DMG Mori Control Generation
Spindle Service on Heidenhain TNC (DMG Mori)
Heidenhain TNC is the common control on DMG Mori's DMU and DMC 5-axis lines — iTNC 530 on legacy builds, TNC 640 on current. Spindle parameters and drive tuning on TNC are managed differently from Siemens, and the workflow for kinematic verification after 5-axis spindle work uses Heidenhain's documented procedures. Most DMU spindle service routes through this control.
Machines this control shipped on
Heidenhain TNC ships on the DMU/DMC 5-axis family — DMU 50 through DMU 340, monoBLOCK and duoBLOCK builds, DMU eVo, and the DMC universals. Most of the high-end DMG Mori 5-axis spindle work runs on this control.
Common failures and fixes
- Keypad failure affecting spindle setup workflow — most common single failure on iTNC 530.
- Encoder drift on rotary-axis encoders for trunnion machines affecting RTCP after spindle work.
- MC (Main Computer) board faults on older iTNC 530.
- Memory battery loss affecting spindle and machine parameters.
Parts availability
Heidenhain TNC parts are well supported through Heidenhain and authorized service partners. iTNC 530 is heading toward late-life; TNC 640 is fully current.
Battery, memory, and parameter recovery
Heidenhain TNC spindle parameter backup is well documented — back up to network or USB before any work. Tool tables and spindle-specific parameters (drive tuning, encoder offsets) go into the standard backup. After spindle work on a DMU 5-axis machine, we run the documented kinematic verification before sign-off.