RGH45 encoder system. Data sheet L A. Uses RTLR40 and RTLR40-S highaccuracy. steel tape scale. Unique filtering optics and DC light servo

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1 L A Renishaw s RGH readhead offers all the benefits of the market proven RG linear encoder system highspeed, noncontact performance with filtering optics to guarantee reliable performance over dirt, contamination and scratches. The RGH readhead is designed for use with Renishaw s highaccuracy stainless steel RTLR0 tape scale. Enclosed within a rugged diecast housing, the readhead uses proven solid state components to give outstanding reliability. Dual limit switch sensing is also included as standard to provide dedicated signals for each endofaxis indication, together with a repeatable reference mark (datum). Installation is quick and easy to achieve thanks to generous readhead setup tolerances and a rapid scale installation technique that uses the motion of the axis to lay the scale, which is then locked to the substrate via a single clamp fixed with Loctite. Renishaw s unique setup LED indicates when optimum conditions have been achieved, removing the need for complicated oscilloscopes or setup equipment. RGH is available with selfadhesive RTLR0S tape scale or RTLR0 with Renishaw s unique FASTRACK track system that allows easy scale replacement ideal for long machines that need to be sectioned for transit. Both scale types feature highaccuracy graduations marked directly onto stainless steel, without any coatings, providing immunity to damage from harsh solvents. These added benefits give RGH readheads greater flexibility, making them ideal for use in a variety of applications including linear motors, FPD manufacturing, electronics assembly and test, printing machines and a variety of highspeed motion control systems. Digital range RGHT µm resolution RGHD µm resolution RGHG 2 µm resolution RGHX 1 µm resolution RGHN 0. µm resolution RGHW 0.2 µm resolution RGHY 0.1 µm resolution Analogue range RGHA 1 Vpp differential Uses RTLR0 and RTLR0S highaccuracy stainless steel tape scale Unique filtering optics and DC light servo Large installation tolerances Excellent dirt immunity High speed operation up to m/s Industry standard digital and analogue output options Resolutions from µm to 0.1 µm Integral reference and dual limit sensors Integral setup LED

2 RGH installation drawing (on RTLR0S scale) Dimensions and tolerances in mm Scale and optical centreline >R0 Dynamic bend radius >R Static bend radius 6 min 2 mounting holes M3 x 9. deep Reference mark sensor position Arrow indicates forward direction of readhead relative to scale (Yaw tol. ±1 ) Optical centreline 1 Reference mark actuator (A931020) A Q Limit switch actuator 8.6 * ± ± Detail A P limit switch actuator Mount dimple down (Dimensions same as Q limit) (A931021) 2 mounting holes M3 x 7. deep P limit switch sensor position A Q limit switch sensor position Q limit switch actuator Mount dimple up (A931021) 0. FASTRACK 38 thickness 3 2 (Pitch Ø. ±0.2 tol. ±1 ) 0.8 (Pitch tol. ±1 ) = 2.2 = Rideheight 0.8 ±0.1 Rideheight 0.6 ±0.1 from K top surface Arrow indicates optical and reference mark centreline *Extent of mounting faces. = Dimensions from substrate. NOTE: For detailed installation drawings refer to the relevant installation guide. (Roll tol. ±1 ) = 2.2 = = 7. Setup LED * 19 Detail A Datum clamp (A980028)

3 General specifications Power supply V ±% RGHA <160 ma RGHT, D, G, X <12 ma RGHN, W, Y <160 ma Ripple <200 frequency up to 00 khz. NOTE: Current consumption figures refer to unterminated readheads. For digital outputs, a further 2 ma per channel pair (eg A, A) will be drawn when terminated with 120 Ω. For analogue outputs, a further 20 ma in total will be drawn when terminated with 120 Ω. Power from a V dc supply complying with the requirements for SELV of standard EN (IEC) Temperature Storage 20 C to 70 C Operating 0 C to C Humidity Sealing Rated up to 0 C, 9% relative humidity (noncondensing) IP0 Acceleration Nonoperating 00 m/s 2 BS EN :1993 Shock Operating 00 m/s 2, 11 ms, ½ sine BS EN :2009 Vibration Operating 0 m/s 2 Hz to 2000 Hz BS EN :1996 Mass Readhead 0 g Cable 38 g/m EMC compliance BS EN : 2006 Environmental Cable Compliant with EU Directive 2011/6/EU (RoHS) 12 core, double shielded, outside diameter. ±0.2 mm Flex life >20 x 6 cycles at 0 mm bend radius Connector options Code Connector type Readhead variant D 1 pin Dtype plug RGHT, D, G, X, N, W, Y L 1 pin Dtype plug RGHA Speed performance Clocked output readheads The RGHN, W, Y readheads are available with a variety of different clocked outputs. The clocked options have been designed to prevent fine edge separations being missed by receiving electronics utilising slower clock speeds. Depending on the clock frequency chosen, each option has a different maximum speed and associated minimum receiver clock frequency. Head type T D G X N, W, Y option N Maximum speed (m/s) W Digital readheads Y Minimum receiver clock frequency (MHz) Encoder velocity (m/s) Resolution (µm) 20 x safety factor Analogue type RGHA Characteristic applies to RTLR0 tape scale 0 Signal amplitude (%) 1 Frequency (khz) m/s

4 Output signals RGHA 1Vpp analogue Function Signal Colour 1 pin Dtype (L) Power V Brown Brown (link) White White (link) Red 9 Incremental signals V 1 Blue Yellow 1 V 2 Green 2 Reference mark V 0 Violet Grey 3 11 Reference mark unidirectional operation* BID DIR Black Orange 6 1 Limit switch V p V q Clear Pink 7 8 Shield Inner Outer Green/Yellow 1 Case 1 pin Dtype plug (termination code L) *Reference mark unidirectional operation The RGH reference mark output is not repeatable in both directions. Certain controllers will flag an error when they detect different reference mark positions in the forward and reverse directions. BID/DIR pins allow the readhead to be configured to ignore the reference pulse output in one direction (see installation guide for more information on reference mark setup). BID/DIR connections BID/DIR connection For bidirectional operation (normal) To: Reference mark output direction BID DIR For unidirectional operation V or not connected Do not connect Forward and reverse BID DIR DIR V or not connected Forward or reverse Forward only Reverse only

5 Output signals (continued) RGHT, D, G, X, N, W, Y RS22A digital Function Signal Colour 1 pin Dtype (D) Power V Brown Brown (link) White White (link) Incremental signals A B Green Yellow Blue Red Reference mark Z Violet Grey 12 Limit switch P Q Black Pink 11 Alarm* E Orange 3 External setup X Clear 1 Shield Inner Outer Green/Yellow 1 Case * NOTE: Alarm channel E (option 0) or line driver 3state (option 06) 1 pin Dtype plug (termination code D)

6 Electrical connections Grounding and shielding RGH Inner shield Extension cable* Customer electronics V Output signals Outer shield *Maximum extension cable length: RGHA 0 m, RGHT, D, G, X, N, W, Y 20 m IMPORTANT: The outer shield should be connected to the machine earth (Field Ground). The inner shield should be connected to. Care should be taken to ensure that the inner and outer shields are insulated from each other. If the inner and outer shields are connected together, this will cause a short between and earth, which could cause electrical noise issues. Recommended signal termination Digital outputs RGHT, D, G, X, N, W, Y Analogue output RGHA Readhead A B Z Customer electronics V 0 V 1 V 2 120R Cable Z 0 = 120R 120R V 0 V 1 V 2 A B Z Single ended alarm signal termination (Option 0) V k7 Customer electronics Limit output V to 2 V V p V q P Q R = 1k8 = Select R so that the maximum current does E k7 0 0nF not exceed 20 ma. Alternatively, use a relay or optoisolator.

7 Output specifications Digital output signals RGHT, D, G, X, N, W, Y Form square wave differential line driver to EIA RS22A (except limit switch P, Q, Alarm E and external setup signal X) Incremental = 2 channels A and B in quadrature (90 phase shifted) Analogue output signals RGHA Incremental 2 channels V 1 and V 2 differential sinusoids in quadrature (90 phase shifted) Signal period P Resolution S Model RGHT RGHD RGHG RGHX P (µm) S (µm) 2 1 (V 1 ) (V 1 ) 90 0 µm Vpp with green LED indication and 120R termination when signal is differentially received RGHN (V 2 ) (V 2 ) A B RGHW RGHY Reference = Reference Z Synchronised pulse Z, duration as resolution S. Repeatability of position (unidirectional) maintained within ±20 C from temperature at time of phasing and for speeds <0. m/s. For RGHN, W, Y only Z pulse resynchronised at powerup with any one of the quadrature states (00, 01, 11, ). (V 0 ) (V 0 ) to 1.2 Vpp Differential pulse V 0 18 to 8. Duration 126 (electrical). Repeatability of position (unidirectional) maintained within ± C from temperature at time of phasing and for speeds <0. m/s Limit open collector output, asynchronous pulse Limit open collector output, asynchronous pulse Repeatability <0.1 mm typical Repeatability <0.1 mm typical P Q V p V q Length of actuating magnet Length of actuating magnet Alarm single ended line driver output E For RGHT, D, G, X alarm asserted for signal amplitude <1%. Either asynchronous pulse E as shown (option 0) or line driver channels 3state (option 06) 20 ms minimum For RGHN, W, Y alarm E asserted when: Signal amplitude >10% Readhead exceeds specified maximum speed Also, outputs are 3stated at signal amplitude <1% Setup (nom) Voltage at X 0 0 0% signal level 70% 0% Between 0% and 70% signal level, X is a duty cycle. Time spent at V increases with signal level. At >70% signal level X is nominal V. = Inverse signals not shown for clarity

8 Readhead part numbers RGH A 1 L 00 L Scale type L = Renishaw RTLR 0 μm tape scale Options 00 = Analogue 1 Vpp (RGHA only) 0 = Digital, single ended alarm signal (RGHT, D, G and X only) 06 = Digital, 3state alarm signal (RGHT D, G, and X only) 61 = 20 MHz receiver clock (RGHN, W and Y only) 62 = MHz receiver clock (RGHN, W and Y only) 63 = MHz receiver clock (RGHN, W and Y only) Termination D = 1 pin Dtype plug (RGHT, D, G, X, N, W, and Y only) L = 1 pin Dtype plug (RGHA only) Cable length 0 = 0. m 30 = 3 m = 1 m 0 = m 1 = 1. m Output Analogue A = 1 Vpp Digital T = μm N = 0. μm D = μm W = 0.2 μm G = 2 μm Y = 0.1 μm X = 1 μm Readhead series NOTE: Not all combinations are valid. Check valid options online at RGH compatible products RGH RTLR0S Installation guide M Data sheet L91793 RTLR0 and FASTRACK Installation guide M Data sheet L91793 For worldwide contact details, please visit our main website at RENISHAW HAS MADE CONSIDERABLE EFFORTS TO ENSURE THE CONTENT OF THIS DOCUMENT IS CORRECT AT THE DATE OF PUBLICATION BUT MAKES NO WARRANTIES OR REPRESENTATIONS REGARDING THE CONTENT. RENISHAW EXCLUDES LIABILITY, HOWSOEVER ARISING, FOR ANY INACCURACIES IN THIS DOCUMENT. RENISHAW and the probe symbol used in the RENISHAW logo are registered trade marks of Renishaw plc in the United Kingdom and other countries. apply innovation and names and designations of other Renishaw products and technologies are trade marks of Renishaw plc or its subsidiaries. Loctite is a registered trademark of the Henkel Corporation Renishaw plc All rights reserved Issued 0213 *L *