HEIDENHAIN PT 855 for Milling User Manual
Page 96
II - 3 Encoders and Measured Value Display
94
Technical Information
POSITIP 855
Setting the display step with linear encoders
With linear encoders, the display step depends on the
signal period of the encoder (P31.*) and the
linear subdivision (P32.*).
Both parameters are entered separately for each axis. The linear
subdivision can range from 0.1 to 128 depending on the signal
period of your encoder.
For linear measurement using nut/ballscrew arrangements and
rotary encoders, calculate the signal period as follows:
Signal period [µm] = Drivescrew pitch [mm] · 1000
Line count
Display step, signal period and linear subdivision for linear encoders
Signal period [µm]
2
4
10
20
40 100 200 12 800
Display step
[mm]
[inch]
Linear subdivision
0.000 02
0.000 001 100
0.000 05
0.000 002
40
80
0.000 1
0.000 005
20
40 100
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
0.1
0.005
0.1
0.2
0.4
1
2
128
0.2
0.01
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