| TNC 320 | TNC 620 | |
| Axes | 3 axes + spindle Optional 4th and 5th axis (with noncontrolled spindle) | 3 axes + spindle Optional 4th and 5th axes |
| Interpolation | s Linear in 4 axes s Circular in 2 axes sHelical, superimposition of circular and straight paths s Cylinder surface (option) | s Linear: in 4 axes (optionally 5) s Circular: in 2 (optionally 3) axes s Helical, superimposition of circular and straight paths s Cylinder surface (option) |
| Program entry | s HEIDENHAIN conversational s DIN/ISO (program input via soft keys or via external USB keyboard) s FK free contour programming (option on the TNC 620) | s HEIDENHAIN conversational s DIN/ISO (program input via soft keys or via external USB keyboard) s FK free contour programming (option on the TNC 620) |
| Programming support | TNCguide presents user information directly on the TNC | TNCguide presents user information directly on the TNC |
| DXF converter option | - | Download contours and machining positions from DXF files |
| Program memory | 300 MB | 300 MB |
| Position entry | s Positions in Cartesian or polar coordinates s Incremental or absolute dimensions s Display and entry in mm or inches s Actual position capture | s Positions in Cartesian or polar coordinates s Incremental or absolute dimensions s Display and entry in mm or inches s Actual position capture |
| Input resolution and display step | Down to 0.1 μm or 0.000 1° | Down to 0.1 μm or 0.000 1°; optionally to 0.01 μm or 0.000 01° |
| Block processing time | 6 ms | 1.5 ms |
| Coordinate transformation | s Datum shift, rotation, mirror image, scaling factor (axis-specific) s Tilting the working plane, PLANE function (option) | s Datum shift, rotation, mirror image, scaling factor (axis-specific) s Tilting the working plane, PLANE function (option) |
| Fixed cycles (some optional with the TNC 620) | s Drilling, tapping, thread cutting, reaming and boring s Cycles for hole patterns, facing of flat surfaces s Pocket clearance and finishing, slots and studs | s Drilling, tapping, thread cutting, reaming and boring s Cycles for hole patterns, facing of flat surfaces s Pocket clearance and finishing, slots and studs |
| Touch probe cycles | For tool measurement, workpiece alignment, workpiece measurement and datum setting (option with TNC 620) | For tool measurement, workpiece alignment, workpiece measurement and datum setting (option with TNC 620) |
| Graphics | For programming and program verification (option with TNC 620); graphic support with cycle programming | For programming and program verification (option with TNC 620); graphic support with cycle programming |
| Parallel operation | Programming during program run, program-run graphics (option with TNC 620) | Programming during program run, program-run graphics (option with TNC 620) |
| Data interface | s Ethernet 1000BASE-T s USB 2.0 s RS-232-C/V.24 and RS-422/V.11 (max. 115 200 baud) | s Ethernet 1000BASE-T s USB 2.0 s RS-232-C/V.24 and RS-422/V.11 (max. 115 200 baud) |
| Visual display unit | 15-inch color flat-panel display (TFT) | 15-inch color flat-panel display (TFT) |
| Axis feedback control | Feedforward control or operation with following
error - | Feedforward control or operation with following
error Integrated digital drive control for synchronous and asynchronous motors |
| Interfacing to the Machine | Via integrated programmable logic controller
(PLC) Inputs/outputs expandable via PL 510 | Via integrated programmable logic controller
(PLC) Inputs/outputs via PL 6000 |
| Accessories | s HR electronic handwheels s TS workpiece touch probe and TT or TL tool touch probe | s HR electronic handwheels s TS workpiece touch probe and TT or TL tool touch probe |