Two and Three Channel Codewheels for Use with Agilent Optical Encoder Modules. Technical Data

Transcription

1 Two and Three Channel Codewheels for Use with Agilent Optical Encoder Modules Technical Data HEDS-51X/61X Series HEDG-512X/612X Series HEDM-512X/61XX Series Features: Codewheels Available in Glass, Film, and Metal Available in Two Standard Diameters Cost Effective s from 96 CPR to 248 CPR For Use with HEDS-9XX/ 91XX Series Two and Three Channel Encoders Lead Free Description Agilent Technologies offers a wide variety of for use with Agilent s HEDS-9, HEDS-91, HEDS-94, and HEDS-914 series Encoder Modules. Designed for many environments, applications, and budgets, Agilent are available in Glass, Film, and Metal. These are available in resolutions from 96 Counts Per Revolution (CPR) to 124 CPR on an 11 mm optical radius and 5 to 248 CPR on a mm optical radius. Each of the three codewheel materials offers a certain advantage. Metal are the most versatile, with a temperature rating up to 1 C, resolution to 512 CPR (28 mm diameter), as well as 2 and 3 channel outputs. Film offer higher resolution (up to 124 CPR on a 28 mm diameter) with an operating temperature of 7 C. Glass combine the best of film and metal, offering a temperature rating of 1 C and resolutions to 124 CPR on a 28 mm diameter. In addition, each material offers a specific reliability rating. It is important to consider the specific application operating environment, long term operating conditions, and temperature ranges when choosing a codewheel material. Also See: HEDS-9/HEDS-91 Encoder Module Data Sheet HEDS-9/91/92 Extended Encoder Module Data Sheet HEDS-94/914 Three Channel Encoder Module Data Sheet HEDS-97 Small Encoder Module Data Sheet

2 2 Absolute Maximum Ratings It is important to consider the environment in which the will be used when selecting a codewheel material. In brief, metal are rugged, but do not offer higher resolution capabilities. Film allow higher resolution, but cannot endure the same temperatures and high humidity as metal. Glass offer both high temperature and higher resolution, but are also more expensive. Consider the following rating table when choosing a codewheel material. HEDS-XXXX HEDM-XXXX HEDG-XXXX Parameter Symbol Metal Codewheels Film Codewheels Glass Codewheels Storage T S -4 C to +1 C -4 C to +7 C -4 C to +1 C Temperature Operating T A -4 C to +1 C -4 C to +7 C -4 C to +1 C Temperature Humidity non condensing Velocity 3, RPM 3, RPM 12, RPM Shaft Axial Play ±.25 mm ±.175 mm ±.175 mm (±.1 in) (±.7 in) (±.7 in) Shaft Eccentricity ±.1 mm ±.4 mm ±.4 mm Plus Radial Play (±.4 in) TIR (±.15 in) TIR (±.15 in) TIR Acceleration 25, Rad/Sec 2 25, Rad/Sec 2 1, Rad/Sec 2 Recommended Operating Conditions HEDS-XXXX HEDM-XXXX HEDG-XXXX Parameter Metal Codewheels Film Codewheels Glass Codewheels Maximum Count Frequency 1 khz 2 khz* 2 khz Shaft Perpendicularity ±.25 mm ±.175 mm ±.175 mm Plus Axial Play (±.1 in) (±.7 in) (±.7 in) Shaft Eccentricity Plus ±.1 mm ±.4 mm ±.4 mm Radial Play (±.4 in) TIR (±.15 in) TIR (±.15 in) TIR Note: Agilent Encoder Modules are guaranteed to 1 khz, but can operate at higher frequencies. See Encoder Module Data Sheet for specifications and output load recommendations. *HEDM-614 is guaranteed to 1 khz with the HEDS-94 #T module.

3 3 Encoding Characteristics Encoding characteristics over recommended operating range and recommended mounting tolerances unless otherwise specified. Values are for worst error over a full rotation. Please refer to Encoder Module Data Sheet for definitions of Encoding characteristics. Part Number Description Symbol Min. Typ. Max. Units HEDS-51XX Cycle Error C e Position Error θ 1 4 min. of arc HEDS-61XX Cycle Error C e Position Error θ 7 2 min. of arc HEDM-512X Cycle Error C e Position Error θ 4 4 min. of arc HEDM-61XX Cycle Error C e Position Error θ 2 2 min. of arc HEDG-512X Cycle Error C e Position Error θ 4 3 min. of arc HEDG-612X Cycle Error C e Position Error θ 2 15 min. of arc Reliability In addition to the absolute maximum specifications of, the environment characteristics of the application are also important. For example, consistent, large temperature swings over the life of the product will affect the codewheel performance characteristics depending on the material. The following reliability table shows results of lifetests under varying conditions of temperature and humidity. Glass Codewheel Tests Test Duration Number of Parts Number of Failures Storage at 1 C 1 hours 44 Rotating at 1 C 5 hours 1 Temperature Cycle: -4 C to +1 C 5 cycles 98 Temperature/Humidity: 85 C/85% R.H. 5 hours 43 Film Codewheel Tests Test Duration Number of Parts Number of Failures Storage at 7 C 1 hours 118 Rotating at 7 C 5 hours 1 Temperature Cycle: -4 C to +7 C 5 cycles 66 Temperature Cycle: +2 C to +4 C 1 cycles 64 Temperature Cycle: +2 C to +55 C 1 cycles 46 Temperature Cycle: +2 C to +7 C 5 cycles 5

4 4 Mounting Rotary Encoders with Codewheels There are two orientations for mounting the Agilent encoder module and Agilent codewheel. Figure 1a shows mounting the module with side A as the mounting plane. Figure 1b shows mounting the module with side B as the mounting plane. When assembling the encoder and codewheel, it is important to maintain the tolerances of Side A of the module, and the image side of the codewheel. See module Data Sheets for these tolerances. MODULE SIDE B IMAGE SIDE OF CODEWHEEL MODULE SIDE A IMAGE SIDE OF CODEWHEEL MODULE SIDE A MODULE SIDE B Figure 1a. Figure 1b. *Please note that the image side of the codewheel must always be facing the module Side A. Mounting with Module Side A as the Mounting Plane Mounting a high resolution or three channel encoder with Module Side A as the mounting plane requires alignment pins in the motor base. These alignment pins provide the necessary centering of the module with respect to the center of the motor shaft. In addition to centering, the codewheel gap is also important. Please refer to the respective encoder data sheet for necessary mounting information. Mounting with Module Side B as the Mounting Plane, using Agilent Agilent offers centering tools and gap setting tools only for the case when the module is mounted with Side B down. Please refer to the Ordering Information Table to choose the correct assembly tools.

5 5 Assembly Instructions Using Agilent Instructions shim should not contact the 1. Place codewheel on shaft. codewheel boss. 2. Set codewheel height: (b) Push codewheel down (a) Place the correct gap against gap setting shim. The setting tool (per Ordering codewheel is now at the proper Information Table) on motor height. base, flush up against the (c) Tighten codewheel motor shaft as shown in Figure setscrew. 2. The shim has two different 3. Insert mounting screws size steps. Choose the one that through module and thread most closely matches the width into the motor base. Do not of the codewheel boss. The tighten screws. 4. Slide the HEDS-895 or HEDS- 896 centering tool over codewheel hub and onto module as shown in Figure 3. The pins of the alignment tool should fit snugly inside the alignment recesses of the module. 5. While holding alignment tool in place, tighten screws down to secure module. 6. Remove alignment tools. IMAGE SIDE OF CODEWHEEL GAP SETTING SHIM CODEWHEEL MODULE SIDE A CENTERING TOOL CODEWHEEL ALIGNING RECESSES MODULE SIDE A MODULE SIDE B MODULE SIDE B Figure 2. Alignment Tool is Used to Set Height of Codewheel. Figure 3. Alignment Tool is Placed over Shaft and onto Codewheel Hub. Alignment Tool Pins Mate with Aligning Recesses on Module.

6 6 Mechanical Drawings 25.4 (1.) 12.7 (.5) 1.8 (.71) 1.16 (.4) 5.94 (.234) MOUNTING BOSS NOT USED ON 6 mm & 1/4" I.D. HUBS 5. (1.97) DIA (1.5) # 2-56 SETSCREW USE.35" HEX WRENCH 18. (.71) MOUNTING BOSS DIMENSIONS IN MM (INCHES) 3.58 (.141) # 2-56 SETSCREW USE.35" HEX WRENCH.4.54 DIMENSIONS IN MM (INCHES) 8.99 (.354).2 (.8) Figure 4. HEDS-512 Codewheel. Figure 5. HEDS-61 Codewheel (.234) 25.7 (1.1) DIA. 1.8 (.71) MOUNTING BOSS INDEX PULSE REFERENCE MARKER SETSCREW 12.7 (.5) 1.16 (.4) INDEX PULSE POSITION 13 ± 5 TYPICAL 3.58 (.141) R OP = 11. mm (.433 in.) DIMENSIONS IN MM (INCHES) Figure 6. HEDS-514 Codewheel Used with HEDS-914.

7 7 5.6 (1.99) DIA. # 2-56 SETSCREW USE.35" HEX WRENCH MOUNTING BOSS INDEX PULSE REFERENCE MARKER SETSCREW (1.5) 18. (.71) INDEX PULSE POSITION R OP = mm (.92 in.) DIMENSIONS IN MM (INCHES) 13 TYPICAL 8.99 (.354) Figure 7. HEDS-614 Codewheel Used with HEDS (.7) (.7) SETSCREW USE.35" HEX WRENCH (.886) 2-56 SETSCREW USE.35" HEX WRENCH DIA. (1.6) (HEDM-5121) (HEDM-512) 5.48 DIA. (1.98) (HEDM-6121) (HEDM-612) DIMENSIONS IN mm (INCHES) DIMENSIONS IN mm (INCHES) Figure 8. HEDM-512 Codewheel/HEDM-5121 Codewheel. Figure 9. HEDM-612 Codewheel/HEDM-6121 Codewheel.

8 8.55 (.22) 2-56 SETSCREW USE.35" HEX WRENCH 5.51 (.217).55 (.22) 2-56 SETSCREW USE.35" HEX WRENCH 8.43 (.332) (.78) DIA. (1.6) (HEDG-5121) (HEDG-512) 5.48 DIA. (1.987) (HEDG-6121) (HEDG-612) DIMENSIONS IN mm (INCHES) DIMENSIONS IN mm (INCHES) Figure 1. HEDG-512 Codewheel/HEDG-5121 Codewheel. Figure 11. HEDG-612 Codewheel/HEDG-6121 Codewheel DIA. (1.987).18 (.7) 2-56 SETSCREW USE.35" HEX WRENCH 8.43 (.332) SETSCREW (.886) INDEX PULSE POSITION 13 TYPICAL (HEDM-6141) (HEDM-614) DIMENSIONS IN mm (INCHES) Figure 12. HEDM-614 Codewheel/HEDM-6141 Codewheel.

9 9 Ordering Information Encoder Modules, Codewheel and Metal Codewheels HEDS-91 HEDS-512 K - 96 CPR C - 1 CPR D CPR E - 2 CPR F CPR G - 36 CPR H - 4 CPR A - 5 CPR I CPR Rop = 11 mm, 2 Channels 1-2 mm 2-3 mm 3-1/8 in. 4-5/32 in. 5-3/16 in. 6-1/4 in mm 14-5 mm 13-8 mm HEDS-512# A * * * * * * * * * C * * * * * * D * E * * F * G * * * * * * H * * * * * I * * * * * * K * * HEDS-914 HEDS-514 C - 1 CPR E - 2 CPR F CPR G - 36 CPR A - 5 CPR I CPR 2-3 mm 3-1/8 in. 4-5/32 in. 5-3/16 in. 6-1/4 in. Rop = 11 mm, 3 Channels 11-4 mm 14-5 mm 13-8 mm HEDS-514 A * * * * * * * * C * * * * E * * * * F * * * G * * * I * * * * * * *

10 1 Ordering Information (Cont d.) HEDS-9 HEDS-61 A - 5 CPR B - 1 CPR Rop = 23 mm, 2 Channels 6-1/4 in. 8-3/8 in. 9-1/2 in. 1-5/8 in mm 13-8 mm HEDS-61# A * * * B * * * * HEDS-94 HEDS-614 B - 1 CPR J CPR Rop = mm, 3 Channels 6-1/4 in. 8-3/8 in. 9-1/2 in. 1-5/8 in mm 13-8 mm HEDS-614# B * * * * * * * J * * * * Note: 1. For the lower resolution, two channel encoders, (11 mm 512 CPR; mm 124 CPR) the centering tool and gap-setting shim are not necessary, but sometimes helpful in an assembly process.

11 11 Ordering Information (Cont d.) Film Codewheels HEDS-9 HEDM-512 Rop = 11 mm, 2 Channels B - 1 CPR J CPR Artwork Orientation - Artwork on hub side (use when module side B is 1 - Artwork opposite hub side (use when module side A is 2-3 mm 6-1/4 in mm HEDM-512# B * * * * J * * HEDM-5121 B * * J HEDS-9 HEDM-612 Rop = mm, 2 Channels T - 2 CPR U CPR Artwork Orientation - Artwork on hub side (use when module side B is 1 - Artwork opposite hub side (use when module side A is 6-1/4 in. 8-3/8 in mm HEDM-612# T * * * * U * HEDM-6121# T *

12 12 Ordering Information (Cont d.) HEDS-94 HEDM-614 Rop = mm, 3 Channels T - 2 CPR Artwork Orientation* - Artwork on hub side (use when module side B is 1 - Artwork opposite hub side (use when module side A is 1-5/8 in HEDM-614# T * HEDM-6141# T * Glass Codewheels HEDS-91 HEDG-512 Rop = 11 mm, 2 Channels B - 1 CPR J CPR Artwork Orientation - Artwork on hub side (use when module side B is 1 - Artwork opposite hub side (use when module side A is 6-1/4 in mm HEDG-5121# B * * J *

13 13 Ordering Information (Cont d.) HEDS-9 HEDG-612 Rop = mm, 2 Channels T - 2 CPR U CPR HEDG-612# U *

14 For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (8) or (916) Europe: +49 () China: Hong Kong: (+65) India, Australia, New Zealand: (+65) Japan: (+81 3) (Domestic/International), or (Domestic Only) Korea: (+65) Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) Taiwan: (+65) Data subject to change. Copyright 24 Agilent Technologies, Inc. Obsoletes EN March 12, EN