Example: Linear Axis With Rotary Encoder On Motor - Siemens SINUMERIK 840D Function Manual

G2: Velocities, setpoint / actual value systems, closed-loop control
2.4 Setpoint/actual-value system
2.4.6.3

Example: Linear axis with rotary encoder on motor

Figure 2-5
The ratio of the internal increments to the encoder increments per mm is calculated as follows:
Example
Assumptions:
● Rotary encoder on the motor: 2048 pulses/revolution
● Internal pulse multiplication: 2048
● Gearbox, motor / ball screw: 5:1
● Leadscrew pitch: 10 mm/revolution
● Computational resolution: 10000 increments per mm
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Linear axis with rotary encoder on motor
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA