Programming; Calculating Orientations (Orisolh) - Siemens SINUMERIK 840D sl Function Manual

SD42998 = 5.0 ⇒ The tool insert must not be turned by more than 5° away from the machining
plane.
Note
SD42998 = 0
If SD42998 $SC_CUTMOD_PLANE_TOL is set to "0", variations of up to 89° are permissible!
Difference between tool tip plane and machining plane for ORISOLH
The maximum permissible angle through which the tool insert can be turned away from the
machining plane when function ORISOLH (Page 161) is called is set in the setting data:
SD42999 $SC_ORISOLH_INCLINE_TOL
2.9.5

Programming

2.9.5.1

Calculating orientations (ORISOLH)

The predefined ORISOLH function helps the user to set the rotary axis positions of a machine
so that a turning tool can be brought into a defined, kinematic-independent position relative to
the workpiece. Prerequisite is that a 6-axis transformation is active that has been
parameterized with kinematic chains.
Two basic functions are available:
● Tool alignment
The β and γ angles are specified. The function calculates the angles of the three orientation
axes required for this.
● Direct tool alignment
The angles of the second and third orientation axes are specified. The function calculates
the associated β and γ angles as well as that of the missing first orientation axis.
Note
Order of the orientation axes
If you run through the kinematic chain that describes the structure of the machine, from the
workpiece to the tool, then the following specifications apply for the order of the three
orientation axes of a 6-axis transformation:
● The orientation axis that is closest to the workpiece is the first orientation axis.
● The orientation axis that is closest to the tool is the third orientation axis.
Generally, the first orientation axis is a spindle and the corresponding rotation is therefore
implemented in these cases through a rotating frame.
Tools
Function Manual, 06/2019, A5E47435126B AA
2.9 Modification of the offset data for rotatable tools
W1: Tool offset
153