HEDS-51X0/61X0 Series, HEDG-512X/612X Series
HEDM-512X/61XX Series
Two and Three Channel Codewheels
for use with Avago Technologies Optical Encoder Modules
Data Sheet
Description
Avago Technologies oers a wide variety of codewheels
for use with Avago Technologies’ HEDS-9000, HEDS-
9100, HEDS-9040, and HEDS-9140 series Encoder Mod-
ules. Designed for many environments, applications,
and budgets, Avago Technologies’ codewheels are avail-
able 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 oers a certain
advantage. Metal codewheels are the most versatile,
with a temperature rating up to 100°C, resolution to
512 CPR (28 mm diameter), as well as 2 and 3 channel
outputs. Film codewheels oer higher resolution (up to
1024 CPR on a 28 mm diameter) with an operating tem-
perature of 70°C. Glass codewheels combine the best of
lm and metal, oering a temperature rating of 100°C
and resolutions to 1024 CPR on a 28 mm diameter.
In addition, each material oers a specic reliability rat-
ing. It is important to consider the specic application
operating environment, long term operating condi-
tions, 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
Features:
• Codewheels Available in Glass, Film, and Metal
• Available in Two Standard Diameters
• Cost Eective
• Resolutions from 96 CPR to 2048 CPR
• For Use with HEDS-90XX/91XX Series Two and Three
Channel Encoders
• Lead Free
2
HEDS-XXXX HEDM-XXXX HEDG-XXXX
Parameter Symbol Metal Codewheels Film Codewheels Glass Codewheels
Storage TS -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/Sec2 250,000 Rad/Sec2 100,000 Rad/Sec2
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 oer higher resolution capabilities. Film codewheels
allow higher resolution, but cannot endure the same
temperatures and high humidity as metal. Glass code-
wheels oer both high temperature and higher resolu-
tion, but are also more expensive. Consider the follow-
ing 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: Avago Technologies Encoder Modules are guaranteed to 100 kHz, but can operate at higher frequencies. See Encoder Module Data Sheet
for specications 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 tolerances unless
otherwise specied. Values are for worst error over a full
rotation. Please refer to Encoder Module Data Sheet for
denitions of Encoding characteristics.
Part Number Description Symbol Min. Typ. Max. Units
HEDS-51XX Cycle Error ∆C 3 5.5 °e
Position Error ∆θ 10 40 min. of arc
HEDS-61XX Cycle Error ∆C 3 5.5 °e
Position Error ∆θ 7 20 min. of arc
HEDM-512X Cycle Error ∆C 3 7.5 °e
Position Error ∆θ 4 40 min. of arc
HEDM-61XX Cycle Error ∆C 3 7.5 °e
Position Error ∆θ 2 20 min. of arc
HEDG-512X Cycle Error ∆C 3 7.5 °e
Position Error ∆θ 4 30 min. of arc
HEDG-612X Cycle Error ∆C 3 7.5 °e
Position Error ∆θ 2 15 min. of arc
Reliability
In addition to the absolute maximum specications
of codewheels, the environment characteristics of the
application are also important. For example, consistent,
large temperature swings over the life of the product
will aect the codewheel performance characteristics
depending on the material. The following reliability ta-
ble shows results of lifetests under varying conditions
of temperature and humidity.
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
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.
Mounting with Module Side B as the Mounting Plane,
using Avago Technologies Assembly Tools
Avago Technologies oers centering tools and gap set-
ting tools only for the case when the module is mount-
ed with Side B down. Please refer to the Ordering Infor-
mation Table to choose the correct assembly tools.
*Please note that the image side of the codewheel must always be facing the module Side A.
Figure 1a. Figure 1b.
Mounting Rotary Encoders with Codewheels
There are two orientations for mounting the Avago
Technologies encoder module and Avago Technologies
codewheel. Figure 1a shows mounting the module with
side A as the mounting plane. Figure 1b shows mount-
ing the module with side B as the mounting plane.
When assembling the encoder and codewheel, it is im-
portant to maintain the tolerances of Side A of the mod-
ule, and the image side of the codewheel. See module
Data Sheets for these tolerances.
HEDS-51X0 fig 1a
MODULE SIDE B
MODULE SIDE A
IMAGE SIDE
OF CODEWHEEL
IMAGE SIDE
OF CODEWHEEL MODULE SIDE A
MODULE SIDE B
5
Figure 2. Alignment Tool is Used to Set Height of Codewheel.
Assembly Instructions Using Avago Technologies Assembly Tools
Figure 3. Alignment Tool is Placed over Shaft and onto Codewheel Hub.
Alignment Tool Pins Mate with Aligning Recesses on Module.
3. Insert mounting screws through module and thread
into the motor base. Do not tighten screws.
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 t
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.
Instructions
1. Place codewheel on shaft.
2. Set codewheel height:
a. Place the correct gap setting tool (per Ordering
Information Table) on motor base, ush up against
the motor shaft as shown in Figure 2. The shim has
two dierent size steps. Choose the one that most
closely matches the width of the codewheel boss.
The 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.
CENTERING TOOL
CODEWHEEL
ALIGNING RECESSES
MODULE SIDE A
MODULE SIDE B
HEDS-51X0 fig 2
IMAGE SIDE OF CODEWHEEL
GAP SETTING SHIM
CODEWHEEL
MODULE SIDE A
MODULE SIDE B
6
Mechanical Drawings
Figure 4. HEDS-5120 Codewheel.
Figure 5. HEDS-6100 Codewheel.
Figure 6. HEDS-5140 Codewheel Used with HEDS-9140.
5.94
(0.234)
MAX.
12.70
(0.500)
MAX.
HEDS-51X0 fig 4
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
26.67
(1.050)
MAX.
HEDS-51X0 fig 5
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)
5.95
(0.234)
MAX.
12.70
(0.500)
MAX.
HEDS-51X0 fig 6
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
ROP = 11.00 mm (0.433 in.)
DIMENSIONS IN MM (INCHES)
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.
HEDS-51X0 fig 7
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
ROP = 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
8.5 MAX.
22.50
(0.886) MAX.
ARTWORK SIDE
(HEDM-6120)
ARTWORK SIDE
(HEDM-6121)
HEDS-51X0 fig 9
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)
HEDS-51X0 fig 10
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)
HEDS-51X0 fig 11
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)
HEDS-51X0 fig 12
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
0Option
Resolution
(Cycles/Rev)
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
Metal Codewheels
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDS-5120# A * * * * * * * * *
C * * * * * *
D *
E * *
F *
G * * * * * *
H * * * * *
I * * * * * *
K * *
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDS-5140 A * * * * * * * *
C * * * *
E * * * *
F * * *
G * * *
I * * * * * * *
HEDS-9140 Option
modules
HEDS-5140
codewheels
0
0Option
02 - 3 mm
03 - 1/8 in.
04 - 5/32 in.
05 - 3/16 in.
06 - 1/4 in.
Rop = 11 mm, 3
Channels
Assembly Tools
Centering Gap-Setting
HEDS- HEDS-
8905 8905
Resolution (Cycles/
Rev)
C - 100 CPR
E - 200 CPR
F - 256 CPR
G - 360 CPR
A - 500 CPR
I - 512 CPR
11 - 4 mm
14 - 5 mm
12 - 6 mm
13 - 8 mm
Shaft Diameter
10
HEDS-9000 Option
modules
HEDS-6100
codewheels
0
0Option
Shaft Diameter
06 - 1/4 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
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDS-6100# A * * *
B * * * *
Ordering Information (Cont’d.)
Note:
1. For the lower resolution, two channel encoders, (11 mm ≤ 512 CPR; 23.36 mm ≤ 1024 CPR) the centering tool and gap-setting shim are not
necessary, but sometimes helpful in an assembly process.
0
0Option HEDS-9040 Option
modules
HEDS-6140
codewheels
Resolution (Cycles/
Rev)
B - 1000 CPR
J - 1024 CPR
Shaft Diameter
06 - 1/4 in.
08 - 3/8 in.
09 - 1/2 in.
10 - 5/8 in.
11 - 4 mm
12 - 6 mm
13 - 8 mm
Rop = 23.36 mm, 3
Channels
Assembly Tools
Centering Gap-Setting
HEDS- HEDS-
8906 8906
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDS-6140# B * * * * * * *
J * * * *
11
Film Codewheels
HEDS-9100
modules
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
Shaft Diameter
02 - 3 mm
06 - 1/4 in.
11 - 4 mm
12 - 6 mm
Assembly Tools
Centering Gap-Setting
HEDS- HEDS-
8905 8901
Rop = 11 mm, 2
Channels
HEDM-512
codewheels
Option
Ordering Information (Cont’d.)
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
06 - 1/4 in.
08 - 3/8 in.
12 - 6 mm
13 - 8 mm
Assembly Tools
Centering Gap-Setting
HEDS- HEDS-
8906 8906
Rop = 23.36 mm, 2
Channels
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDM-6120# T * * * *
U *
HEDM-6121# T *
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDM-5120# B * * * *
J * *
HEDM-5121 B * *
J
12
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
Shaft Diameter
06 - 1/4 in.
14 - 5 mm
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
10 - 5/8 in.
12 - 6 mm
Assembly Tools
Centering Gap-Setting
HEDS- HEDS-
8906 8906
Rop = 23.36 mm, 3
Channels
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDM-6140# T *
HEDM-6141# T *
Ordering Information (Cont’d.)
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDG-5121# B * *
J *
HEDS-9000
modules
Option
HEDG-612
codewheels
Option
0
0
Resolution (Cycles/
Rev)
T - 2000 CPR
U - 2048 CPR
Assembly Tools
Centering Gap-Setting
HEDS- HEDS-
8906 8932
Rop = 23.36 mm, 2
Channels
Shaft Diameter
12 - 6 mm
Ordering Information (Cont’d.)
01 02 03 04 05 06 08 09 10 11 12 13 14
HEDG-6120# U *
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Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved. Obsoletes 5989-0866EN
AV02-1450EN - January 21, 2009
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