HEIDENHAIN iTNC 530 (340 49x-02) Pilot - Manual (Page 139)

139
Gener
a
ti
ng C
ont
ou
r Pr
og
rams
from DXF Data (Software
Datum specifying
The datum of the drawing for the DXF file is not always located in manner
that lets you use it directly as reference point for the workpiece.
Therefore, the TNC has a function with which you can shift the drawing
datum to a suitable location by clicking an element.
You can define a reference point at the following locations:
„ At the beginning, end or center of a straight line
„ At the beginning or end of a circular arc
„ At the transition between quadrants or at the center of a complete
circle
„ At the intersection of a
„ straight line and a straight line, even if the intersection is actually on
the extension of one of the lines
„ straight line and a circular arc
„ straight line and a complete circle
You must use the touchpad on the TNC keyboard or a
mouse attached via the USB port in order to specify a
reference point.
You can also change the reference point once you have
already selected the contour. The TNC does not calculate
the actual contour data until you save the selected
contour in a contour program.