SE22HR Small Encoder High Resolution 5V optical encoder up to 2048 CPR

Transcription

1 SE22HR Small Encoder High Resolution 5V optical encoder up to 2048 CPR Description SE22HR is a very high performance hollow shaft encoder; a high resolution is achievable in a small space with a good performance/price ratio. The assembly is very easy, available shaft diameters are in the range from 1.5 to 8.0 mm. The device provides two incremental encoding square wave signals outputs A and B and a tracked index. The device is very suitable for speed and incremental position detection in the applications requiring high reliability, very good performances, easy and fast assembly. Features Mechanical dimensions Dimensions: 22.6 mm diameter, 21.0 mm height Quick and easy assembly, no signal adjusting required Resolution: up to 2048 CPR (Counts Per Rotation) Output channels: A and B (quadrature) + tracked index Power supply: 5 Vdc Output type: push-pull or line driver Frequency: up to 220 khz Maximum shaft diameter: 8.0 mm Operating temperature: -20 C to +85 C RoHS compliant Operating Conditions Electrical characteristics are effective in the range of typical operating values as 25 C and Vcc = 5V Parameter Symbol Min. Typ. Max. Unit Notes Operating temperature T A C Supply voltage V cc V Ripple < 100 mv p-p Supply current (push-pull or line driver) I cc ma No load Output frequency f 220 khz RPM x CPR / 60 x 10-3 A, B & Index channels High level output (push-pull or line driver) V oh V I out = -20 ma Low level output (push-pull or line driver) V ol V I out = 20 ma Differential output voltage (line driver) Vt V R L = 100 Ω, EIA RS422 spec. VEM tech Scrl V. A. Diaz, Domegliara (VR) ITALY, Doc. release Feb. 27 th 2012 page 1/5

2 Encoding characteristics OUTPUT WAVEFORM A C 360 e P B S1 S2 S3 S4 Φ I P0 Index of 90 e When the encoder rotation is anti-clockwise (top view), channel A leads channel B. Parameter Symbol Unit 500 and 512 CPR 1000 and 1024 CPR 2000 and 2048 CPR Cycle error ΔC e Pulse width error ΔP e Phase error ΔΦ e State error ΔS e Index pulse width P e Output frequency max fmax khz Note The upper table is valid when the encoder is correctly assembled as described in the assembly section on page 4. VEM tech Scrl V. A. Diaz, Domegliara (VR) ITALY, Doc. release Dec. 7 th 2011 page 2/5

3 Electrical interface Encoder flange Mechanical characteristics Parameter Value Tolerance Unit Dimensions Ø 22,6 x 21,0 ref. mm Shaft diameter SD (* i.e. see below picture) 1.50, 2.00, 2.30, 2.50, 3.00, 3.175(1/8 ), 4.00, 5.00, 5.80, 6.00, 6.35 (1/4 ), 8.00 ±0.01 mm Required shaft length SL (*) 9.5 ±1.0 mm Max. axial shaft play mm Max. radial shaft play mm Tightening screw torque 15 ref. Ncm Screws wheelbase 17.0 ±1.0 mm Bearing boss (if present) diameter BD (*) 11.0 Max +0 /-0.03 mm Bearing boss (if present) height BH (*) 2.5 Max -0.1 mm Mating connector (Molex) contact 8x housing 1x Total weight 9.4 ref. g Protection grade (according to DIN 40500) IP VEM tech Scrl V. A. Diaz, Domegliara (VR) ITALY, Doc. release Feb. 27th 2012 page 3/5

4 Assembly process 1 2 For good encoder performances the base plate hole MUST BE CONCENTRIC to the shaft. The accessory centering gauge is recommended. The base plate should be fixed to the flange by using the accessory screws. 3 4 Align the housing to the base plate (the black arrow on the label to be aligned with one of the two snap fasteners on the flange), move the housing towards the base plate and the hub centers itself on the motor shaft. Press the housing to the final position, the encoder is now ready. Assembly remarks The encoder flange could be also assembled and centered also by using a mounting boss on the motor rear. Shaft diameters, shaft length and tolerances are showed in the previous table. THE ENCODER BASE PLATE MUST BE ASSEMBLED CONCENTRIC TO THE MOTOR SHAFT FOR THE RIGHT ENCODER SIGNAL PERFORMANCES. VEM tech Scrl V. A. Diaz, Domegliara (VR) ITALY, Doc. release Dec. 7 th 2011 page 4/5

5 Available accessories (no parts of standard delivery) cable 300 mm length (UL1061 / AWG28), 8 poles centering gauge for different motor shafts fastening screws DIN 84 M1.6 x 6 mm self-tapping screws for plastic WN1412 KA18 x 8 mm adapter plates for different motors (on customer request). Ordering code information SE22HR RRRR DDD IZZ COO S Encoder resolution (CPR) Motor shaft diameter (hundredth of mm) Index type Output option Model Note 500, 512, 1000, 1024, 2000, , 200, 230, 250, 300, 317, 400, 500, 580, 600, 635 and 800 I90 = 90 e index CLD = line-driver interface or push-pull S = Standard 5V power supply The push-pull interface is available with the line driver one: you use only the encoder output A+, B+ and I+ output. IMPORTANT NOTICE The encoder is so designed that it may be assembled only one time, otherwise the guarantee will be voided. The guarantee will be voided by misuse, accident, modification, unsuitable physical or operating environment, operation in other than the specified operating environment, or failure caused by a product for which VEM tech S.c.r.l. is not responsible. ESD Warning: normal handling precautions should be taken to avoid static discharge damage to the device. VEM tech Scrl reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services also datasheets at any time. VEM tech Scrl Via A. Diaz, Domegliara S. Ambrogio di Valpolicella (VR), ITALY Tel Fax info@vemtech.it Skype: vemtech.italia VEM tech Scrl V. A. Diaz, Domegliara (VR) ITALY, Doc. release Feb. 27th 2012 page 5/5