April 7, 2022
Physik Instrumente (PI) has announced it has added a new model to its family of compact hexapod six-axis stages based on the Stewart Platform principle. The H-840.G2IHP micropositioning robot is equipped with brushless precision motors for high-performance and high-duty cycle applications.
Designed for multi-axis alignment and positioning applications in fields such as optics, photonics, aerospace, and bio-engineering, the hexapod micro-robotic stage provides six degrees of freedom, step resolution of 20 nanometers, repeatability to +/- 0.1 micrometers, 40kg load capacity and travel ranges to 100 mm (linear) and 60 degrees (rotation). PI said the six degrees of freedom means the robot can provide linear motion in X, Y, and Z directions, as well as rotations in Theta-X, Theta-Y and Theta-Z (pitch, yawl and roll).
PI said examples of hexapod six-stage applications can be found in optics and tool inspection, bio-medical and life sciences, micromanufacturing and micromanipulation, and industrial alignment of precision components.
“The advantage of the Stewart Platform parallel kinematic design over traditional five-axis and six-axis stages is the fact that there is only one moving platform, supported by six closed-loop actuators,” said PI. “This parallel operation also provides identical dynamics for all six axes, in contrast to traditional multi-axis stacked-stages, where each stage sees a different load, and the motor on the bottom stage has to move the mass of its own motion platform as well as up to five additional stages stacked on top.” The design symmetry of the hexapod also enables a large central aperture and eliminates the need for dragged cables, as there are only two stationary external connections for power and data going to the fixed bottom platform.
With its design featuring long-life brushless motors, low friction ball-screw actuators and ultra-stiff cardanic joints, the H-840 is also ideal for automated industrial precision alignment applications. The six-axis motion controller with built-in multi-axis alignment routines and several software examples and drivers also reduces startup time and facilitates integration into existing control structures, PI said.
Interested customers can download a datasheet on the H-840.G2IHP Hexapod 6-Axis Robotic Stage here.