Symbiosis of efficiency and convenience:
The TNC for milling and turning

The TNC 640 combines the operational processes for milling and turning in one control. In the NC program, you can change as desired between turning and milling. The intelligent combination of milling and turning helps the user to save time and money.

And changing between turning and milling is particularly convenient and suited for daily use. 

  • For milling machines, milling-turning machines, and machining centers
  • Up to 24 control loops
  • 5-axis and HSC machining
  • Hobbing, gear machining, and grinding operations
  • Multi-touch screen

3-D simulation graphics

The TNC 640 provides informative, detailed 3-D simulation graphics for both milling and turning operations. This allows you to evaluate in advance whether your machining program contains all necessary information, such as whether the machining operations run smoothly and the surfaces achieve the desired quality.


  • Simulation of external and machine-generated NC programs
  • Consideration of the actual machine kinematics
  • Inspection of tool stock and tool calls
  • Precise depiction of the workpiece
  • Freely selectable view of details
  • Permanent adjustment of viewing angles and viewing options during the ongoing simulation

ADP – Advanced Dynamic Prediction

NC data with an insufficient resolution and variable point density in adjacent paths can lead to feed rate fluctuations and errors on the workpiece surface. ADP – Advanced Dynamic Prediction improves the calculation of the optimum speed for a precise and smooth movement of the TCP.

With ADP, the TNC control can dynamically calculate the contour in advance and adapt the axis speeds in time for contour transitions using acceleration-limited and jerk-smoothing motion control. As a result, clean surfaces can be milled in short machining times for contours with highly irregular point distributions in neighboring tool paths.


  • Higher contour speed and shorter machining times
  • Superior surface quality

The strengths of ADP are evident, for example, in bidirectional finish milling in the following ways:

  • Through symmetrical feed rate behavior on back-and forth paths
  • Through particularly smooth feed rate curves for neighboring milling paths

Operate the TNC 640 Intuitively

Manufacture with process reliability, even with lot size 1. This is very quick, simple, and intuitive with the TNC 640. The combination of the classic control screen, the Extended Workspace Compact view to one side, and multitouch operation makes it possible!

Optimized editor for clear and simple operation

With the new editor, NC programs can be created more easily. The editor is even more powerful, the handling of DXF files was simplified, and PDF files can be displayed directly on the control.

With the context-sensitive cutting data calculator, operators can calculate spindle speed and feed rate for the specific machining process and adopt these values directly into the open feed rate or speed dialog.

With smartSelect you enjoy dialog guidance for selecting functions quickly and easily that up to now were accessible only through the soft-key structure.

Horizontal machining

The TNC 640 offers significant advantages not only in vertical machining, but in horizontal machining as well. Among contributing factors are the Dynamic Efficiency functions. They make it possible to increase metal removal rates and are particularly effective during heavy machining and roughing, which also applies for horizontal machining.

Horizontal machining is commonly used in fully automated manufacturing processes, too. The TNC 640 also supports horizontal machining with numerous well proven functions, such as pallet machining. So that differing workpieces can be fed and machined in a defined sequence via handling systems. Beyond that, Connected Machining allows the easy integration of the control in automated manufacturing processes. This enables the TNC 640 to support uniformly digital order management in manufacturing.

Multi-Operation Machining: Milling, turning, and grinding on one machine

A TNC 640 on a milling-turning machine can save you a lot of time. With it, you can machine the complete part in one setup using milling, turning, and grinding operations in any sequence desired. And when you're finished, you can measure the finished part inside the machine using a HEIDENHAIN touch probe.

The TNC 640 gives you powerful functions for easily switching between turning, dressing, and milling modes, all from within the NC program.