July 2013 8.6 DCM – Dynamic Collision Monitoring 1479
Listed below are the basic methods for using DCM to protect tool carriers
from collisions:
1. Modeling tool carriers with KinematicsDesign
HEIDENHAIN provides its own carrier kinematics descriptions, which were
created with the PC program KinematicsDesign, for downloading. You can
create additional tool-carrier kinematics descriptions, and provide them to
your end users. Templates for carrier kinematics descriptions have the file
name extension *.cft
2. Defining tool-carrier kinematics descriptions with the FixtureWizard
With the FixtureWizard, the machine operator defines the exact dimensions
of the tool carrier by entering parameter values in the template. The
FixtureWizard is available as a stand-alone PC tool and as a component of
the iTNC. It generates a tool carrier with concrete dimensions defined by
you. Usable tool-carrier kinematics descriptions have the file name
extension *.cfx.
For information on operating the FixtureWizard, refer to Chapter 11.3 –
"Fixture Monitoring" of the User's Manual for the iTNC 530.
The most important functions are described below by using a simple example
carrier. Use the tool-carrier templates from HEIDENHAIN as examples if you
want to create more complex templates. However, be sure not to change the
original HEIDENHAIN templates.
Prerequisites The software option 40 (DCM - Dynamic Collision Monitoring) must be
enabled.
Permissible insertion points for the tool carriers must be defined in the
kinematics description. Do so in the KEY column of the description table via
the entry TOOLFILE.
Files The following files are relevant for tool-carrier kinematics.
Template for a tool-carrier kinematics description – *.cft
Variable template for a tool-carrier kinematics description. This template is
created with KinematicsDesign. Tool-carrier templates from HEIDENHAIN
are in the directory PLC:\Toolkinematics. Please save your own tool-carrier
templates with names differing from those of the HEIDENHAIN templates.
Use the FixtureWizard to edit the created *.cft file and to generate a *.cfx
file from it.
Individual tool-carrier kinematics – *.cfx
Tool carrier that can be inserted directly in the machine kinematics. The
*.cfx files created with FixtureWizard are saved in the same default
directory, from which the *.cft file was opened.
Kinematics tables for collision monitoring – *.tab
If a TOOL CALL calls a tool for which a tool-carrier kinematics description is
indicated in the tool table, then *.TAB files are automatically created during
the TOOL CALL. These *.TAB files are then taken into account by DCM.
Each *.CFX file is converted to a corresponding *.TAB file on the SYS
partition. Therefore, all *.CFX files that are necessary for the description of
a tool carrier must be on the control.
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