Repair Siemens
SINUMERIK CNC
SINUMERIK 840D sl · 828D · 808D · 840C (EOL) · 802D sl · SIMODRIVE 611D · S120
Service of Siemens SINUMERIK CNC systems — repair of NCU, SIMODRIVE 611D and SINAMICS S120-M servo drives, spindle SLM and OP operator panels. NC parameter and program backup, no-obligation quote, 12-month warranty.
Diagnostics included in repair
Priority quote
12-month warranty
Courier pickup from all of Europe
NC parameter and program backup
SINUMERIK service: from NCU to servo drives and power supplies
SINUMERIK 840D sl
Repair of NCU 710/720/730.3. Service of CF and DRAM memory, Profinet/PROFIBUS ports, NC-PLC cards. Data backup via SINUMERIK Operate.
SINUMERIK 828D
Repair of compact NCU PPU241/261/281 units. Service of processor boards, interface cards and internal PPU power supply.
SINUMERIK 840C (EOL)
Repair of the discontinued 840C series — EFIXLAB specialization. Regeneration of NCU 572/573 boards, GD (General Drive) cards, battery and memory replacement.
SIMODRIVE 611D / S120-M
Repair of SIMODRIVE 611D servo amplifiers and S120-M CNC modules. IGBT and capacitor replacement, service of DRIVE-CLiQ control cards.
Spindle and SLM
Repair of spindle drive SLM (Spindle Line Module). IGBT and power section capacitor replacement, service of encoders and SMI interfaces.
Panel operatorski OP / PCU
Repair of OP010/012/015/019 panels, PCU50 and ORU. Replacement of LCD display matrix, touchscreen and PCU power supply.
Why EFIXLAB?
Specialization in all SINUMERIK generations
- Data backup before repair — backup of NC programs (MPF/SPF), technological data and machine parameters via SINUMERIK Operate or HMI Advanced.
- 840C (EOL) — we repair when others refuse — the discontinued SINUMERIK 840C platform is one of our main areas of expertise. We have components for it.
- Full CNC drive chain — NCU + 611D/S120 servo drives + SLM power supplies in one place, without division into subcontractors.
- DRIVE-CLiQ and Profibus testing — verification of axis and spindle communication after repair before returning.
- Priority for stopped machines — we react immediately to urgent requests. Quote first in the queue.
- 12-month warranty — on all performed work with no exceptions.
How does repair work for?
Transparent process for stopped machine tools
Request
online or by phone
Shipping
by courier
Param backup
+ diagnostics
Quote
no obligation
Repair
& testing
Return
with warranty
Report fault SINUMERIK — no-obligation quote
Provide the SINUMERIK model and alarm description. Our Siemens CNC specialist will respond with a diagnosis and quote.
Dziękujemy! We received your request — our SINUMERIK specialist will contact you shortly.Frequently asked questions
Yes — the discontinued SINUMERIK 840C is one of our specializations. We have components for regenerating NCU 572/573 and GD cards. It is significantly faster and cheaper than retrofitting to 840D.
Yes — before repair we create a backup of NC programs and machine parameters via SINUMERIK Operate or HMI Advanced. After repair all data is restored to the NCU.
Yes — SIMODRIVE 611D is one of the most commonly repaired CNC drive platforms by us. We replace IGBT modules, capacitors and repair control electronics. Service of single- and dual-axis modules.
Diagnostics: 1–2 business days. Repair after approval: 5–7 business days (after receiving necessary components). For stopped machines we use priority mode and minimize turnaround time. As a rule — repair time may be significantly extended depending on component availability and repair complexity. Deadlines are agreed individually with the client.
We return the module; if repair is declined, we charge a diagnostics fee (300 PLN net). We can advise on a replacement or propose a retrofit to the newer SINUMERIK 840D sl or 828D.
Other CNC systems
Siemens SINUMERIK CNC Repair — 840D, 828D, and Legacy Controllers
Siemens SINUMERIK CNC systems — 840D sl, 828D, and legacy 840D/810D/802D — are the most widely used CNC platforms in European machine tools. The SINUMERIK architecture integrates the NCU (Numerical Control Unit), drive system (SINAMICS S120 or legacy SIMODRIVE), operator panels (OP/TP), machine control panel (MCP), and distributed I/O. From 3-axis milling to complex 5-axis simultaneous machining, SINUMERIK controls manage the precision motion that modern manufacturing demands.
Common SINUMERIK failures include NCU processor board faults, CompactFlash/CFast storage degradation, operator panel display and touchscreen failures, machine control panel button and switch wear, drive system failures (covered separately), and communication issues between CNC components. The 840D sl NCU 7x0 series may develop Ethernet switch issues and storage media wear, while legacy 810D/840D with SIMODRIVE 611 face the combined aging challenges of older CNC and drive hardware.
At EFIXLAB, we repair all SINUMERIK hardware components. Our service covers NCU diagnostics and board-level repair (including CFast replacement and NC data recovery), operator panel display and touchscreen restoration, MCP key switch and encoder replacement, PCU industrial PC repair, and communication interface troubleshooting. We verify CNC functionality using SINUMERIK diagnostic tools and test all repaired components in their correct system context.
SINUMERIK repair is essential for maintaining the enormous European machine tool fleet. NCU repair alone can save 50–70% versus new unit cost, and preserves existing NC programs, tool data, and machine parameters. For legacy 810D and 802D systems, repair is the only viable option. All SINUMERIK repairs include comprehensive testing and our 12-month warranty.