Siemens SINUMERIK 840D sl Function Manual page 216

K8: Geometric machine modeling - only 840D sl
6.1 Function description
Tool type-dependent model generation
The following tool types are distinguished for the model generation:
● Milling tool and all other tools that are neither turning tools or grinding tools
– Modeling
– Positioning
● Grinding tools
– Modeling
– Positioning
● Turning tools
In the case of turning tools only the cutting tips are taken into account in the machine model
but not their connection to the tool reference point.
The following data is taken into account when modeling a cutting tip:
– Tool type
– Cutting edge position
– Cutting edge radius
– Clearance angle
– Holder angle
– Cutting tip length
– Cutting tip width
– Tip thickness (assumption: tip thickness = 10% tip length)
Tool model
A tool is modeled as standard with an accuracy of one third of the collision tolerance
(Page 267). The geometric data of the modeled tool is stored in an internal file in STL format:
● Directory: _N_PROT3D_DIR/_N_TOOL_DIR
● Identifiers: Name of the associated protection area with prefix _N_ and ending with _STL
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The tool is modeled by a cylinder with the height L1 and radius R. If the length L1 is
negative the absolute value of L1 is used for the cylinder height. The sign L1 is taken
into account when positioning the cylinder in the machine model. The cylinder axis is
parallel to L1.
Tool type 110 (ball end mill cutter) and 111 (face cutter) are modeled using half a sphere
or sphere segments.
If the radius is negative the absolute value of the radius is used. If the value for the radius
is less than 1/3 mm, a radius of 1/3 mm is used.
The cylinder is positioned in the machine model using the tool length components L2
and L3.
For milling tools (tool type 100 ... 199) and drilling tools (tool type 200 ... 299) on turning
machines the cylinder is positioned using the cutting edge position.
Precondition: Cutting edge position == 5 ... 8
Grinding tools (grinding wheel, tool type 400 ... 499) are modeled by a cylinder with the
tool length as the radius and double the tool radius as the height.
The cylinder is positioned in the machine model using the tool lengths L1, L2 and L3.
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions