Siemens SINUMERIK 840Di Function Manual page 1763

CUT3DC and CUT3DF
3D tool compensation for circumferential milling
3D tool compensations for face milling with active 5-axis transformation are not affected by
the "Toolholder with orientation capability" function.
The orientation information is determined by the active kinematic 5-axis transformation.
Limited toolholder orientation
An alarm is output if an orientation that cannot be reached with the defined toolholder
kinematic is specified by the frame.
The following kinematics cannot achieve any orientation:
• If the two rotary axes, which are necessary to define the kinematic, are not perpendicular
• Fewer than two axes have been defined.
Non-rotary toolholders
The tool orientation used internally is dependent only on the basic orientation of the tool and
the active plane (G17 - G19).
Ambiguities
With two axes, a particular tool orientation defined by the frame can generally be set with two
different rotary angle pairs. Of these two, the control selects the setting with which the rotary
angle is as close as possible to the programmed rotary angle.
Storing angles in the toolholder data
In virtually any case where ambiguities may arise, it is necessary to store the approximate
angle expected from the frame in the toolholder data.
Parameter sets
A complete set of parameters for a toolholder with orientation capability consists of 33
values.
The following system variables are available:
• $TC_CARR1 to $TC_CARR33
• In addition, $TC_CARR34 to $TC_CARR65 are freely available for the user and for fine
The meaning of the individual parameters is distinguished as follows:
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
to each other and if the tool axis, which defines the tool direction, does not stand
perpendicular to the second rotary axis
Or
offsets.
Detailed Description
2.5 Toolholder with orientation capability
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