num parameter manual - Documentation CN

P10 P11 P12 P13 P25 P26 P34 P36
Example
P36, word 32-63: N graduations
Axis 0 is equipped with a Heidenhain LS 776C rule with encoded reference marks = EXE 612.
Manufacturer data:
- multiplier due to EXE: Exe = 10
- rule graduated every 20 μm: P = 20 (graduation)
- law applied: 1000*P, i.e. N = 1000 (number of graduations).
Measurement
If the internal resolution unit is the micrometre and if the measurement increments are not multiplied or divided by the
machine kinematics, k = 1.
P11= 20 1
=
4 ⋅10 2
P36, word 0 = 20*2 = 40
P36, word 32 = 1000
5.9.2 Combined Sensor: Incremental and SSI
Word 00-31: Numerator of the ratio
Word 32-63: Denominator of the ratio
Conventional Case
Value of the SSI step
Value of the incremental step
Value of the SSI step
Value of the incremental step
The incremental measurement uses an IBV unit which generates square signals. This unit generally has a multiplier.
If there is no IBV, set words 00-31 to 1 (default value).
The SSI measurement is applied directly to the axis card.
Example
The Heidenhain ROC 413 encoder outputs frames of 13 bits and 1024 * 4 periods.
This encoder is connected via an IBV with a multiplier of 10.
For instance, if each encoder revolution corresponds to a distance of 10 mm, increment P11 is determined as follows:
1024p * 4 * 10 ibv * MULTI = 10 * 1000 μ
DIVI
MULTI 1000 250
= =
DIVI 1024 *4 1024
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