Detailed description
2.3 Setpoint /actual-value system
Basic logic functions: Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
49
2.3.6
Actual-value processing
Actual-value resolution
In order to be able to create a correctly closed position control loop, the control system must
be informed of the valid actual-value resolution. The axis-specific machine data below are
used for this.
The control calculates the actual-value resolution from the settings made in the MD. The
control parameter sets of the position control are identified as servo parameter sets.
The machining process of the machine forms the basis of the position actual-value
acquisition.
Direct measuring system (DM) is on machine directly:
Load-side encoder
Indirect measuring system (IM) is on motor indirectly:
Motor-side encoder
Depending on the type of axis (linear axis, rotary axis) and the type of actual-value
acquisition (directly at the machine, indirectly at the motor), the following machine data must
be parameterized to calculate the actual-value resolution:
Machine data
Linear axis
Linear axis
Rotary axis
Linear scale/
or as direct
measuring
system
Encoder
on
motor
Encoder
on
machine
and/or tool
Encoder
on
motor
Encoder
on
machine
and/or tool
MD30300 $MA_IS_ROT_AX
0
0
0
1
1
MD31000 $MA_ENC_IS_LINEAR[n]
MD31010 $MA_ENC_GRID_POINT_DIST[n]
MD34320 $MA_ENC_INVERS[n]
1
Spacing
Opposite
direction
0
-
-
0
-
-
0
-
-
0
-
-
MD31040 $MA_ENC_IS_DIRECT[n]
- / (1)
0
1
0
1
MD31044 $MA_ENC_IS_DIRECT2[n]
- / (1)
0
1
0
1
MD31020 $MA_ENC_RESOL[n]
-
Pulses/
rev
Pulses/
rev
Pulses/r
ev
Pulses/
rev
MD31030 $MA_LEADSCREW_PITCH
-
mm/rev.
mm/rev.
-
-
MD31050 $MA_DRIVE_AX_RATIO_DENOM[n]
-
Load rev.
-
Load
rev.
See
note
MD31060 $MA_DRIVE_AX_RATIO_NUMERA[n]
-
Motor
rev. if infeed
gear
available
-
Motor
rev.
See
note
MD31070 $MA_DRIVE_ENC_RATIO_DENOM[n]
-
Encoder rev. Encoder
rev.
Encoder
rev.
Encoder
rev.
MD31080 $MA_DRIVE_ENC_RATIO_NUMERA[n]
-
Motor-
side encoder*
Motor
rev.
Motor
rev.
Load
rev.
-
= Does not apply to this combination
*
The encoder on the motor side is a built-in encoder and, therefore, does not have a measuring gear unit.
The transmission ratio is always 1:1.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...