Siemens sinumerik 840D sl Function Manual page 528

2.5.5 Parameters of the programmable compensation vector
Reference coordinate system
The programmable compensation vector specifies the direction in which the compensation
movement of the clearance control takes place. The compensation vector always refers to
the basic coordinate system (machine coordinate system).
The start coordinates [Xa, Ya, Za] of the compensation vector coincide with the origin of the
basic coordinate system and are thus always [0, 0, 0].
The end coordinates [Xe, Ye, Ze] of the compensation vector are determined by the actual
positions of 3 channel axes, known as the direction axes.
Direction axes
The direction axes must meet the following conditions:
1. The direction axes must be channel axes of the channel in which the clearance control is
2. The direction axes must be linear axes.
3. [mm] or [inch] must be selected as the unit of measurement for the direction axes.
4. The direction axes may not participate in an axis coupling, e.g. transformation, electronic
5. To ensure that the dynamic response of the path is not limited by the dynamic response
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.
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
activated.
Note:
Since the direction axes are only used to interpolate the direction components, they do
not need mechanical axes and can therefore be configured as simulation axes.
gear, etc.
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)
x = axle number
Detailed description
2.5 Startup
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