Lenze PLC Designer PLC-Designer (R2-x) SoftMotion - Manual (Page 93)

DMS 5.2 EN 03/2011 TD17
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L-force | PLC Designer - SoftMotion
CAM editor
Editing a cam
equidistant point table
An SMC_CAMTable_<Data type>_<Element number>_1 type interpolation point table is
created on the basis of the settings towards the bottom of the dialog. The position array of
the dialog contains the slave values of the cam with reference to the master values, which
are distributed evenly on the domain of the master axis. The first value in the table refers
to the slave position at the master minimum of the cam. For non-periodic cams, the last
value refers to the slave position at the master maximum. For periodic cams this value does
not need to be rewritten, because it is the same as that at the master minimum; for this
reason the intervals are made slightly narrower and the last value in the table describes the
slave position at Master.End - (Master.End-Master.Start)/Number of elements.
element optimised point table
A two-dimensional (not usually equidistant) SMC_CAMTable_<Data type>_<Element
number>_2 type interpolation point table is created on the basis of the settings towards
the bottom of the dialog. The table it contains describes pairs of master and associated
slave positions. Partitioning is applied so that elements with constant velocity (lines) are
only assigned one interpolation point each at the start and end respectively. The remaining
interpolation points are distributed as evenly as possible across the remainder of the cam.
do not compile
No global variables are created for the cam. This option is used primarily if the cam needs
to be loaded from the file system during runtime, for example because it needs to be
changed without affecting the active »PLC Designer« project.
Scaling is only relevant for interpolation point tables. You can define the scaling of the
master and the slave axis by assigning either start and end values or start and end units.
5.4.3.5 Write Cam to File
This menu item opens a file selection dialog in which a *.CAM file can be defined to which
the current cam will be written. This file can be read during runtime and converted to a
standard data structure by the SMC_ReadCAM function block. The cam will be stored in
polynomial, equidistant or element-optimised format in accordance with the currently set
compile option.
5.4.3.6 Read Cam from File
This menu item can be used to reimport a CAM file *. into the »PLC Designer«. Once the
required file has been selected, the Cam properties dialog will appear in which a name for
the cam must be entered and the scaling of the slave axis must be adapted.
Due to the fact that during the creation of a cam only the information needed for the
execution of the cam is output, a read cam may differ from the original..