Modification Of The Offset Data For Rotatable Tools; Introduction - Siemens SINUMERIK 840D sl Function Manual

2.9

Modification of the offset data for rotatable tools

2.9.1

Introduction

Function
With function "Modification of the offset data for rotatable tools", the modified geometrical
relationships that result when a tool is rotated (predominantly turning tools, but also drilling and
milling tools) relative to the workpiece being machined can be taken into account.
The actual tool rotation is always determined from a currently active tool carrier with orientation
capability (see Chapter "Tool carriers with orientation capability (Page 95)") or from an
orientation transformation defined with kinematic chains (see Function Manual Special
Functions; Chapter "Transformation definition with kinematic chains").
The angle of rotation of the tool carrier with orientation capability is normally (but not
necessarily) defined with the TCOFR command from an active frame. This method can be used
to define the tool orientation independently of the actual kinematics with which the tool is
rotated, identically in each case with the help of two angles.
In an active kinematic transformation, the required angles can be determined with the function
ORISOLH (see "Calculating orientations (ORISOLH) (Page 153)").
The two machine-independent orientation angles β (Beta) and γ (Gamma) are used to define
the tool rotation. β is the angle of rotation and the applicate (typically a B axis in G18) and γ a
rotation around the abscissa (Typically a C axis in G18). The rotation is first executed around
Y, finally around β. I.e., the γ axis is rotated by the β axis:
①
②
Figure 2-40
Commissioning
The function is commissioned using the machine and setting data.
See Section "Commissioning (Page 150)".
Tools
Function Manual, 06/2019, A5E47435126B AA
Rotation around the abscissa
Rotation around the applicate
Tool rotation
2.9 Modification of the offset data for rotatable tools
W1: Tool offset
141