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TNC 640






MC main computer

CC or UEC controller units

BF color TFT flat-panel display with soft keys (15.1 or 19 inches)

TE operating panel (suitable for screens with 15.1 or 19 inches)

Operating system

HEROS 5 real-time operating system for machine control


RAM memory: 4 GB

Program memory: SSDR approx. 21 GB

HDR approx. 144 GB

Input resolution and display step



Linear axes: up to 0.1 µm

Angular axes: to 0.000 1°

Linear axes: to 0.01 µm

Angular axes: to 0.000 01°

Input range

Maximum 999 999 999 mm or 999 999 999°




Linear in 4 axes

Linear in 5 axes (subject to export permit)

Circular in 2 axes

Circular in 3 axes with tilted working plane

Helical: superimposition of circular and straight paths

Block processing time

0.5 ms (3-D straight line without radius compensation)

Axis feedback control

Position loop resolution: Signal period of the position encoder/1024

Cycle time of position controller: 200 µs (100 µs with option 49)

Cycle time of speed controller: 200 µs (100 µs with option 49)

Cycle time of current controller: minimum 100 µs (minimum 50 µs with option 49)

Range of traverse

Maximum 100 m (3937 inches)

Spindle speed

Maximum 100 000 rpm (with 2 pole pairs)

Error compensation

Linear and nonlinear axis error, backlash, reversal spikes during circular movements, hysteresis, thermal expansion

Static friction, sliding friction

Data interfaces


One each RS-232-C/V.24 max. 115 Kbps

Extended data interface with LSV2 protocol for remote operation of the TNC over the data interface with the HEIDENHAIN software TNCremo or TNCremoPlus

2 x Gigabit Ethernet interface 1000BASE-T

5 x USB (1 x front USB 2.0, 4 x USB 3.0)

HEIDENHAIN-DNC for communication between a Windows application and TNC (DCOM interface)


Fast and simple troubleshooting through integrated diagnostic aids

Ambient temperature

Operation: 5 °C to 40 °C

Storage: –20 °C to +60 °C