HEIDENHAIN iTNC 530 HSCI - Optimizing the DCM Performance

July 2013 8.6 DCM – Dynamic Collision Monitoring 1433
Optimizing the
DCM performance
The calculation of the collision objects, as well as the monitoring of their
relative positions, is very processor-intensive for the iTNC. This calculation
may not consume too many resources, since they are essential to the actual
functions.
In order to satisfy this demand, the number of collision objects must be
defined such that no more than the permissible number of intersections need
be calculated. The number of collision objects themselves must be defined in
such a way that no more than the above mentioned number of intersection
calculations are required. Otherwise the increased calculation efforts can
cause increased block processing times. The maximum number of
intersection calculations applies to the complete collision monitoring model,
including the monitoring of tool-carrier kinematics and fixtures. You therefore
need to save a sufficient number of intersection calculations when describing
the actual machine so that the number of intersection calculations is not
exceeded if you also want to monitor tool-carrier kinematics and fixtures. The
number of collision objects defined (CYLINDERs and CUBOIDs in CMO files)
is not definite, but rather the number of intersections calculated within the
collision object model. The permissible number of intersection calculations
depends on the MC computer being used:
 MC 62xx: Up to 200 intersection calculations
 MC 63xx: Up to 1000 intersection calculations
Deactivated collision objects (see "Activating and deactivating monitoring" on
page 1439) and all definitions of excluded collisions (see "Collision exclusions"
on page 1436) are not included in the calculations. It is therefore important that
all necessary calculations of intersections be specified in advance.
NR KEY AXIS COORD ON/OFF FILE DONTTEST
0 TOOLFILE
1 SUBFILE1
2 MachAxis B
3 CMO CMO_Portal
4 MachAxis X
5 MachAxis Y
6 CMO CMO_FloorSection
7 Trans X 470.0L92
8 Trans Y -282.405
9 Trans Z -900
10 CMO 1 CMO_Cabin
11 MachAxis Z
12 CMO CMO_LiftTable CMO_Cabin
13 MachAxis C
14 CMO CMO_TurnTable CMO_LiftTable
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