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 oers 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 oers 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 oer 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, oering a temperature rating of 100°C
and resolutions to 1024 CPR on a 28 mm diameter.
In addition, each material oers a specic reliability rat-
ing. It is important to consider the specic 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 Eective
• 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 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 oer higher resolution capabilities. Film codewheels
allow higher resolution, but cannot endure the same
temperatures and high humidity as metal. Glass code-
wheels oer 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 specications and output load recommendations.
*HEDM-6140 is guaranteed to 100 kHz with the HEDS-9040 #T00 module.