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Data sheet: REE series digital interpolators

Data sheet: REE series digital interpolators
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Data sheet: REE series digital interpolators - 1

REE series digital interpolators The REE digital series of interpolators is designed to accompany the RG2 (20 µm) and RG4 (40 µm) encoder systems by offering a wide range of interpolation factors. Industry standard 1 Vpp differential input analogue signals are interpolated to industry standard RS-422A digital quadrature output signals. These interpolators can be used with any standard 1Vpp differential output encoder system to enable easy integration with industry standard digital controller inputs. When interfaced with 40 µm pitch systems such as the RGH34, RGH40 and RGH41, the interpolators give resolutions down to 10 nm. When used with 20 µm pitch systems such as the RGH22, RGH24 and RGH20, the interpolators will resolve down to 5 nm. The REE interpolators are fully RoHS compliant and feature user selectable AGC (Auto Gain Control) that is operational at all speeds. These interpolators are capable of operational speeds of over 3 m/s at 100 nm resolution from a 20 µm encoder signal period. The REE interpolators feature a tri-coloured setup LED indicating incremental signal strength. This allows ease of setup for optimum performance. A proportional external setup signal and calibration cycle also help to simplify installation. The REE interpolators have a low cyclic error – less than 50 nm from 20 µm signal period at low speed. This is achieved by active offset, balance and gain control which is operational, when selected, at all speeds. Using 20 µm scale REE0004 - 5 µm resolution REE0020 - 1 µm resolution REE0040 - 0.5 µm resolution REE0100 - 0.2 µm resolution REE0200 - 0.1 µm resolution REE0400 - 50 nm resolution REE1000 - 20 nm resolution REE2000 - 10 nm resolution • Tri-colour integral set-up LED • Compatible with all standard 1Vpp analogue output readheads • Industry standard RS422A output • Interpolation factors from x4 to x4000 • Binary interpolation factors from x4 to x4096 available on request. • User selectable automatic gain control (AGC) • Automatic offset and balance control (AOC and ABC) REE0004 - 10 µm resolution REE0020 - 2 µm resolution REE0040 - 1 µm resolution REE0100 - 0.4 µm resolution REE0200 - 0.2 µm resolution REE0400 - 0.1 µm resolution REE1000 - 40 nm resolution REE2000 - 20 nm resolution REE4000 - 10 nm resolution

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Data sheet: REE series digital interpolators - 2

Data sheet REE digital series interpolators Optional mounting brackets (A-9539-2018) Note: Remove washers when installing brackets Input 15 way D type socket Calibrate button Output 15 way D type plug Operating and electrical specifications Power supply 5V -5% +10% Ripple 130 mA current consumption (interface only). The interface will be fully active <300 ms after power is applied. Provision is given for remote sensing via two cores of the customers cable. NOTE: Current consumption figures refer to unterminated interfaces. A further 25 mA per channel pair (eg A+, A-) will be drawn when...

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Data sheet: REE series digital interpolators - 3

REE interpolator features Self-tuning active correction The REE interpolator corrects for input signal imperfections to optimise system accuracy. Corrections are made for the following: Automatic Offset Control (AOC) – adjusts offset independently for the sine and cosine signals Automatic Gain Control (AGC) – ensures consistent 1 Vpp signal amplitude Automatic Balance Control (ABC) – adjusts the gain to equalise the sine and cosine signals These correction mechanisms operate over the full working speed range of the readhead. The user can disable/enable the AGC by pressing the calibrate...

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Data sheet: REE series digital interpolators - 4

Data sheet REE digital series interpolators Input signals REE interpolators are designed to be used with industry standard 1 Vpp readheads. Cos (V1 ), Sin (V2 ) and reference mark (V0 ) differential input signals should have nominal signal amplitude of 1 Vpp developed across 120R input termination resistor. One or two open collector limit switch signals, active high or active low can also be input. 15 way ‘D’ type socket Pin number Signal name First (Q) limit switch Reference mark-ve Not connected Setup signal/second (P) limit switch on dual limit readheads Do not connect Cable’s inner...

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Data sheet: REE series digital interpolators - 5

Output specifications Form - Square wave differential line driver to EIA RS422A (except open collector limit and external set-up signal X) Incremental 2 channels A and B in quadrature (90° phase shifted) Signal period signal level Setup signal voltage proportional to signal amplitude Synchronised pulse Z, duration as resolution Alarm Asynchronous pulse >20 ms *Wide reference (option C) Synchronised pulse Z, duration as signal period Repeatability of position (uni-directional) is determined by the readhead specification. NOTE: The set-up LED on the REE interpolator cannot be used for...

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Data sheet: REE series digital interpolators - 6

Renishaw plc New Mills, Wotton-under-Edge, Gloucestershire GL12 8JR United Kingdom Interpolator part numbers The REE interpolator conforms to the relevant harmonised European standards for electromagnetic compatibility as detailed below. A Options A - Dual limit switch B - Single limit switch C - Wide reference mark Patents Features of Renishaw’s encoder systems and similar products are the subjects of the following patents and patent applications: US4959542 EP0383901 EP0388453 EP0514081 EP0543513 EP0748436 US6051971 US6481115 JP2003-512,611 CN1585685 US2005-0079499 EP1469969 EP1552251...

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Data sheet: REE series digital interpolators 6Pages

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Data sheet: REE series digital interpolators
6Pages