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November 2010 Angle Encoders with Integral Bearing 2 Information on Absolute Angle Encoders with Optimized • Scanning Angle Encoders without Integral Bearing• Rotary Encoders• Encoders for Servo Drives• Exposed Linear Encoders• Linear Encoders for Numerically • Controlled Machine Tools Interface Electronics• HEIDENHAIN controls• is available on request as well as on the Internet at www.heidenhain.de. This catalog supersedes all previous editions, which thereby become invalid. The basis for ordering from HEIDENHAIN is always the catalog edition valid when the contract is made. Standards (ISO, EN, etc.) apply only where explicitly stated in the catalog. Angle encoders with integral bearing and integrated stator coupling Angle encoders with integral bearing for separate shaft coupling Contents Overview HEIDENHAIN Angle Encoders 4 Selection GuideAbsolute Angle Encoders with Integral Bearing 6 Incremental Angle Encoders with Integral Bearing 8 Angle Encoders and Modular Encoders without Integral Bearing 10 Technical Features and Mounting Information Measuring principles Measuring Standard, Measuring Principles 12 Scanning the Measuring Standard 14 Measuring accuracy 16 Mechanical Design Types and Mounting 18 General Mechanical Information 22 Specifi cations Series or ModelSystem Accuracy Angle encoders with integral bearing and integrated stator coupling RCN 200 Series 5“/ 2.5“ 24 RON 200 Series 5“/ 2.5“ 26 RON 785 2“ 28 RCN 700/RCN 800 Series 2“/ 1“ 60 mm 30 100 mm 32 RON 786 RON 886/RPN 886 2“ 1“ 34 RON 905 0.4“ 36 Angle encoders with integral bearing for separate shaft coupling ROD 200 Series 5“ 38 ROD 780 ROD 880 2“ 1“ 40 Electrical connection Interfaces and Pin Layouts Incremental signals 1 VPP 42 TTL 44 Absolute position valuesEnDat 46 Fanuc and Mitsubishi 48 HEIDENHAIN Measuring Equipment 49 Cables and Connecting Elements 50 General Electrical Information 54 Evaluation Electronics 58 4 HEIDENHAIN Angle Encoders The term angle encoder is typically used to describe encoders that have an accuracy of better than 5" and a line count above 10 000. In contrast, rotary encoders are encoders that typically have an accuracy better than 10“ . Angle encoders are found in applications requiring precision angular measurement to accuracies within several arc seconds. Examples: Rotary tables on machine tools• Swivel heads on machine tools• C-axes of lathes• Measuring machines for gears• Printing units of printing machines• Spectrometers• Telescopes• etc. The tables on the following pages list different types of angle encoders to suit various applications and meet different requirements. The RCN 729 angle encoder mounted on the rotary table of a machine tool RCN 729 incremental angle encoder Rotary table RCN 729 Angle encoders can have one of the following mechanical designs: Angle encoders with integral bearing, hollow shaft and integrated stator coupling Because of the design and mounting of the stator coupling, it must absorb only that torque caused by friction in the bearing during angular acceleration of the shaft. RCN, RON and RPN angle encoders therefore provide excellent dynamic performance. With an integrated stator coupling, the stated system accuracy also includes deviations from the shaft coupling. Other advantages: Compact size for limited installation • space Hollow shaft diameters up to 100 mm • to provide space for power lines, etc. Simple installation• Selection Guide For Absolute Angle Encoders see pages 6/7 For Incremental Angle Encoders see pages 8/9 5 Angle encoders with integral bearing, for separate shaft coupling ROD angle encoders with solid shaft are particularly suited to applications where higher shaft speeds and larger mounting tolerances are required. The shaft couplings allow axial tolerances of 1 mm. Selection Guide on pages 8/9 Angle encoders without integral bearing The ERP and ERA angle encoders without integral bearing (modular angle encoders) are intended for integration in machine elements or apparatuses. They are designed to meet the following requirements: Large hollow shaft diameters (up to 10 m • with a scale tape) High shaft speeds up to 20 000 min• –1 No additional starting torque from • shaft seals Segment angles• Selection Guide on pages 10/11 ROD 880 incremental angle encoder with K 16 fl at coupling ERA 4000 incremental angle encoder Overview You can fi nd more detailed information on HEIDENHAIN modular angle encoders on the Internet at www.heidenhain.de or in our brochure Angle Encoders without Integral Bearing. 6 Selection Guide Absolute Angle Encoders with Integral Bearing SeriesOverall dimensions in mm System accuracy Recommended measuring step1) Mechanically permissible speed Incremental signals Signal periods/ revolution With integrated stator coupling RCN 200 5“0.000 13 000 min–1 1 VPP16 384 –– –– –– 2.5。