Siemens SINUMERIK 840D sl Function Manual page 1905

Selecting the toolholder
A toolholder with number m is selected with the NC program command TCARR = m (TCARR
Tool Carrier).
TCARR = 0 deselects an active toolholder.
New tool or new toolholder
When a new tool is activated, it is always treated as if it was mounted on the active
toolholder.
A new toolholder is activated immediately when it is programmed. It is not necessary to
change tools or reprogram the active tool. The toolholder (number) and tool (number) are
independent and can be used in any combination.
Toolholder from G code of group 42
Absolute tool orientation TCOABS (Tool Carrier Orientation ABSolute):
Tool orientation is determined explicitly if the corresponding values are entered in system
variable $TC_CARR13 or $TC_CARR14 and G code TCOABS is activated in G-code group
42.
Frame tool orientation TCOFR (Tool Carrier Orientation FRame):
Tool orientation can also be determined automatically from the current orientation of an
active frame when selecting a tool, if one of the following G codes is active in G-code group
42 when the toolholder is selected:
• TCOFR or TCOFRZ
• TCOFRX
• TCOFRY
The effect of TCOFR is such that, when machining on an inclined surface, tool
compensations are considered implicitly as if the tool were standing vertically on the surface.
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
The toolholder with orientation capability is set so that the tool points in the Z direction.
The toolholder with orientation capability is set so that the tool points in the X direction.
The toolholder with orientation capability is set so that the tool points in the Y direction.
Detailed Description
2.5 Toolholder with orientation capability
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