L-8003-2438 Data sheet RLD 90 detector head For the fiber optic laser encoder Renishaw's RLE fiber optic laser encoder uses interferometry to provide high resolution, high linearity position feedback. The RLE comprises of the RLU laser unit and a range of RLD detector heads. This data sheet describes the 90 RLD detector head. The detector head is the core of the optical measuring system containing the interferometer, reference optics, fringe detector, laser shutter and beam steerer. To complete the interferometer configuration, only one additional optic is required in either plane mirror or retroreflector based configurations. For easy installation, the integral rotary beam steerer allows final adjustments to be made to optimise the beam alignment after the head has been secured. The head dissipates negligible power and is designed to be thermally stable. Two versions of the RLD 90 head are available, one for use in a plane mirror interferometer (PMI) and one for use with a retroreflector interferometer (RRI). The fiber optic cable can be disconnected from the detector unit and the electrical cable can be disconnected from the laser head, thus allowing each to be pulled through small cable tracks and ducting. The detector head incorporates a safety interlock that cuts power to the laser if either the fiber or electrical cable are disconnected. Laser beam shutter General outline and dimensions 98 (3.86) 380.2 (1.5 0.008) Cable 50 (1.97) Overall dimensions of the laser head: Height: 31.5 (1.24) Length: 98 (3.86) Width: 50 (1.97) 27 (1.06) Fixing: 4 off M3 x 0.5 x 35 mm or 5-40-UNC x 13/8 cap head screws on a 38 mm square pitch. Fiber coupling 13.5 (0.53) 4 off fixing screws 380.2 (1.50.008) Laser beam indicator Return beam Output beam 13.5 (0.53) The RLD 90 detector head can be mounted on either top or bottom faces providing 90 or 270 laser output from the same unit. 19 (0.75) 31.5 (1.24) Dimensions in mm (inches) 7 (0.28) Legislative - Laser safety: Labelling CE and FCC Aperture identification warning label with the wording, "Avoid exposure The RLD 90 detector head is supplied from a 633nm class II laser laser radiation emitted from aperture". A Class II laser product source emitting <1 mW. It incorporates a laser beam shutter and laser identification label is also applied to conform to both EN60825-1 and beam on indicator, thus conforming to the relevant sections of 21CFR1040 legislation. EN60825-1and EN60825-2 The fiber optic coupling in the head has an interlock, so if the fiber or electrical cable is withdrawn, power to the laser tube is disconnected. CAUTION LASER RADIATION - DO NOT STARE INTO BEAM MAXIMUM OUTPUT 1mW CONTINUOUS, 632.8 nm CLASS II LASER PRODUCT Renishaw plc Old Town, Wotton-under-Edge, Gloucestershire GL12 7DW United Kingdom T +44 (0) 1453 844302 F +44 (0) 1453 844236 E laser.products@renishaw.com www.renishaw.com RLD 90 detector head operating parameters Axis travel PMI 0- 1m RRI 0 -4m Linearity PMI RRI <5 nm <10 nm Accuracy (uncompensated) 0.02 % Accounts for environmental effects including altitude up to 1500 m and a cosine error up to 1 mm /100 mm Zero point drift 100 nm/C Measured by mounting mirror and detector close together on a zerodur base and changing the temperature Beam diameter 3 mm Beam separation 7 mm Center to center Beam alignment adjustment 1 pitch 2 yaw Integrated beam steering to simplify beam alignment Beam alignment tolerance for plane mirror 50 arcseconds Tolerance applies to both pitch and yaw during operation Cable length (standard) 3m Permanent attachment to the detector head and 15 pin D type connector at the laser Cable diameter 6.5 mm Terminated with a 15 way D type connector Fiber diameter (armoured) 5 mm Removable from the interferometer head (connector 12mm Dia.) Cable and fiber bend radii 25 mm static Cable and fiber bend radii 50 mm dynamic Component weight 0.25 Kg Laser beam alignment: RLD identification and ordering The RLD 90detector head incorporates a beam steerer to simplify the alignment process on installation. Prior to installation, ensure that the alignment groves are horizontal and that both locking screws are loose, as shown in Figure 1. Align the head on the 4 mounting screws by securing one of the two nearest the aperture and rotate (yaw) the detector head until the maximum signal strength is achieved. To then increase the signal strength to its optimum, rotate the beam steerer using the key, as shown in Figure 1 to adjust the pitch. Finally, tighten the locking screw on the top side and 4 fixing screws. The RLD is normally supplied with the appropriate RLU laser unit as a configured RLE10 fiber optic laser encoder system. For full details of available RLE10 system configurations consult a Renishaw representative. For special applications or spares requirements the RLD is available separately, the generic form RLD detector head part number is shown below: Type Cable length Optics Fixing screws Key Beam Dia Series Part Number Figure 1 RLD 10 A3 Angle P9 For details of available RLD options consult a Renishaw representative . Renishaw reserves the right to change specifications without notice. Locking screws Renishaw offices worldwide Australia Renishaw Oceania Pty Ltd, Melbourne T +61 3 9521 0922 F +61 3 9521 0932 E australia@renishaw.com Brazil Renishaw Latino Americana Ltda, Sao Paulo T +55 11 4195 2866 F +55 11 4195 1641 E brazil@renishaw.com The People's Republic of China Renishaw Representative Office, Beijing T +86 10 6410 7993 F +86 10 6410 7992 E china@renishaw.com Renishaw Representative Office, Shanghai T +86 21 6353 4897/5697 F +86 21 6353 4881 E china@renishaw.com (c) 2001 Renishaw France Renishaw S.A., Marne la Vallee T +33 1 64 61 84 84 F +33 1 64 61 65 26 E france@renishaw.com Germany Renishaw GmbH, Pliezhausen T +49 7127 9810 F +49 7127 88237 E germany@renishaw.com Hong Kong Renishaw (Hong Kong) Ltd, Kowloon Bay T +852 2753 0638 F +852 2756 8786 E hongkong@renishaw.com India Renishaw Metrology Systems Pvt Ltd, Bangalore T +91 80 5320 144 F +91 80 5320 140 E india@renishaw.com Indonesia Renishaw Representative Office, Jakarta T +62 21 428 70153 F +62 21 424 3934 E indonesia@renishaw.com Singapore Renishaw Representative Office T +65 897 5466 F +65 897 5467 E singapore@renishaw.com Italy Renishaw S.p.A., Torino T +39 011 966 10 52 F +39 011 966 40 83 E italy@renishaw.com Slovenia RLS merilna tehnika d.o.o. Ljubljana T +386 1 52 72 100 F +386 1 52 72 129 E mail@ris.si Japan Renishaw K.K., Tokyo T +81 3 5332 6021 F +81 3 5332 6025 E japan@renishaw.com South Korea Renishaw Liaison Office, Seoul T +82 2 565 6878 F +82 2 565 6879 E southkorea@renishaw.com Renishaw K.K., Nagoya T +81 52 733 1321 F +81 52 733 7705 E japan@renishaw.com Spain Renishaw Iberica S.A., Barcelona T +34 93 478 21 31 F +34 93 478 16 08 E spain@renishaw.com The Netherlands Renishaw International B.V., Prinsenbeek T +31 76 543 11 00 F +31 76 543 11 09 E benelux@renishaw.com Taiwan Renishaw Representative Office Taichung City T +886 4 251 3665 F +886 4 251 3621 E taiwan@renishaw.com UK (Head Office) Renishaw plc, Gloucestershire T +44 1453 524524 F +44 1453 524901 E uk@renishaw.com USA Renishaw Inc., Hoffman Estates, IL T +1 847 286 9953 F +1 847 286 9974 E usa@renishaw.com For all other countries T +44 1453 524524 F +44 1453 524901 E international@renishaw.com Switzerland Renishaw A.G., Pfaffikon T +41 55 415 50 60 F +41 55 415 50 69 E switzerland@renishaw.com Printed in England 1101 (V3) Part No. L-8003-2438