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two and three channel codewheels for use with agilent optical encoder modules technical data features: ? codewheels available in glass, film, and metal ? available in two standard diameters ? cost effective ? resolutions from 96 cpr to 2048 cpr ? for use with heds-90xx/ 91xx series two and three channel encoders description agilent technologies offers a wide variety of codewheels for use with agilents heds-9000, heds-9100, heds-9040, and heds-9140 series encoder modules. designed for many environments, applications, and budgets, agilent codewheels are available in glass, film, and metal. these codewheels are available in resolutions from 96 counts per revolution (cpr) to 1024 cpr on an 11 mm optical radius and 500 to 2048 cpr on a 23.36 mm optical radius. each of the three codewheel materials offers a certain advantage. metal codewheels are the most versatile, with a tem- perature rating up to 100 c, resolution to 512 cpr (28 mm diameter), as well as 2 and 3 channel outputs. film codewheels offer higher resolution (up to 1024 cpr on a 28 mm diameter) with an operating temperature of 70 c. glass codewheels combine the best of film and metal, offer- ing a temperature rating of 100 c and resolutions to 1024 cpr on a 28 mm diameter. in addition, each material offers a specific reliability rating. it is important to consider the specific application operating environ- ment, long term operating conditions, and temperature ranges when choosing a code- wheel material. also see: ? heds-9000/heds-9100 encoder module data sheet ? heds-9000/9100/9200 extended resolution encoder module data sheet ? heds-9040/9140 three channel encoder module data sheet ? heds-9700 small encoder module data sheet heds-51x0/61x0 series hedg-512x/612x series hedm-512x/61xx series
2 heds-xxxx hedm-xxxx hedg-xxxx parameter symbol metal codewheels film codewheels glass codewheels storage t s -40 c to +100 c -40 c to +70 c -40 c to +100 c temperature operating t a -40 c to +100 c -40 c to +70 c -40 c to +100 c temperature humidity non condensing velocity 30,000 rpm 30,000 rpm 12,000 rpm shaft axial play 0.25 mm 0.175 mm 0.175 mm ( 0.010 in) ( 0.007 in) ( 0.007 in) shaft eccentricity 0.1 mm 0.04 mm 0.04 mm plus radial play ( 0.004 in) tir ( 0.0015 in) tir ( 0.0015 in) tir acceleration 250,000 rad/sec 2 250,000 rad/sec 2 100,000 rad/sec 2 absolute maximum ratings it is important to consider the environment in which the codewheels will be used when selecting a codewheel material. in brief, metal codewheels are rugged, but do not offer higher resolution capabilities. film codewheels allow higher resolution, but cannot endure the same temperatures and high humidity as metal. glass codewheels offer both high temperature and higher resolution, but are also more expensive. consider the following rating table when choosing a codewheel material. recommended operating conditions heds-xxxx hedm-xxxx hedg-xxxx parameter metal codewheels film codewheels glass codewheels maximum count frequency 100 khz 200 khz* 200 khz shaft perpendicularity 0.25 mm 0.175 mm 0.175 mm plus axial play ( 0.010 in) ( 0.007 in) ( 0.007 in) shaft eccentricity plus 0.1 mm 0.04 mm 0.04 mm radial play ( 0.004 in) tir ( 0.0015 in) tir ( 0.0015 in) tir note: agilent encoder modules are guaranteed to 100 khz, but can operate at higher frequencies. see encoder module data sheet for specifications and output load recommendations. *hedm-6140 is guaranteed to 100 khz with the heds-9040 #t00 module.
3 encoding characteristics encoding characteristics over recommended operating range and recommended mounting part number description symbol min. typ. max. units heds-51xx cycle error d c 3 5.5 e position error dq 10 40 min. of arc heds-61xx cycle error d c 3 5.5 e position error dq 7 20 min. of arc hedm-512x cycle error d c 3 7.5 e position error dq 4 40 min. of arc HEDM-61XX cycle error d c 3 7.5 e position error dq 2 20 min. of arc hedg-512x cycle error d c 3 7.5 e position error dq 4 30 min. of arc hedg-612x cycle error d c 3 7.5 e position error dq 2 15 min. of arc reliability in addition to the absolute maximum specifications of codewheels, the environment characteristics of the application glass codewheel tests test duration number of parts number of failures storage at 100 c 1000 hours 44 0 rotating at 100 c 500 hours 10 0 temperature cycle: -40 c to +100 c 500 cycles 98 0 temperature/humidity: 85 c/85% r.h. 500 hours 43 0 film codewheel tests test duration number of parts number of failures storage at 70 c 1000 hours 118 0 rotating at 70 c 500 hours 10 0 temperature cycle: -40 c to +70 c 500 cycles 66 0 temperature cycle: +20 c to +40 c 1000 cycles 64 0 temperature cycle: +20 c to +55 c 1000 cycles 46 0 temperature cycle: +20 c to +70 c 500 cycles 50 0 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. 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.
4 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. *please note that the image side of the codewheel must always be facing the module side a. 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. figure 1a. figure 1b. module side b module side a image side of codewheel image side of codewheel module side a module side b 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 with module side b as the mounting plane, using agilent assembly tools 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 figure 2. alignment tool is used to set height of codewheel. assembly instructions using agilent assembly tools figure 3. alignment tool is placed over shaft and onto codewheel hub. alignment tool pins mate with aligning recesses on module. centering tool codewheel aligning recesses module side a module side b image side of codewheel gap setting shim codewheel module side a module side b shim should not contact the codewheel boss. (b) push codewheel down against gap setting shim. the codewheel is now at the proper height. (c) tighten codewheel setscrew. 3. insert mounting screws through module and thread into the motor base. do not tighten screws. instructions 1. place codewheel on shaft. 2. set codewheel height: (a) place the correct gap setting tool (per ordering information table) on motor base, flush up against the motor shaft as shown in figure 2. the shim has two different size steps. choose the one that most closely matches the width of the codewheel boss. the 4. slide the heds-8905 or heds- 8906 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.
6 mechanical drawings figure 4. heds-5120 codewheel. figure 5. heds-6100 codewheel. figure 6. heds-5140 codewheel used with heds-9140. 5.95 (0.234) max. 12.70 (0.500) max. 10.16 (0.400) 130??5? typical index pulse position index pulse reference marker 25.7 (1.01) dia. max. 1.80 (0.071) setscrew 3.58 (0.141) mounting boss r op = 11.00 mm (0.433 in.) dimensions in mm (inches) 26.67 (1.050) max. 18.0 (0.71) 50.0 (1.97) dia. 8.99 (0.354) max. mounting boss dimensions in mm (inches) # 2-56 setscrew use 0.035" hex wrench 0.20 (0.008) 5.94 (0.234) max. 12.70 (0.500) max. 10.16 (0.400) 1.80 (0.071) 3.58 (0.141) mounting boss ? not used on 6 mm & 1/4" i.d. hubs dimensions in mm (inches) # 2-56 setscrew use 0.035" hex wrench 25.40 (1.000) max. 0.04 max. 0.054
7 figure 7. heds-6140 codewheel used with heds-9040. figure 9. hedm-6120 codewheel/hedm-6121 codewheel. figure 8. hedm-5120 codewheel/hedm-5121 codewheel. 26.67 (1.050) max. 18.0 (0.71) 130? typical index pulse position index pulse reference marker 50.6 (1.99) dia. max. setscrew 8.99 (0.354) max. mounting boss r op = 23.36 mm (0.920 in.) dimensions in mm (inches) # 2-56 setscrew use 0.035" hex wrench 0.18 (0.007) 2-56 setscrew use 0.035" hex wrench 5.9 max. 10.2 max. 12.6 max. artwork side (hedm-5120) artwork side (hedm-5121) dia. max. 25.56 (1.006) dimensions in mm (inches) 15.3 max. 4.2 max. 0.18 (0.007) 2-56 setscrew use 0.035" hex wrench 8.5 max. 22.50 (0.886) max. artwork side (hedm-6120) artwork side (hedm-6121) dia. max. 50.48 (1.980) dimensions in mm (inches) 36.5 18 max.
8 figure 10. hedg-5120 codewheel/hedg-5121 codewheel. figure 11. hedg-6120 codewheel/hedg-6121 codewheel. figure 12. hedm-6140 codewheel/hedm-6141 codewheel. 0.55 (0.022) 2-56 setscrew use 0.035" hex wrench 5.51 (0.217) 10.2 max. artwork side (hedg-5120) artwork side (hedg-5121) dia. max. 25.56 (1.006) dimensions in mm (inches) 12.6 max. 0.55 (0.022) 2-56 setscrew use 0.035" hex wrench 8.43 (0.332) 17.98 (0.708) max. artwork side (hedg-6120) artwork side (hedg-6121) dia. max. 50.48 (1.987) dimensions in mm (inches) 22.6 max. 25.4 max. 0.18 (0.007) 2-56 setscrew use 0.035" hex wrench 8.43 (0.332) 22.50 (0.886) max. artwork side (hedm-6140) artwork side (hedm-6141) dia. max. 50.48 (1.987) dimensions in mm (inches) 36.5 130? typical index pulse position setscrew
9 ordering information encoder modules, codewheel and assembly tools heds-9100 option modules heds-5120 codewheels 0 0 option resolution (cycles/rev) s - 50 cpr k - 96 cpr c - 100 cpr d - 192 cpr e - 200 cpr f - 256 cpr g - 360 cpr h - 400 cpr a - 500 cpr i - 512 cpr shaft diameter 01 - 2 mm 02 - 3 mm 03 - 1/8 in. 04 - 5/32 in. 05 - 3/16 in. 06 - 1/4 in. 11 - 4 mm 14 - 5 mm 12 - 6 mm 13 - 8 mm rop = 11 mm, 2 channels assembly tools centering gap-setting heds- heds- 8905 8901 heds-9140 option modules heds-5140 codewheels 0 0 option shaft diameter 01 - 2 mm 02 - 3 mm 03 - 1/8 in. 04 - 5/32 in. 05 - 3/16 in. 06 - 1/4 in. 11 - 4 mm 14 - 5 mm 12 - 6 mm 13 - 8 mm rop = 11 mm, 3 channels assembly tools centering gap-setting heds- heds- 8905 8905 resolution (cycles/rev) s - 50 cpr k - 96 cpr c - 100 cpr e - 200 cpr f - 256 cpr g - 360 cpr h - 400 cpr a - 500 cpr i - 512 cpr heds-9000 option modules heds-6100 codewheels 0 0 option shaft diameter 05 - 3/16 in. 06 - 1/4 in. 07 - 5/16 in. 08 - 3/8 in. 09 - 1/2 in. 10 - 5/8 in. 11 - 4 mm 12 - 6 mm 13 - 8 mm rop = 23 mm, 2 channels assembly tools centering gap-setting heds- heds- 8906 8901 resolution (cycles/rev) a - 500 cpr b - 1000 cpr metal codewheels
10 heds-9040 option modules heds-6140 codewheels 0 0 option resolution (cycles/rev) b - 1000 cpr j - 1024 cpr shaft diameter 05 - 3/16 in. 06 - 1/4 in. 07 - 5/16 in. 08 - 3/8 in. 09 - 1/2 in. 10 - 5/8 in. 11 - 4 mm 12 - 6 mm 13 - 8 mm rop = 23 mm, 3 channels assembly tools centering gap-setting heds- heds- 8906 8906 ordering information (contd.) note: 1. for the lower resolution, two channel encoders, (11 mm 512 cpr; 23 mm 1024 cpr) the centering tool and gap-settting shim are not necessary, but sometimes helpful in an assembly process. heds-9100 modules option film codewheels 0 0 artwork orientation 0 - artwork on hub side (use when module side b is down) 1 - artwork opposite hub side (use when module side a is down) resolution (cycles/rev) b - 1000 cpr j - 1024 cpr shaft diameter 01 - 2 mm 02 - 3 mm 03 - 1/8 in. 04 - 5/32 in. 05 - 3/16 in. 06 - 1/4 in. 11 - 4 mm 14 - 5 mm 12 - 6 mm 13 - 8 mm assembly tools centering gap-setting heds- heds- 8905 8901 rop = 11 mm, 2 channels hedm-512 codewheels option
11 heds-9000 modules option hedm-612 codewheels option 0 0 artwork orientation 0 - artwork on hub side (use when module side b is down) 1 - artwork opposite hub side (use when module side a is down) resolution (cycles/rev) t - 2000 cpr u - 2048 cpr shaft diameter 05 - 3/16 in. 06 - 1/4 in. 07 - 5/16 in. 08 - 3/8 in. 09 - 1/2 in. 10 - 5/8 in. 11 - 4 mm 12 - 6 mm 13 - 8 mm assembly tools centering gap-setting heds- heds- 8906 8906 rop = 23 mm, 2 channels heds-9040 modules option hedm-614 codewheels option 0 0 artwork orientation* 0 - artwork on hub side (use when module side b is down) 1 - artwork opposite hub side (use when module side a is down) resolution (cycles/rev) t - 2000 cpr shaft diameter 05 - 3/16 in. 06 - 1/4 in. 07 - 5/16 in. 08 - 3/8 in. 09 - 1/2 in. 10 - 5/8 in. 11 - 4 mm 12 - 6 mm 13 - 8 mm assembly tools centering gap-setting heds- heds- 8906 8906 rop = 23 mm, 3 channels ordering information (contd.) *index will not work if wrong orientation is used.
ordering information (contd.) glass codewheels heds-9100 modules option hedg-512 codewheels option 0 0 artwork orientation 0 - artwork on hub side (use when module side b is down) 1 - artwork opposite hub side (use when module side a is down) resolution (cycles/rev) b - 1000 cpr j - 1024 cpr assembly tools centering gap-setting heds- heds- 8905 8932 rop = 11 mm, 2 channels heds-9000 modules option hedg-612 codewheels option 0 0 artwork orientation 0 - artwork on hub side (use when module side b is down) 1 - artwork opposite hub side (use when module side a is down) resolution (cycles/rev) t - 2000 cpr u - 2048 cpr assembly tools centering gap-setting heds- heds- 8906 8932 rop = 23 mm, 2 channels shaft diameter 05 - 3/16 in. 06 - 1/4 in. 07 - 5/16 in. 08 - 3/8 in. 09 - 1/2 in. 10 - 5/8 in. 11 - 4 mm 12 - 6 mm 13 - 8 mm shaft diameter 01 - 2 mm 02 - 3 mm 03 - 1/8 in. 04 - 5/32 in. 05 - 3/16 in. 06 - 1/4 in. 11 - 4 mm 14 - 5 mm 12 - 6 mm 13 - 8 mm www.semiconductor.agilent.com data subject to change. copyright ? 1999 agilent technologies, inc. obsoletes 5964-6127e (1/96) 5965-5891e (11/99)

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