The medical industry has long depended on cutting edge technology to provide patients with the best care possible. From Imaging to scanning and robotic surgical devices; the applications for piezoelectric motor technology is broad and the technology is key in providing the best care possible.
To minimize tissue trauma robotic surgery requires very precise movements coupled with great stability. Piezoelectric motors are uniquely suited for such applications. Firstly, they have nanometer level resolution, secondly the self-holding torque (or force) is extremely high often eliminating the need for any break/holding mechanism. At the end effector of the robot compactness is normally critical, DTI’s miniature rotary piezo motor (PM-1124R-HS) and linear piezo motor (LPM-2M) provide a range of useful applications.
Various instruments used in medical scanning (e.g. MRI) are motorized. In order to overcome the strong electromagnetic fields, such motorized devices require heavy lead shielding to protect the motor and or prevent image distortion. Because piezo motors are not effected by EM fields they are uniquely useful for such applications.
The most widely known application of laboratory automation technology is laboratory robotics which comprises many different automated laboratory instruments, devices (the most common being autosamplers) and methodologies used to enable, expedite and increase the efficiency and effectiveness of scientific research in laboratories. Such instruments and devices require fast, accurate movements and are well suited for piezo motor control.
3-Axis Nanomanipulator For Biomedical Research Positioning
The NM3D nanomanipulator is an XYZ positioning system used in microscopy, neuroscience, cellular research, electrophysiology. The NM3D works by converting the rotary motion of an advanced piezoelectric motor (fitted onto each axis of the nanomanipulator) into linear motion. A combination of high torque, variable speed and high angular resolution enables the piezoelectric motor to be used in either continuous or stepper mode. These characteristics facilitate a smooth transition, without degradation in intrinsic performance, from an angular step of less than 5 µrad to continuous motion, and a range of angular velocities, from 5 µrad/sec up to 60 rev/min. This translates into a linear resolution of 0.4 nm and a linear range of velocities from 0.5 nm/sec to 500 µm/sec for each axis of the NM3D. Additional benefits of the NM3D design include the elimination of heat dissipation, the use of non-ferrous and nonmagnetic components, ultra-low electrical noise and low supply voltage (12 VDC), which together make the NM3D ideal for very sensitive applications (e.g. delicate electrophysiological recordings).
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Medical Positioning Systems
The NM3D-25VP is an XYZ nanopositioning system used in stem cell research, IVF and other microscopy based applications. Simple to use, the micropipette is clamped into the universal holder mounted on the side of the NM3D-25VP. The clamp accommodates a range of pipette-holder sizes (3 mm to 15 mm) and can also rotate in a vertical plane (90°). The NM3D-25VP is mounted on a rotary base plate, which enables complete 360° rotation in the horizontal plane. The system is designed to be mounted directly onto the stage of most popular inverted microscopes using a single bracket and standard screws. Control over the Z-axis can also be achieved using the joystick button. This will cause the manipulator to move rapidly within a few seconds to any user-defined ‘Home’ or ‘Work’ position. This feature is ideal in busy labs where multiple routine procedures are conducted throughout the day; allowing the micropipette to be raised from the Work position to the Home position for micropipette changing and then returned back to the Work position with sub-micron positioning accuracy.
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