Automatic Tool Protection Areas - Siemens SINUMERIK 840D sl Function Manual

K8: Geometric machine modeling - only 840D sl
6.1 Function description
6.1.2

Automatic tool protection areas

Unlike machine protection areas whose geometry is defined once during the machine modeling
and then no longer changes, the geometry of a tool protection area can change with every tool
change. As a result the geometry of an automatic tool protection area is not described directly
when the machine model is created, and instead the address (magazine number, magazine
location, etc.) is provided under which the tool data is stored. The following actions are then
carried out automatically by the control.
1. The tool modeling (see "Tool modeling" section below) produces an STL file.
2. A protection area element of the "FILE" type is produced and assigns the STL file.
3. The protection area element is assigned to the protection area (type "TOOL").
Tool definition independent of the tool mounting position
Normally the parameter "$NP_1ST_PROT (Page 225)" remains empty for the definition of a
tool protection area. The name of the protection area element is only entered when the tool is
activated by the control (see above).
In order for there to be a tool definition independently of the tool mounting position, a protection
area element of the "FRAME (Page 240)" type can be assigned via the parameter
"$NP_1ST_PROT" (transformation element). The transformations to align the tool can be
carried out via this additional element. When a tool is activated the name of the internal
protection area element is entered in the parameter "$NP_NEXT (Page 234)" of the
transformation element by the control.
The following rules must be observed:
● The transformation element may only be of the "FRAME" type.
● Only one transformation element may be used for each tool protection area.
● The parameter "$NP_NEXTP" of the transformation element is not evaluated.
Tool reference point
The position of the tool reference point in the machine model is determined by the kinematic
element to which the tool protection area is assigned. In addition the tool reference point can
be offset within the tool protection area by an optional transformation element.
Kinematic transformations
The tool reference point may only be determined via the kinematic chain when defining a
kinematic transformation. Offsets by the transformation element of the tool protection area are
not taken into account.
NOTICE
Determination of the tool reference point for kinematic transformations
Offsets of the tool reference point by the transformation element of the tool protection area
are not taken into account by kinematic transformations.
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions