Siemens SINUMERIK 840Di sl Programming Manual page 390

Tool offsets
8.14 Tool length compensation for orientable toolholders (TCARR, TCOABS, TCOFR)
TCOFR
TCOFRZ
TCOFRY
TCOFRX
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; stored in system variables $TC_CARR13 and $TC_CARR14.
For a definition of toolholder kinematics with system variables, see
References: /PGA/Job Planning Programming Manual; Tool Offsets,
"Toolholder Kinematics".
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
It is possible to set the orientating toolholder such that command
• TCOFR or TCOFRZ points in Z direction.
• TCOFRY points in Y direction.
• TCOFRX points in X direction.
If there is a switchover between TCOFR and TCOABS, the tool length compensation is
calculated again.
Request toolholder, TCARR
With TCARR, the toolholder number m is requested with its geometry data (offset 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 parts program via the
corresponding system variables.
390
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, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals