Siemens SINUMERIK 840DE sl Function Manual page 268

K12 transformation definitions with kinematic chains
4.1 Function description
Slot side offset
In connection with bit 9 = 1, you can set whether TRACYL is operated with or without slot side
offset upon activation of the transformation via TRAFOON. "Slot side active" corresponds to
transformation type 514.
If you are working with slot side offset, $NT_GEO_AX_NAME[n,1] must contain a reference to
a linear axis (slot side offset axis).
The following settings via $NT_CNTRL are possible with bit 9 and bit 10:
Bit 10 Bit 9
0 0
0 1
1 0
1 1
Work offset of the rotary axis
Setting is done via the system variable $NT_ROT_OFFSET_FROM_FRAME (Page 294). If a
value is defined in the system variable, then the programmed offset is automatically imported
upon switch-on from the work offset that is active for orientation axes:
Importing the rotary axis offset from the work offset upon selection of the transformation:
● 0 = Axial offset of the rotary axis is not taken into account.
● 1 = axial offset of the rotary axis is taken into account.
● 2 = Axial offset of the rotary axis is taken into account up to the SZS. SZS is the settable zero
system. The SZS frames contain transformed rotations around the rotary axis.
Definition of the last element in the kinematic chain
$NT_CNTRL Bit 19 is used to define that the last element of the kinematic chain is a rotary axis
or a constant rotation. The direction vector of the rotary axis defines the Z direction of the tool
coordinate system. If the system variable $NK_A_OFF of this chain element contains a value
not equal to zero, the tool coordinate system is also rotated about the coordinate axis with this
angle.
If $NT_CNTRL Bit 20 is also defined, the sign of the Z direction of the axis for the determination
of the WCS is inverted.
Example program for TRACYL
You will find a simple part program using TRACYL under Part program for TRACYL (Page 335).
268
Description
TRACYL without slot side offset
TRACYL with slot side offset
TRACYL with the capability of switching between the functions with and without slot side offset
via a transformation parameter upon activation of the transformation (TRAFOON). The slot
side offset is inactive by default.
TRACYL with the capability of switching between the functions with and without slot side offset
via a transformation parameter upon activation of the transformation (TRAFOON). The slot
side offset is active by default.
Function Manual, 06/2019, A5E47435470B AA
Transformations