HEIDENHAIN PT 855 for Turning - Manual (Page 68)

II - 3 Encoders and Measured Value Display
70 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] x 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 – – – – – – – 64