New milliDelta Robot: Fast Precise Flexible Micromanipulation for Manufacturing and Medicine
Reported in Science Robotics, a new design, the milliDelta robot, developed by Robert Wood’s team at Harvard’s Wyss Institute for Biologically Inspired Engineering and John A. Paulson School of Engineering and Applied Sciences (SEAS) overcomes this miniaturization challenge. By integrating their microfabrication technique with high-performance composite materials that can incorporate flexural joints and bending actuators, the milliDelta can operate with high speed, force, and micrometer precision, which make it compatible with a range of micromanipulation tasks in manufacturing and medicine.
Credit: Wyss Institute at Harvard University.
In 2011, inspired by pop-up books and origami, Wood’s team developed a micro-fabrication approach that enables the assembly of robots from flat sheets of composite materials. Pop-up MEMS (short for “microelectromechanical systems”) manufacturing has since been used for the construction of dynamic centimeter-scale machines that can simply walk away, or, as in the case of the RoboBee, can fly. In their new study, the researchers applied their approach to develop a Delta robot measuring a mere 15 mm-by-15 mm-by-20 mm. Completely unfolded, the milliDelta with 15 mm-by-15 mm-20 mm roughly compares to a cent piece, and uses piezoelectric actuators, and flexural joints in its three arms to control high-frequency movements of a stage on top. Credit: Wyss Institute at Harvard University
“The physics of scaling told us that bringing down the size of Delta robots would increase their speed and acceleration, and pop-up MEMS manufacturing with its ability to use any material or combination of materials seemed an ideal way to attack this problem,” said Wood, who is a Core Faculty member at the Wyss Institute and co-leader of its Bioinspired Robotics platform. Wood is also the Charles River Professor of Engineering and Applied Sciences at SEAS. “This approach also allowed us to rapidly go through a number of iterations that led us to the final milliDelta.”
Credit: Wyss Institute
In addition, the team demonstrated that the milliDelta can operate in a workspace of about seven cubic millimeters and that it can apply forces and exhibit trajectories that, together with its high frequencies, could make it ideal for micromanipulations in industrial pick-and-place processes and microscopic surgeries such as retinal microsurgeries performed on the human eye.
Contacts and sources:
Benjamin Boettner
Wyss Institute at Harvard University.
Source: http://www.ineffableisland.com/2018/01/new-millidelta-robot-fast-precise.html
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