Siemens SINUMERIK 840D sl Function Manual page 576

TE1: Clearance control - 840D sl only
15.5 Startup
4. The direction axes may not participate in an axis coupling, e.g. transformation, electronic
gear, etc.
5. To ensure that the dynamic response of the path is not limited by the dynamic response of
the direction axes, the following machine data for the direction axes must be set equal to
or more than the corresponding values of the geometry axes of the channel:
– MD32000 $MA_MAX_AX_VELO[x] (maximum axle velocity)
– MD32200 $MA_POSCTRL_GAIN[x] (Kv factor)
– MD32230 $MA_MAX_AX_ACCEL[x] (position controller structure configuration)
The following machine data is used to specify which channel axis is the direction axis:
● MD62528 $MC_CLC_PROG_ORI_AX_MASK (progr. orientation vector: axis mask)
Each machine data bit corresponds to a channel axis.
● Coordinate X = channel axis corresponding to bit a
● Coordinate Y = channel axis corresponding to bit b
● Coordinate Z = channel axis corresponding to bit c
with a < b < c
Current difference angle
The difference angle is the angle between the tool orientation vector and the compensation
vector. If the current difference angle of the clearance control is to be output in a system
variable $AC_PARAM[n], index n of the system variable should be entered in the following
machine data:
MD65530 $MC_CLC_PROG_ORI_ANGLE_AC_PARAM ()
Permissible limit angle
The permissible limit angle specifies the maximum difference angle allowed between the tool
orientation vector and the compensation vector. The limit angle is configured via the following
machine data:
MD65520 $MC_CLC_PROG_ORI_MAX_ANGLE ()
576
x = axle number
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions