Repair Heidenhain
TNC CNC
TNC 640 · TNC 620 · iTNC 530 · TNC 430 (EOL) · TNC 310/426 (EOL) · UR 2xx · RCN/EQN encoders
Specialist service of Heidenhain TNC controllers — repair of NC computers (CC 422/424), axis cards, UR225/230 regulators, absolute encoders and complete measuring circuit cables. Diagnostics within 24h, 12-month warranty.
Diagnostics included in repair
Priority quote
12-month warranty
Courier pickup from all of Europe
NC contour program backup
Heidenhain TNC service: from CC cards to encoders
TNC 640
Repair of TNC 640 NC computer (5-axis). Service of CC 424 cards, MC 422C axis modules, SSD memory, EnDat/Profibus/Ethernet ports. Backup via TNCremo.
TNC 620
Repair of TNC 620 (3–5 axes). Service of CC 422B cards, network ports, and drive supply and monitoring units.
iTNC 530 (EOL)
Repair of discontinued iTNC 530 — EFIXLAB specialization. CC 422, CC 424, MC cards, 1Vpp and EnDat 2.1 encoders. Replacement of RAM backup batteries.
TNC 430 / 426 / 310 (EOL)
Repair of classic TNC 430, TNC 426 and TNC 310. Regeneration of GL 15x, BL 50x/51x cards, capacitors and PS power supplies.
UR 225 / 230 servo regulators
Repair of UR225 and UR230 servo drive amplifiers. Replacement of IGBT transistors, DC-link section capacitors, service of SSE control cards.
RCN / EQN / ECN encoders
Repair and calibration of Heidenhain absolute encoders RCN 700/800, EQN 1325/1135, ECN 133/413. Regeneration of scanning head, repair of EnDat connector damage.
Why EFIXLAB?
Specialists in Heidenhain measurement and control systems
- TNCremo program backup — before repair we archive all NC (.H) files and tool tables, so the machine returns immediately to production.
- iTNC 530 (EOL) — specialization — the discontinued model is the most common cause of downtime. We have a stock of refurbished CC cards for quick replacement.
- Heidenhain encoders — calibration and regeneration of absolute EnDat encoders, option to ship with a loaner replacement during repair.
- Axis tests after repair — verification of 1Vpp/EnDat signals and position read-back accuracy before returning modules.
- Priority for machines in operation — we react immediately to requests from stopped production.
- 12-month warranty — on all performed work.
How does Heidenhain TNC repair work?
Request
online or by phone
Shipping
by courier
Backup NC
+ diagnostics
Quote
no obligation
Repair
& axis testing
Return
with warranty
Report fault Heidenhain TNC — no-obligation quote
Provide the TNC model and fault description (alarm number / machine behaviour). Our Heidenhain specialist will get back to you with a diagnosis and quote.
Dziękujemy! We have received your request — our TNC specialist will contact you shortly.Frequently asked questions
Yes — iTNC 530 is one of our main focus areas. We have refurbished CC 422/424 and MC cards in stock. We also repair TNC 430, TNC 426 and TNC 310.
Before any intervention we back up NC (.H) files, PGM, cycles, tool tables and machine parameters via TNCremo. After repair all files return to the TNC.
Yes — we repair and calibrate RCN, EQN, ECN series encoders and linear LS encoders. We offer a loaner replacement during repair.
Cost depends on the extent of damage — usually from tens to several hundred PLN for repair. Quote after diagnostics, no hidden charges.
Diagnostics: 1–2 business days. Repair after quote approval: 5–7 business days (after receiving necessary components). Express mode available for urgent stopped machines. As a rule — repair time may be significantly extended depending on component availability and repair complexity. Deadlines are agreed individually with the client.
Heidenhain TNC Controller Repair — CNC Systems for Machine Tools
Heidenhain TNC controllers — including TNC 128, TNC 320, TNC 426, TNC 430, TNC 530, TNC 620, TNC 640, and the flagship TNC7 — are premium CNC systems favored by European machine tool builders for milling, boring, and grinding operations. Known for their intuitive conversational programming and exceptional contour accuracy, TNC controllers are installed in machines from DMG MORI, Hermle, Chiron, Mikron, and many other leading manufacturers. A TNC failure means an expensive machine tool sitting idle.
Common TNC controller failures include main computer unit problems (processor board faults, memory failures, hard drive or SSD degradation), display unit failures (LCD backlight burnout, screen controller faults, touch panel issues), interface board malfunctions (encoder inputs, I/O connections, fieldbus communication), and power supply degradation. Older TNC 426/430 units are susceptible to CMOS battery failure causing parameter loss, while TNC 530/620 systems may develop Ethernet and USB interface problems. HR and TE servo modules associated with TNC systems also fail.
EFIXLAB provides expert Heidenhain TNC repair covering all controller generations. Our repair capabilities include main processor board diagnostics and component-level repair, display assembly replacement and repair, interface card fault isolation and repair, power supply rebuild, and storage media recovery and cloning. We test repaired controllers with Heidenhain-compatible test procedures including axis simulation, encoder signal verification, and PLC function testing.
TNC controller repair delivers exceptional value given that new Heidenhain TNC systems cost tens of thousands of euros. Repair savings of 50–75% are common, with turnaround significantly faster than new system delivery lead times. For legacy TNC 360/407/415/426/430 systems that Heidenhain no longer supports, our repair service is essential for keeping valuable machine tools productive. All TNC repairs include comprehensive testing and our 12-month warranty.