Siemens Sinumerik 840D sl Programming Manual page 452

Tool offsets
7.9 Tool length compensation for orientable toolholders (TCARR, TCOABS, TCOFR, TCOFRX, TCOFRY,
Significance
TCARR=[<m>]:
TCOABS:
TCOFR:
TCOFRZ:
TCOFRY:
TCOFRX:
Further Information
Determine tool length compensation from the orientation of the toolholder (TCOABS)
TCOABS calculates the tool length compensation from the current orientation angles of the
toolholder; saved in the system variables $TC_CARR13 and $TC_CARR14.
For a definition of toolholder kinematics with system variables, see " Tool holder kinematics
[Page 445] ".
In order to make a new calculation of the tool length compensation when frames are changed,
the tool has to be selected again.
Tool direction from active frame
The toolholder with orientation capability is set so that the tool points in the following
directions.
• with TCOFR or TCOFRZ in the Z direction
• with TCOFRY in the Y direction
• with TCOFRX in the X direction
The tool length compensation is re-calculated when changing over between TCOFR and
TCOABS.
Request toolholder (TCARR)
With TCARR, the toolholder number m is requested with its geometry data (compensation
memory).
With m=0, the active toolholder is deselected.
The geometry data of the toolholder only become active after a tool is called. The selected
tool remains active after a toolholder change has taken place.
The current geometry data for the toolholder can also be defined in the part program via the
corresponding system variables.
452
Request toolholder with the number "m"
Determine tool length components from the orientation of the current
toolholder
Determine tool length components from the orientation of the active
frame
Orientable toolholder from active frame with a tool pointing in the Z
direction
Orientable toolholder from active frame with a tool pointing in the Y
direction
Orientable toolholder from active frame with a tool pointing in the X
direction
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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