7
Encoding Characteristics
Encoding Characteristics over Recommended Operating Range and Recommended Mounting Tolerances
unless otherwise specified. Values are for the worst error in the full rotation.
Part Number
Description
Symbol
∆P
∆S
∆Φ
∆Θ
∆C
∆P
∆S
∆Φ
∆Θ
∆C
∆P0
Min.
Typ.*
5
5
2
7
5
5
5
2
7
5
90
Max.
35
35
15
20
5.5
35
35
15
20
5.5
125
Units
e
e
e
min. of arc
e
e
e
e
min. of arc
e
e
HEDS-6500*** Pulse Width Error
Logic State Width Error
Phase Error
Position Error
Cycle Error
HEDS-6540**
Pulse Width Error
Logic State Width Error
Phase Error
Position Error
Cycle Error
Index Pulse Width
CH I fall after CH B or CH A fall
-25°C to +100°C
-40°C to +100°C
CH I rise after CH B or CH A rise
-25°C to +100°C
-40°C to +100°C
HEDL-654x
Pulse Width Error
Logic State Width Error
Phase Error
Position Error
Cycle Error
Index Pulse Width
55
t1
t1
10
-300
100
100
250
250
ns
ns
t2
t2
∆P
∆S
∆Φ
∆Θ
∆C
∆P0
70
70
150
150
5
5
2
7
5
90
300
1000
35
35
15
20
5.5
ns
ns
e
e
e
min. of arc
e
e
*Typical values specified at Vcc = 5.0 V and 25°C.
**HEDS-6540 – Active high Index part. Pull-up of 2.7 kΩ used on all outputs of modules that do not have a line driver.
***HEDS-6500 – 3.3 kΩ pull-up resistors used on all encoder module outputs.
HP [ AGILENT(HEWLETT-PACKARD) ]
