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 Features:
Codewheels Available in Glass, Film, and Metal
Avago Technologies offers a wide variety of codewheels
for use with Avago Technologies HEDS-9000, HEDS-
Available in Two Standard Diameters
9100, HEDS-9040, and HEDS-9140 series Encoder Mod-
Cost Effective
ules. Designed for many environments, applications,
Resolutions from 96 CPR to 2048 CPR
and budgets, Avago Technologies codewheels are avail-
able in Glass, Film, and Metal. These codewheels are
For Use with HEDS-90XX/91XX Series Two and Three
available in resolutions from 96 Counts Per Revolution
Channel Encoders
(CPR) to 1024 CPR on an 11 mm optical radius and 500
Lead Free
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 temperature rating up to 100C, 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 tem-
perature of 70C. Glass codewheels combine the best of
film and metal, offer ing a temperature rating of 100C
and resolutions to 1024 CPR on a 28 mm diameter.
In addition, each material offers a specific reliability rat -
ing. It is important to consider the specific 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 SheetAbsolute 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 code-
wheels offer both high temperature and higher resolu -
tion, but are also more expensive. Consider the follow-
ing rating table when choosing a codewheel material.
HEDS-XXXX HEDM-XXXX HEDG-XXXX
Parameter Symbol Metal Codewheels Film Codewheels Glass Codewheels
Storage T -40C to +100C -40C to +70C -40C to +100C
S
Temperature
Operating T -40C to +100C -40C to +70C -40C to +100C
A
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
2 2 2
Acceleration 250,000 Rad/Sec 250,000 Rad/Sec 100,000 Rad/Sec
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 specifications and output load recommendations.
*HEDM-6140 is guaranteed to 100 kHz with the HEDS-9040 #T00 module.
2