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CNC Systems Repair and Service

Comprehensive CNC Electronics Service

CNC (Computer Numerical Control) machines are the heart of modern industrial production. Machine downtime means production line stoppage and significant financial losses. EFIXLAB specializes in rapid diagnosis and effective repair of all electronic components of CNC systems.

What We Repair in CNC Systems

CNC Controllers

• Siemens Sinumerik (840D, 828D, 808D) - motherboard repair, NCU modules, communication interfaces
• Fanuc Series (0i, 16i, 18i, 21i, 30i, 31i, 32i) - CPU module regeneration, memory, I/O circuits
• Heidenhain TNC (620, 640, iTNC 530) - processor board service, screens, communication modules
• Mitsubishi (M70, M80, E80) - central unit repair, expansion cards
• Mazak, Okuma OSP, Haas - diagnostics and complete controller regeneration

Power Modules and Drives

• Siemens Simodrive (611, 840D) - IGBT module replacement, capacitors, braking resistors
• Fanuc Alpha/Beta Servo - power amplifier regeneration, power component replacement
• Indramat/Bosch Rexroth - servo drive repair, inverters, power supply modules

Motherboards and Processor Modules

• Surge and ESD damage
• Memory problems - backup battery replacement, data recovery
• Communication port failures - RS232, RS485, Ethernet
• Processor, FPGA, Flash and RAM damage

Operator Panels and HMI

• Keypad panels - membrane replacement, contact cleaning, backlight repair
• Touchscreens - calibration, digitizer replacement, LCD matrix repair
• Graphic panels - control board regeneration, LED/CCFL backlight replacement

Common CNC System Failures

Alarm and Communication Errors

• Alarm 401-404 (Fanuc) - encoder or cable damage
• Alarm 20041 (Siemens) - communication module failure
• Overload/Overheat - power module overheating, cooling problems
• Servo Error - amplifier, encoder or wiring problems

Power Drive Failures

• IGBT short circuit - overload, collision, aging
• Gate driver defect - incorrect IGBT control
• DC-Link capacitors - drying out after 5-10 years
• Encoder errors - cable breaks, contaminated optical discs