Detailed description
2.4 Closed-loop control
Basic logic functions: Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
63
2.4.2
Parameter sets of the position controller
Six different parameters sets
The position control can operate with 6 different servo parameter sets.
They are used as follows
1.
Fast adaptation of the position control to altered machine characteristics during operation,
e.g., a gear change of the spindle.
2.
Matching the dynamics of an axis to another axis, e.g., during tapping.
Parameter set changeover
The following machine data can be changed by switching over the parameter set during operation:
Denominator load gearbox
MD31050 $MA_DRIVE_AX_RATIO_DENOM[n]
Numerator load gearbox
MD31060 $MA_DRIVE_AX_RATIO_NUMERA[n]
K
v
factor
MD32200 $MA_POSCTRL_GAIN[n]
Backlash compensation
MD32452 $MA_BACKLASH_FACTOR[n]
Feedforward control factor
MD32610 $MA_VELO_FFW_WEIGHT[n]
MD36012 $MA_STOP_LIMIT_FACTOR[n]
MD36000 $MA_STOP_LIMIT_COARSE
MD36010 $MA_STOP_LIMIT_FINE
Exact stop limits
and zero-speed window
MD36030 $MA_STANSTILL_POS_TOL
Equivalent time constant
current control loop for torque feedforward
control
MD32800 $MA_EQUIV_CURRCTRL_TIME[n]
Equivalent time constant
speed control loop for speed feedforward control
MD32810 $MA_EQUIV_SPEEDCTRL_TIME[n]
Time constant for dynamic response adaptation
MD32910 $MA_DYN_MATCH_TIME[n]
Threshold value for velocity monitoring
MD36200 $MA_AX_VELO_LIMIT[n]
Tapping or thread cutting
The following applies to parameter sets for axes:
•
For machine axes not involved in tapping or thread cutting, parameter set 1 (index=0) is
always used.
The further parameter sets need not be considered.
•
For machine axes involved in tapping or thread cutting, the same parameter set number
as for the current gear stage of the spindle is activated.
All parameter sets correspond to the gear stages and must therefore be parameterized.
The current parameter set is displayed in operating area "Diagnostics" in the "Service axis"
display. The parameter sets for gear stages 1 to 5 are referred to as interpolation
parameters.
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 ...