Klartext Portal – The Information Site for HEIDENHAIN Controls

You DXF converter enables you to open DXF files directly on the TNC 640 in order to extract contours or machining positions. Not only does this save time otherwise spent on programming and testing, but you can also be sure that the finished contour is exactly according to the designer’s specifications. After the DXF file has been loaded onto the TNC from the network or a USB stick, you can open the file in the file manager of the TNC, just like an NC program.

As a rule, DXF files contain multiple layers, with which the designer organizes the drawing. So that as little unnecessary information as possible appears on the screen during selection of the contours, you can hide via mouse click all excessive layers contained in the DXF file. This requires a keyboard with touchpad or an external pointing device. The TNC can select a contour train even if it has been saved in different layers.


The TNC also supports you when defining the workpiece preset. The datum of the drawing for a DXF file is not always located where you can use it directly as the workpiece preset, especially when the drawing contains multiple views. For this reason, the TNC has a function with which you can shift the drawing datum to a suitable location simply by clicking an element.

Contour selection is exceptionally user friendly. You select any element by clicking it with the mouse. As soon as you select a second element, the TNC detects your desired direction of machining, and starts the automatic contour detection. The TNC automatically selects all clearly identifiable contour elements until the contour closes or branches out. There you click the immediately following contour element. In this way you can define even extensive contours with just a few mouse clicks. If desired, you can also shorten, lengthen or interrupt the contour elements.


But you can also select machining positions and save them as point files, particularly in order to use drilling positions or starting points for pocket machining. This can be done very easily: Using the mouse, simply select the desired area. In a pop-up window with filter function, the TNC displays all hole diameters that are within the area you have selected. To select the desired hole diameters and restrict the number of hole positions, simply click the corresponding filter symbol to change the filter limits.

A zoom function and various possibilities for settings round out the functionality of the DXF converter. Moreover, you can define the resolution of the contour program to be uploaded in case you want to use it on older TNC controls, or a transition tolerance if occasionally the elements do not quite adjoin.