HEDS-51X0 Datasheet, PDF (4/15 Pages) Agilent(Hewlett-Packard) – Two and Three Channel Codewheels for Use with Agilent Optical Encoder Modules

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
HEDS-51XX
HEDS-61XX
HEDM-512X
HEDM-61XX
HEDG-512X
HEDG-612X
Description
Cycle Error
Position Error
Cycle Error
Position Error
Cycle Error
Position Error
Cycle Error
Position Error
Cycle Error
Position Error
Cycle Error
Position Error
Symbol
∆C
∆θ
∆C
∆θ
∆C
∆θ
∆C
∆θ
∆C
∆θ
∆C
∆θ
Min.
Typ.
3
10
3
7
3
4
3
2
3
4
3
2
Max.
5.5
40
5.5
20
7.5
40
7.5
20
7.5
30
7.5
15
Units
°e
min. of arc
°e
min. of arc
°e
min. of arc
°e
min. of arc
°e
min. of arc
°e
min. of arc
Reliability
In addition to the absolute
maximum specifications of
codewheels, 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
Storage at 100°C
Rotating at 100°C
Temperature Cycle: -40°C to +100°C
Temperature/Humidity: 85°C/85% R.H.
Duration
1000 hours
500 hours
500 cycles
500 hours
Number of Parts
44
10
98
43
Number of Failures
0
0
0
0
Film Codewheel Tests
Test
Storage at 70°C
Rotating at 70°C
Temperature Cycle: -40°C to +70°C
Temperature Cycle: +20°C to +40°C
Temperature Cycle: +20°C to +55°C
Temperature Cycle: +20°C to +70°C
Duration
1000 hours
500 hours
500 cycles
1000 cycles
1000 cycles
500 cycles
Number of Parts
118
10
66
64
46
50
Number of Failures
0
0
0
0
0
0