Setting A Datum - HEIDENHAIN TNC 620 User Manual

Setting a datum

The datum of the drawing for the DXF file is not always located in
a manner that lets you use it directly as a datum 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 datum at the following locations:
By directly inputting numerical values into the List View window
At the beginning, end or center of a straight line
At the beginning, center or end of a circular arc
At the transition between quadrants or at the center of a
complete circle
At the intersection between:
A straight line and a straight line, even if the intersection is
actually on the extension of one of the lines
Straight line – circular arc
Straight line – full circle
Circle – circle (regardless of whether a circular arc or a full
circle)
You must use the touchpad or a connected mouse 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.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
DXF converter (option 42)
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