Brand: Renishaw | Category: Nanotechnology
The RSU10 accepts a 1 Vpp sine and cosine signal from an RLE system, interpolates by 16,384 and delivers a position reading through a USB port. That interpolation gives signal resolution down to 9.64 picometres at a velocity of 1 m/s. Measurement data works with Renishaw's established LaserXL and QuickViewXL calibration software, which suits users who need to view and analyse real time dynamic measurement data. A software development kit with a maximum update rate of 20 Hz is supplied with each unit, and a TPin trigger input lets data capture begin on receipt of an externally generated signal.
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Air temperature, air pressure and relative humidity all shift the wavelength of light from a laser interferometer, and the XC-80 compensator corrects for that automatically. Its intelligent sensors process readings at source, and the compensator uses them to convert the nominal laser wavelength into a true value against which the interferometer read-out is adjusted, with no user intervention needed. Updates can happen automatically every seven seconds, shown by LED status lights, and the integral USB connection supplies power so no separate PC interface or power supply is required. Up to three material temperature sensors can be attached so linear measurements are normalised to a standard material temperature of 20 °C, and the standard 5 m sensor cables are detachable and can be screwed together for longer machines.
The RPI30 accepts differential analogue 1 Vpp sine and cosine signals, interpolates by 4096 and provides an output in parallel format with up to 36 bits of position data. Used with a double pass plane mirror interferometer system, whose sinusoid fundamental period is nominally 158 nm, this yields a least significant bit of 38.6 picometres at velocities up to 2 m/s. Active lissajous correction can be enabled to compensate for DC offset and AC mismatch coming from the laser encoder, improving the sub divisional error to ±0.1 nm at low velocities. Two axis position and status are carried over an LVTTL (3.0 V) compatible bus, and a diagnostics connection allows remote download and analysis.
A laser interferometer for measuring and calibrating motion systems, machine tools and coordinate measuring machines. It measures linear, angular, rotary, straightness and squareness errors directly, giving traceable data that can be used to set machine compensation.