Siemens SINUMERIK 840D sl, Function Manual

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Detailed Description
2.5 Toolholder with orientation capability
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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2.5 Toolholder with orientation capability
2.5.1 General
Introduction
The orientation of the tool can vary (e.g., due to retooling) for a single class of machine tools.
When the machine is operating, the orientation that has been set is permanent, however,
and cannot be changed during traversing. For this reason, kinematic orientation
transformation (3-, 4- or 5axis transformations,
TRAORI
) is neither necessary nor does it
make sense for such machines. However, it is necessary to take account of the changes in
the tool length components caused by changing the orientation, without having to trouble the
user with mathematics involved. The control performs these calculations.
Required data
The following requirements must be met if the control is to take tool compensations into
account for toolholders with orientation capability:
•
Tool data (geometry, wear, etc.)
•
Toolholder data (data for the geometry of the toolholder with orientation capability)
Toolholder selection
A toolholder defined in the control must be specified for the "Toolholder with orientation
capability" function. The NC program command below is used for this purpose:
TCARR = m
m: Number of the toolholder
The toolholder has an associated toolholder data block, which describes its geometry.
Activating the toolholder and its block has an immediate effect, i.e., from the next traversing
block onwards.
Assignment tool/toolholder
The tool that was active previously is assigned to the new toolholder.
From the point of view of the control, toolholder number m and tool numbers T can be
combined freely. In the real application, however, certain combinations can be ruled out for
machining or mechanical reasons. The control does not check whether the combinations
make sense.