HEIDENHAIN CNC Pilot 4290 - Manual (Page 275)

HEIDENHAIN CNC PILOT 4290 263
6.8 Importing DXF Contours
6.8.1 Fundamentals
Contours available in DXF format can be imported into the TURN
PLUS programming mode of operation.
DXF contours describe
■ Workpiece blanks
■ Finished parts
■ Contour train
■ Milling contours
For workpiece blank and finished-part contours as well as for
contour trains, DXF layers should contain only one contour. For
milling contours multiple contours can be contained and imported.
Requirements of a DXF contour or DXF file
■ Only two-dimensional elements
■ The contour must be in a separate layer (without dimension lines,
without wraparound edges, etc.)
■ Turning contours (workpiece blanks or finished parts) should be
shown above the turning center (if this is not the case, then they
must be revised in TURN PLUS)
■ No complete circles, no splines, no DXF blocks (macros), etc.
■ The imported contours can consist of up to 4000 elements (lines,
arcs). In addition, up to 10 000 polyline points are permitted.
Preparation of contours during DXF import
The contour is converted from DXF format to TURN PLUS format
during importation. The following changes are made to the contour
representation, since there are basic differences between the DXF
and TURN PLUS formats:
■ Possible gaps between contour elements are closed
■ Polylines are transformed into linear elements
In addition, the following features, which are necessary for a TURN
PLUS contour, are specified:
■ The starting point of the contour
■ The rotational direction of the contour
Sequence of a DXF importation:
Selection of the DXF file
Selection of the layer, which contains only the contour(s)
Import of the contour(s)
Saving (and editing) of the contour in TURN PLUS
6.8 Importing DXF Contours