Positioning Accuracy Of The Control System; Input/Display Resolution, Computational Resolution - Siemens SINUMERIK 840D Function Manual

G2: Velocities, setpoint / actual value systems, closed-loop control
2.2 Velocities, traversing ranges, accuracies
R2: Rotary axes (Page 221)
2.2.3

Positioning accuracy of the control system

Actual-value resolution and computational resolution
The positioning accuracy of the control depends on the actual-value resolution (=encoder
increments/(mm or degrees)) and the computational resolution (=internal increments/(mm or
degrees)).
The coarse resolution of these two values determines the positioning accuracy of the control.
The input resolution, interpolator and position-control cycle selections have no effect on this
accuracy.
As well as limiting using MD32000, the control limits the maximum path velocity in relation to
the situation and according to the following formula:
2.2.4

Input/display resolution, computational resolution

Resolutions: Differences
Resolutions, e.g. resolutions of linear and angular positions, velocities, accelerations and jerk,
must be differentiated as follows:
● Input resolution
Data is input via the control panel or part programs.
● Display resolution
Data is displayed via the control panel.
● Computational resolution
Data input via the control panel or part program is displayed internally.
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Axes and spindles
Function Manual, 06/2019, A5E47437747B AA