Linear encoders – HEIDENHAIN NPD 281 v.3 User Manual
Page 25
25
Linear Encoders
The ND 281 and NDP 181 display units are intended
for use with photoelectrical encoders with
sinusoidal signals — 11 µA
PP
or 1 V
PP
.
ND 281 A, 11 µA
PP
: Id. Nr. 283 481 ..
ND 281 V, 1 V
PP
:
Id. Nr. 322 353 ..
NDP 281, 11 µA
PP
: Id. Nr. 289 214 ..
Display step with linear encoders
The display step depends on the signal period of
the encoder and the subdivision of the encoder
signals.
You can select a specific display step by adapting
the following operating parameters:
• Subdivision (P32)
• Counting mode (P33)
• Decimal places (P38)
Example
Linear encoder with a signal period of 10 µm
Desired display step ................ 0.000 5 mm
Subdivision (P32) ..................... 20
Counting mode (P33) ............... 5
Decimal places (P38) ............... 4
The tables on this page and on the next will help
you to select the appropriate parameter settings.
Display step, signal period and subdivision for linear encoders
Signal period [µm]
Display step
2
4
10
20
40
100 200 12 800
[mm]
[inches]
P32: Subdivision
0.000 005 0.000 000 2 400
–
–
–
–
–
–
–
0.000 01
0.000 000 5 200
–
–
–
–
–
–
–
0.000 02
0.000 001
100
–
–
–
–
–
–
–
0.000 05
0.000 002
40
80
–
–
–
–
–
–
0.000 1
0.000 005
20
40
100 200
–
–
–
–
0.000 2
0.000 01
10
20
50 100
–
–
–
–
0.000 5
0.000 02
4
8
20
40
80
–
–
–
0.001
0.000 05
2
4
10
20
40
100
–
–
0.002
0.000 1
1
2
5
10
20
50
100
–
0.005
0.000 2
0.4
0.8
2
4
8
20
40
–
0.01
0.000 5
0.2
0.4
1
2
4
10
20
–
0.02
0.001
–
–
0.5
1
2
5
10
–
0.05
0.002
–
–
0.2
0.4
0.8
2
4
256
0.1
0.005
–
–
0.1
0.2
0.4
1
2
128
0.2
0.01
–
–
–
–
–
–
–
64
Linear Encoders