The 3D-printed robot hand can grasp objects.

"Researchers have designed a low-cost, energy-efficient robotic hand that can grasp a range of objects – and not drop them – using just the movement of its wrist and the feeling in its ‘skin’. Credit: University of Cambridge" (Scitecdaily.com/Researchers Have Designed a 3D-Printed Robotic Hand That Can Grasp a Range of Objects)

There are many ways in which robot hands can touch objects. The simplest way is to fill the elastic surface of that hand by using tiny cylinders which are small pistons. When those pistons are moving backward, they transform the elastic surface into a sucker. Another way is to keep the piston's other side open. Tnd the rubber sealant will close air in that piston.

The accuracy of that pressure-based system depends on the size and how many cylinders and pistons the system uses. There is also a possibility that the elastic surface will equip with independently operating ventilates that allow using one pressure chamber. And then that system can adjust the pulling effect by opening and closing those ventilates.

When a robot touches something, it requires information about the distance of the object and the shape of the object. It can take that information from the sensors like the sonar system or laser-scanner that is in its hand. That thing allows the robot to estimate how it can touch objects. If the robot has moving fingers. It might have a piezo-electric system. That measures how strong the robot's hand compression is. In the most complicated version the robot can have a tiny X-ray machine in its fingers that measure that robot would not destroy the target that it touches.

Robots that have similar hands to humans are interesting tools. If the robot hand acts similar way as the human hand. That allows the robot to use similar tools that human uses. If the worker uses a long manipulator hand with similar touch to a human that allows the worker to operate in cramped places. The hand can be the manipulator with multiple joints. And that allows the operator can put it in complicated places. That kind of manipulator can use the same tools as humans. And that makes it more flexible.

In space technology 3D printed robots and robot hands are making it possible to send probes outside the solar systems. Those robots can fix problems in probes. And 3D printing technology allows the system to recycle that robot. That means when the robot has done its mission. The system melts it again. And that allows the system to use those materials for other purposes. The 3D-printing technology makes systems more flexible and that opens new paths for space technology.

https://scitechdaily.com/researchers-have-designed-a-3d-printed-robotic-hand-that-can-grasp-a-range-of-objects/

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