lateral motion) and a yz plane (e.g., for vertical motion), respectively. A fourth actuator provides rotational motion to move an end-effector (manipulator) at the wrist through a yaw motion. A fifth actuator, positioned at the shoulder and linked to the wrist, provides rotational motion to move the end-effector through a pitch motion.

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Marbot and Hannaford; "Mini Direct Drive Robot Arm for Biomedical Application," IEEE 1991 ICAR Fifth International Conference on Advanced Robotics, Jun. 19-22, 1991 Italy.
Max and Wallace, "Feedback Control of Miniature Direct Drive Devices," Part of Tutorial M-3, Building and Interfacing Miniature Direct Drive Actuators; May 9, 1994.
Wallaces, Richard S.; "Miniature direct Drive Rotary Actuators II: . . . ," Part of Tutorial M-3, Building and Interfacing Miniature Direct Drive Actuators; May 9, 1994.
Marbot, Pierre-Henry; "Mini Direct Drive Robot for Biomedical Applications;" University of Washington Thesis; Oct., 1991.

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