Brand: Renishaw | Category: Nanotechnology
The RLI20-P links a Renishaw laser encoder system to a Panasonic MINAS A5 series controller. It takes the 1 Vpp analogue quadrature signals from the laser encoder and passes them through a high speed interpolator before outputting an incremental position reading in RS485 format. The internal position update rate is 100 MHz and the sub divisional error contribution is quoted as ±0.5 nm.
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Contact Vvon Technologies Limited about Renishaw equipment requirements in Bangladesh.
Phone: +880 1711-738207 | Email: info@vvon.com.bd
Renishaw's RLU laser units bring the performance of a displacement interferometer together with the installation ease normally associated with tape and glass scale encoders. Supplied in single or dual axis form, an RLU contains a class 2 helium neon (HeNe) laser source, stabilisation electronics, a fibre optic launch and axis position feedback electronics, and it is combined with one or two RLD detector heads to make up an RLE system. The RLU10 holds laser frequency stability within ±50 ppb over any one hour period, which suits the majority of in air applications, while the RLU20 holds ±2 ppb over the same period for the majority of vacuum applications. Both units support velocities up to 2 m/s and a vacuum wavelength stability of ±0.1 ppm over three years.
Every RLE laser interferometer encoder system is built from an RLU laser unit together with one or two RLD10 detector heads, chosen to suit the application. The detector head is the core of the optical measuring system and holds the interferometer optics, a unique multichannel fringe detection system and beam steering mechanisms. Renishaw offers three interferometer configurations, RLD10 plane mirror, RLD10 retroreflector and RLD10 differential, plus an RLD10 with no internal interferometer. Beam output orientation is chosen for each axis, except on the differential interferometer head.
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.