1250/2500 Commutation Encoder Modules with Codewheel AEDB-9340 op
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AEDB-9340 Series
1250/2500 Commutation Encoder Modules with Codewheel
AEDB-9340 optical encoder series six-channel optical incremental encoder modules with codewheel. encoder compliant RoHS directive been declared lead free product. When used with codewheel, these modules detect rotary position. Each module consists collimated source detector enclosed within small plastic package. highly collimated light source unique photo detector array designs, these modules extremely tolerant mounting misalignment. AEDB-9340 optical encoder integrated commutation output two-channel quadrature outputs plus third channel index output This ungated index output positive index pulse that generated once each full rotation codewheel. AEDB-9340 series optical encoder designed with codewheel that optical radius (0.590 inch) 1250/2500 CPR, 12.3 (0.484 inch) 1024/2048 (0.472 inch) 1000/ 2000 CPR. quadrature, index, commutation signals power supplied encoder accessed through eight 0.46 square male connector pins located 1.27 (pitch). AEDB-9340 optical encoder provides advanced motion control detection with integrated commutation outputs equivalent those produced Hall Switches, thus making ideal servo motor application. With AEDB-9340 solution, system will more compact, have reduced alignment time with usage alignment jig, thus making assembly process much easier housed encoder integration. superior switching accuracy much lower hysteresis when compared Hall Switches. commutation signals generated Brushless motor different rotor pole-pairs simply changing with matching pole-pair codewheel.
Features
Two-channel quadrature output with ungated index pulse Three-channel integrated commutation output 2500 Cycles Revolution (CPR) Easy assembly with alignment Designed into circular shaped housing frequency response -10°C 85°C operating temperature compatible Single supply Integrated feedback device Brushless Motor
Applications
Typical applications include industrial printers, plotters, tape drives, industrial factory automation equipment.
Note: Avago Technologies encoders recommended safety critical applications, e.g., braking systems, power steering, life support systems critical care medical equipment. Please contact sales representative more clarification needed.
Theory Operation
AEDB-9340 optical encoder emitter-detector module. Coupled with codewheel, these modules translate rotary motion shaft into six-channel digital output. modules contain single Light Emitting Diode (LED) light source. light collimated into parallel beam means polycarbonate lens located directly over LED. Opposite emitter detector This consists multiple sets photo detectors signal processing circuitry necessary produce digital waveforms output. codewheel rotates between emitter detector, causing light beam interrupted pattern spaces bars codewheel. Photodiodes that detect these interruptions arranged pattern that corresponds radius design codewheel. These detectors also spaced such away that light period pair detectors corresponds dark period adjacent pair detectors. photodiode outputs then through signal processing circuitry resulting Comparators receive these signals produce final outputs channels this integrated phasing technique, digital output channel quadrature with that channel degrees phase). commutation feedback signals generated based codewheel design.
Cycle Error (DC): indication cycle uniformity. difference between observed shaft angle which gives rise electrical cycle, nominal angular increment revolution. Pulse Width (P): number electrical degrees that output high during cycle. This value nominally 180°e cycle. Pulse Width Error deviation, electrical degrees, pulse width from ideal value 180°e. State Width (S): numbers electrical degrees between transitions output channel neighboring transition output channel There states cycle, each nominally 90°e. State Width Error deviation, electrical degrees, each state width from ideal value 90°e. Commutation Accuracy deviation, mechanical degrees, after shaft rotates passing reference point (Index channel) first Channel-U pulse. measurement from middle Channel-I rising edge Channel-U. Phase (f): numbers electrical degrees between center high state channel center high state channel This value nominally 90°e quadrature output. This value nominally 90°e quadrature output. Phase Error deviation phase from ideal value 90°e. Direction Rotation: When codewheel rotates clockwise direction viewing from module (direction from channel will lead channel codewheel rotates opposite direction (direction from channel will lead channel Optical Radius (Rop): distance from codewheel's center rotation optical center (O.C.) encoder module. Index Pulse Width (Po): number electrical degrees that index high with reference channel channel during full shaft rotation.
Definitions
Cycles (N): number electrical cycles revolution (CPR). Note: refers signal from encoder, that cycles before decode. Cycle: electrical degrees (°e). Shaft Rotation: mechanical degrees.
AEDB-9340 Technical Specifications Absolute Maximum Ratings
Parameter Storage Temperature Operating Temperature Supply Voltage Symbol Min. -0.5 Max. Units Volts Notes
Recommended Operating Conditions
Parameter Temperature Supply Voltage (Detector) Operating Frequency 1250 2500 Shaft Radial Play Plus Eccentricity Shaft Axial Play Min. Typ. Max. ±0.025 ±0.100 Units Volts Notes Ripple mVpp Velocity (rpm) N/60
Electrical Characteristics
Electrical Characteristics over Recommend Operating Range, Typical 25°C Parameter Supply Current High Level Output Voltage Level Output Voltage Rise Time Fall Time Loading Capacitance Symbol CLOAD Min. Typ. Max. Units Notes
Encoding Characteristics
Encoding Characteristics over Recommended Operating Conditions Mounting tolerances. These characteristics include codewheel contribution. typical values average over full rotation codewheel tested 25°C, RPM, Parameter Pulse Width Error Logic State Width Error Phase Error Cycle Error Position Error Index Pulse Width 1000/1024/1250 2000/2048/2500 Symbol Minimum Typical Maximum Units min.
Commutation Characteristics (Channel
Encoding Characteristics over Recommended Operating Conditions Mounting Conditions. These characteristics include codewheel contribution. typical values average over full rotation codewheel. Parameter Commutation Format Commutation Accuracy (Middle Channel Channel Commutation Accuracy (Channel Symbol Minimum Maximum Three Phase poles Units
°mechanical °mechanical
Device Pinout
start from left side. Function Ground
Package Dimensions
40.12 28.4 20.00 1.50 1.000 1.11 12.6 1.000 22.00
0.50 19.75
33.4 CHAMFER 1.60
VIEW
Note: dimensions given Figure 1000/1024/1250/2000/2048/2500 encoder module dimensions
Package Dimensions, continued
40.12 28.4 20.0 1.000 1.50 1.000 22.00
12.6 19.923 33.4 10.4 9.300 9.300 37.42
35.00
12.00 10.000 VIEW 9.75 0.50
Note: dimensions given
Figure 1250/2500 encoder module with codewheel dimensions
Mounting Considerations
25.40 12.70
2.00
13.33
16.00
BOTTOM VIEW RECOMMENDED SCREW SIZE: M1.6 0.35 RECOMMENDED MOUNTING SCREW TORQUE: 1Lbin (0.113 NOTES: DIMENSIONS GIVEN ALIGNMENT TOOL HEDS-8952 MOUNT ENCODER WITH RESPECT SHAFT CENTER. REFER AEDB-9340 SERIES APPLICATION NOTE STEP STEP ALIGNMENT INSTALLATION PROCEDURE.
Figure 1250/2500 encoder mounting considerations
Package Dimensions
40.12
33.4
28.4 1.000 1.50 1.000
12.6
6.588 31.91
29.40
12.00 9.75 0.50
VIEW NOTE: DIMENSIONS GIVEN
Figure 1024/2048 encoder module with codewheel dimensions
Mounting Considerations
25.40 20.00 12.70 22.00
2.00
10.62
2.71
16.00 BOTTOM VIEW
RECOMMENDED SCREW SIZE: M1.6 0.35 RECOMMENDED MOUNTING SCREW TORQUE: 1Lbin (0.113 NOTES: DIMENSIONS GIVEN ALIGNMENT TOOL HEDS-8951 MOUNT ENCODER WITH RESPECT SHAFT CENTER. REFER AEDB-9340 SERIES APPLICATION NOTE STEP STEP ALIGNMENT INSTALLATION PROCEDURE.
Figure 1024/2048 encoder mounting considerations
Package Dimensions
40.12
28.4 1.000 1.50 1.000
12.6
7.41
33.4
6.300
6.300 31.42
29.00
12.00 10.000 9.75 0.50
VIEW
NOTE: DIMENSIONS GIVEN
Figure 1000/2000 encoder module with codewheel dimensions
Mounting Considerations
25.40 20.00 12.70 22.00
2.00
10.33
3.00
16.00
BOTTOM VIEW
RECOMMENDED SCREW SIZE: M1.6 0.35 RECOMMENDED MOUNTING SCREW TORQUE: 1Lbin (0.113 NOTES: DIMENSIONS GIVEN ALIGNMENT TOOL HEDS-8950 MOUNT ENCODER WITH RESPECT SHAFT CENTER. REFER AEDB-9340 SERIES APPLICATION NOTE STEP STEP ALIGNMENT INSTALLATION PROCEDURE.
Figure 1000/2000 encoder module mounting considerations
1.80
0.20 CODEWHEEL 3.00 3.80 1.10 12.50 5.50 14.33
6.03 0.80
SHAFT
RIGHT VIEW NOTES: DIMENSIONS GIVEN CODEWHEEL ALIGNED FROM DATUM
Figure 1000/1024/1250/2000/2048/2500 encoder module codewheel mounting considerations
Codewheel Mechanical Drawing
12.50
5.50
0.01
16.00
0.01
12.00
2-TAP TILL HOLE
3.00
NOTES: DIMENSIONS GIVEN MILLIMETERS (mm). INTERNAL DIAMETER (BASED SHAFT DIAMETER OPTION SELECTED). CODEWHEEL OUTER DIAMETER. CODEWHEEL 1250/2500 1024/2048 1000/2000 OUTER DIAMETER 29.4
SECTION
Figure Codewheel dimensions
Output Waveform Specifications
360e-DEG
QUADRATURE SIGNALS
MECHANICAL DEGREE
MECH-DEG
MECH-DEG
ABSOLUTE MECHANICAL REVOLUTION (360 MECH-DEG)
INDEX COMMUTATION SIGNALS
Figure Output waveform specification pole pairs poles) counterclockwise rotation, viewed from top.
Note: above waveform, quadrature signals drawn scale with respect index pulse commutation signals.
Pole State Width Table
Pole Number States/ State Width Mechanical Revolution (Mechanical Degree)
Ordering Information Encoder Bundled with Codewheel
AEDB-9340 2500 2048 2000 1250 1024 1000 Shaft 5/32 3/16 Pole Pair Pole Pairs Pole Pairs Pole Pairs
Encoder Only
AEDS-9340 2500 2048 2000 1250 1024 1000
Alignment Tool
HEDS-8950 Alignment tool 1000/2000 HEDS-8951 Alignment tool 1024/2048 HEDS-8952 Alignment tool 1250/2500
Note: Options highlighted currently available order. Contact factory enquiries rest options.
product information complete list distributors, please website:
www.avagotech.com
Avago, Avago Technologies, logo trademarks Avago Technologies Limited United States other countries. Data subject change. Copyright 2007 Avago Technologies Limited. rights reserved. Obsoletes AV01-0248EN AV02-0075EN January 2007
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