Exposed Linear Encoder Compact Model Range

Transcription

1 we set the standards LIK 41 Exposed Linear Encoder Compact Model Range

2 Exposed Linear Encoder; compact model range Features Extremly small dimensions of scanning head for crowded installation conditions High resolution and accuracy High interpolation accuracy due to electronic signal control Signal processing in the 15pin D-sub connector Integrated signal interpolation up to 100x in the connector Wide mounting tolerances Simple mounting of the scale tapes because of double-side adhesive tapes Defined thermal behaviour of the DOUBLEFLEXscale tape Mechanical decoupled DOUBLEFLEX-scale tape Dynamic offset and amplitude control Incorrect mounting Contaminated scale tape Scanning signal before offset and amplitude correction signal position Contamination and mounting errors lead to interferences in the optical scanning of the scale tape by the scanning head and so to periodic deformations of the sinusoidal counting track signals. These deformations manifest themselves as: offset deviations and amplitude deviations, as well as amplitude differences between the sine and cosine channel and lead to interpolation errors, which determines noise and heat in direct drives. Scanning signal after offset and amplitude correction The signals generated by the measuring module are automatically corrected within the sensor without following error over the entire velocity range. This measure not only increases the accuracy, but also the reliability of the encoder. 2

3 Dimensions and installation conditions Ø 3.7 M / ± 0.05* * without using reference mark: 0.6 ± 0.1 mm 0.05 F F 1.5 ± /8 11 F... Direction of guideway Allocation of scanning head, scale tape and measuring length MT 10; DOUBLEFLEX with label MT 11; SINGLEFLEX with label TL =ML + 18 mm TL =ML + 14 mm + + counting direction 3 7 (5.8) ML 12.2 (5.8) ML 8.2 TL = ML TL = ML bonding pad MT 15; SINGLEFLEX minimal ML; without label MT 26 Glass; minimal ML; without label TL =ML + 11 mm TL =ML + 6 mm (5.3) ML (2.8) ML TL = ML+11 TL = ML ML... Measuring length TL... Total length 3

4 Ordering key for scanning head Designation example scanning head: LIK L T Z Type of sensor 4 Sensor with one scanning field; SV3-R Grating period - 20 µm Interface - output signals C K L M I N P Frequency/Edge separation X sinusoidal signal 1 V pp RS 422 square wave signal without interpolation RS 422 square wave signal with interpolation 5x RS 422 square wave signal with interpolation 10x RS 422 square wave signal with interpolation 25x RS 422 square wave signal with interpolation 50x RS 422 square wave signal with interpolation 100x distinguishing mark for clock frequency of counter on request (only valid for versions with interpolation) 1 supplied with surcharge Z R S T P V W U 1 - standard Connector type 15pin D-sub; Signal processing in the connector (RS 422, 1 V pp ) 0.3 m 0.5 m 1.0 m 1.5 m 2.0 m 3.0 m others on request Cable Ø 3.7 mm Encoder - version * 3 1 non- magnetic scanning head Housing - version of attachment 2 thread M 2.5 * The LIK 41 is also available as vacuum version for pressure ranges up to 10-9 mbar. The according datasheet can be downloaded at Ordering key for scale tape Designation example scale tape: MT B P 0070 Material 1 steel 2 glass* Design type 0 3 DOUBLEFLEX, standard (ML+18 mm) 1 SINGLEFLEX, standard (ML+14 mm) 5 1 reduced scale tape length (steel) (ML+11 mm) 6 1 reduced scale length (glass) (ML+6 mm) Accuracy class 1 ± 1 µm 2 ± 2 µm 3 ± 3 µm 4 ± 5 µm 1... only for SINGLEFLEX-scale tapes and glass scales 2... only for DOUBLEFLEX-scale tapes 3... min. ML DOUBLEFLEX-scale tapes = 100 mm 4... indication in XXXXX mm after beginning of ML measuring length (ML) [mm] P 20 µm Position of reference mark O without reference mark B in the center of measuring length E 4 customized version ** Fixing*** 0 1 without bonding pad 1 2 bonding pad at start of measuring length 3 without adhesive tape 5 2 bonding pad at end of measuring length ** *... max. scale length = 100 mm **... supplied for a surcharge ***... standard with adhesive tape 0.2 mm Grating period GP 4

5 Technical specification Mechanical data Electrical data Mass of measuring head 3.0 g Scanning frequency max. 500 khz Recommended resolution Travel speed - without interpolation (maximum) - with 50x interpolation (maximum) 0.05 µm; 0.1 µm; 0.2 µm; 0.5 µm; 1.0 µm; 5.0 µm 600 m/min resp. 10 m/s 96 m/min resp. 1.6 m/s Output interfaces - Voltage output - Square wave output Supply voltage 1 V pp RS 422 with interpolation up to 100x 5 DC ± 10% Measuring length Scale tape - Material - Grating period (GP) - Reference marks Linear expansion coefficient - DOUBLEFLEX-scale tape - SINGLEFLEX-scale tape - glass scale up to 1,000 mm (only for steel scale tapes) steel or glass 20 µm standard at the center of the measuring length; others on request 10.5 x 10-6 deg -1 as function of material of the mounting surface 8 x 10-6 deg -1 Power consumption - Voltage output - Voltage output Cable lengths - cable connected to the scanning head - Standard length - Permissible total cable length Ambient conditions 50 ma ±10 ma 150 ma ±10 ma max. 3 m 0.3 m; 0.5 m; 1.0 m 1.5 m; 2.0 m; 3.0 m max. 100 m with extension cable (on request) Accuracy classes - DOUBLEFLEX-scale tape - SINGLEFLEX-scale tape - glass scale ±1 µm; ±2 µm; ±3 µm; ±5 µm ±5 µm; others on request ±1 µm Operating temperature range Storage temperature range Vibration (50 Hz... 2,000 Hz) Shock (11 ms) Humidity 0 C C -20 C C 200 ms ms -2 93% (no condensing) Standard pin assignment: 15pin D-sub plug PIN Housing 1 V PP U 0- U 2- U V 0 V - - U 0+ U 2+ U 1+ - Shield RS NAS R- B- A- - 5 V 0 V - AS R+ B+ A+ - Shield Colour - - VT PK RD BN - BU WH - - GY BK GN - - 5

6 NUMERIK JENA GmbH Ilmstrasse Jena, Germany Phone: Fax: info@numerikjena.de Internet: LIK41-D-e-10/06 Subject to change without notice