HEIDENHAIN iTNC 530 223
7.1 Processing DXF Files (Software Option)
Specifying the reference point
The datum of the drawing for the DXF file is not always located in a
manner that lets you use it directly as a 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:
îš„ At the beginning, end or center of a straight line
îš„ At the beginning or end of a circular arc
îš„ At the transition between quadrants or at the center of a complete
circle
îš„ At the intersection between:
îš„ A straight line and a straight line, even if the intersection is actually
on the extension of one of the lines
îš„ A straight line and circular arc
îš„ A straight line and full circle
îš„ A circle and circle (regardless of whether a circular arc or a full
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.
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