The motion error produced by direction reversing of the motion. It is presented as a constant hysteresis over the range and is an inherent problem in conventional motion translation mechanisms such as screw/nut, gears, trains and bearings, etc. Normally it is related to machining tolerance, wear, contact stiffness, temperature and loads, etc. nPoint’s flexure motion […]
A positioning or measurement error caused by parasitic rotations when a misalignment exists between the measurement axis and the point of interest. By reducing either parasitic rotations or the offset of misalignment, or both, the abbe error can be minimized. The abbe error can be estimated as: δ = ι * α where δ is […]
A nanopositioner with a high resonant frequency will have a fast step response specification. A nanopositioner with a fast step response specification allows the user to increase the bandwidth of the control loop. A high bandwidth control loop reduces phase delay, which in turn allows the user to scan at an increased rate. Phase delay […]
nPoint offers scanning ranges of up to 400µm in the X and Y axes, 600µm in the X axis, and 400µm in the Z axis. Please visit our Nanopositioning Stages page for a complete listing of scan range options.
Bandwidth is the frequency at which the actual oscillation amplitude is attenuated by -3dB from the commanded oscillation amplitude. This is approximately equal to the frequency at which the actual oscillation amplitude attenuates by 30% from the commanded oscillation amplitude. The bandwidth has to be tested with small driving signal, which guarantees that the attenuation […]
The scanning speed of a stage depends on the resonant frequency of the stage and the control scheme that is employed in the controller. As a general rule, the maximum full-range scanning speed of a stage is approximately equal to one tenth of the resonant frequency. This will prevent destruction of the stage but it […]
Yes, our nanopositioners use high quality multi-layer piezoelectric actuators for movement. nPoint purchases its piezos from the industry leader in multi-layer piezoelectric solutions. Our relationship ensures that the piezos used in our nanopositioners are optimized for our specific product needs.