Siemens SINUMERIK 808D ADVANCED Parameter Manual page 248

Machine data
3.4 Axis-specific machine data
Description:
MD32630 $FFW_ACTIVATION_MODE can be used to define whether the feedforward control for
this axis/spindle can be switched on and off by the part program.
0 =
elements FFWON and FFWOF respectively.
For the axis/spindle, the state specified by MD32620 $MA_FFW_MODE is therefore always
effective.
1 =
FFWON and FFWOF respectively.
The instruction FFWON/FFWOF becomes active immediately
2 =
FFWON and FFWOF respectively.
The instruction FFWON/FFWOF does not become active until the next axis standstill
The default setting is specified by the channel-specific MD20150
$MC_GCODE_RESET_VALUES. This setting is valid even before the first NC block is
executed.
Notes:
The last valid state continues to be active even after Reset (and therefore also with
JOG).
As the feedforward control of all axes of the channel is switched on and off by FFWON
and FFWOF respectively, MD32630 $MA_FFW_ACTIVATION_MODE should be set identically for
axes interpolating with one naother.
Switching feedforward control on or off while the axis/spindle is traversing may cause
compensation operations in the control loop. Interpolating axes are therefore stopped
by the part program if such switching operations occur (internal stop Stop G09 is
triggered).
Related to:
MD32620 $MA_FFW_MODE
MD20150 $MC_GCODE_RESET_VALUES
32640 STIFFNESS_CONTROL_ENABLE
- Dynamic stiffness control
CTEQ
808d-me42 1
808d-me62 1
808d-te42 1
808d-te62 1
808d-mte40 1
808d-mte60 1
Description:
Activate dynamic stiffness control, if bit is set.
Higher servo gain factors are possible if stiffness control is active (MD32200
$MA_POSCTRL_GAIN).
Notes:
The availability of this function is determined by the drive used (the drive has to
support the DSC function).
Note on PROFIdrive drives:
Alarm 26017 refers to this machine data if:
a. The PROFIdrive telegram used (see MD13060 $MN_DRIVE_TELEGRAM_TYPE) does not
support the DSC function or does not contain an encoder 1 (such as Tel. 118), to which
the DSC scaling for PZD XERR refers. Remedy: Use a sufficiently powerful telegram
which also includes encoder 1 (e.g. Tel. 106, 116).
248
The feedforward control cannot be switched on or off by the high-level language
The feedforward control can be switched on and off by the part program with
The feedforward control can be switched on and off by the part program with
FALSE
TRUE
FALSE
TRUE
FALSE
FALSE
A01, A07
BOOLEAN
0 -
0 -
0 -
0 -
0 -
0 -
Parameter Manual, 08/2015, 6FC5397-8EP40-0BA1
TE3, G2
NEW CONF
ReadOnly
1/1
ReadOnly
1/1
7/2
7/2
Parameter Manual