Detailed Description
2.5 Toolholder with orientation capability
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-103
All other tool compensation types:
The behavior for all other tool compensation types is unchanged.
For CUT2DF and CUT3DFF in particular, the compensation plane used for TRC is determined
from the active frame, independent of the current tool orientation. Allowance is made for the
active plane (G17 - G19) and the behavior is, therefore, the same as before.
The two remaining G codes of group 22, CUT3DC and CUT3DF, are not affected by the
toolholder functionality because the tool orientation information in these cases is made
available by the active kinematic transformation.
Two rotary axes
Two general solutions exist for two rotary axes. The control itself chooses these two solution
pairs such that the orientation angles resulting from the frame are as close as possible to the
specified angles.
The two following options are available for specifying the angles:
1. If $TC_CARR21 or $TC_CARR22 contains a reference to a rotary axis, the position of
this axis at the start of the block in which the toolholder is activated is used to specify the
angle.
2. If $TC_CARR21 or $TC_CARR22 does not contain a reference to a rotary axis, the
values contained in $TC_CARR13 or $TC_CARR14 are used.
Example
The control first calculates an angle of 10 degrees for one axis. The specified angle is 750
degrees. 720 degrees (= 2 * 360 degrees) are then added to the initial angle, yielding a final
angle of 730 degrees.
Rotary axis offset
Rotary axis offsets can be specified with system variables $TC_CARR24 and $TC_CARR25.
A value not equal to zero in one of these parameters means that the initial state of the
associated rotary axis is the position specified by the parameter (and not position zero). All
angle specifications then refer to the coordinate system displaced by this value.
When the machining plane is changed (G17 - G19), only the tool length components of the
active tool are interchanged. The components of the toolholder are not interchanged. The
resulting tool length vector is then rotated in accordance with the current toolholder and, if
necessary, modified by the offsets belonging to the toolholder.
The two toolholder angles α
1
and α
2
are determined using a frame, independent of the active
plane currently selected (G17 - G19).
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