True-to-detail 3-D simulation graphics are a feature of the new and uprated (version 4) TNC 640 mill-turn CNC from Heidenhain (GB) Ltd (www.heidenhain.co.uk).

By allowing operators to easily and quickly identify missing program information or inconsistencies prior to machining, new programs — for both milling and turning — can confidently be run at full speed and workpiece rejects avoided.

Users first define the blank (milling and turning can be combined in the same program); the program then runs virtually, producing detailed displays of the actual machining process.

A ‘blank frame’ functionality, for example, displays the original dimensions of the workpiece blank as a frame with all principal axes. This is particularly useful with complex components.

In addition, to assist with spatial details, the TNC 640 software displays the workpiece edges as lines. Meanwhile, the ‘transparent tool’ option provides a view of internal machining (tools can be hidden or shown in their entirety), and different machining sequences can be highlighted by different colours.

The graphic of the workpiece and the tool-paths (or of both together) can be rotated, moved or zoomed to view high-detail sections — and it can be easily modified by the operator via soft keys or mouse. Furthermore, viewing angles and options can be modified and adapted at any time.

The latest version of the TNC 640 CNC also features ADP (Advanced Dynamic Prediction) functionality, which optimises feed motions on three- and five-axis milling routines.