Siemens SINUMERIK 828D

G2: Velocities, setpoint / actual value systems, closed-loop control
7.4 Setpoint/actual-value system
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
367
Linear axis with linear scale
Figure 7-4 Linear axis with linear scale
In order to adapt the actual-value resolution to the calculation resolution, the control calculates the quotients from
the "internal increments/mm" and the "encoder increments/mm" as follows:
The distance for linear encoders is based on the pulse increments.
Linear axis with rotary encoder on motor
Figure 7-5 Linear axis with rotary encoder on motor
In order to adapt the actual-value resolution to the calculation resolution, the control calculates the quotients from
the "internal increments/mm" and the "encoder increments/mm" as follows:
SINUMERIK example
Linear axis with rotary encoder (2048 Impulse) on motor;
internal multiplication (2048)
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Internal increments / mm
=
ENC_GRID_POINT_DIST [n] * INT_INCR_PER_MM
ENC_PULSE_MULT[n]
=
=
n
n
n
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