FANUC A06B-6079-H106 Servo Amplifier Unit

Module Feature

A06B-6079-H106 is FANUC Alpha series single-axis servo amplifier, designated SVM1-130. It receives DC bus power from matched Alpha power supply module and drives one FANUC Alpha AC servo motor, commonly model 22 type. Rated power is 9.1kW with 52.2A continuous output current, maximum 230V three-phase AC output. It adopts analog command control architecture, not FSSB fiber interface. Integrated brake chopper circuit requires external dynamic brake resistor for regenerative energy dissipation. Forced air cooling by internal fan, model A90L-0001-0580. Overload capacity supports 150% overload for 3 seconds and 120% overload for 60 seconds. Protection functions include overcurrent, overvoltage, undervoltage, overtemperature, encoder signal loss and short-circuit protection. Widely applied for milling centers, lathes and grinding machine linear feed axes.

Working principle

DC bus voltage from power supply unit enters this servo amplifier. IGBT power bridge converts DC into variable frequency variable voltage three-phase AC to drive servo motor. Encoder feedback signal returns motor position and speed data for closed-loop position and velocity control. When motor decelerates, regenerative energy triggers internal chopper to dissipate surplus energy on external brake resistor. Amplifier exchanges enable, alarm and status signals with FANUC CNC main control board via analog and I/O wiring.

Onboard components

IGBT power stage assembly, gate drive board, current sampling circuit, brake chopper circuit, encoder signal processing board, control logic PCB, cooling fan, terminal block for DC bus, motor, feedback and control signals.

LED indicators

Front panel status LEDs for power, ready, fault and alarm; alarm codes are displayed on CNC operator panel.

Hardware self‑diagnosis

Power-on self-test detects DC bus out of range, output overcurrent, motor overtemperature, encoder disconnection, fan stop and internal hardware fault. Alarm numbers and fault history are stored in CNC system memory.

Programming software

FANUC SERVO GUIDE software for parameter setting, gain auto-tuning and waveform monitoring; parameter backup and restore via CNC system.

Electrical & Process Parameters

Model:A06B-6079-H106 Brand:FANUC Type:SVM1-130 Single Axis Servo Amplifier Rated power:9.1 kW DC bus input:283~325 VDC Rated output current:52.2 A Max output voltage:230V 3-phase AC Cooling:Internal forced fan cooling Brake circuit:Built-in chopper, external resistor required Function:Closed-loop position and speed control for CNC feed servo axis

Mechanical & Structure

Mounting:Cabinet backplane mounting Protection class:IP20 Housing:Metal enclosed drive unit

Environmental

Operating temperature:0℃ ~ +45℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE compliant Status:FANUC original Alpha servo spare

Installation

Mount amplifier inside CNC electrical cabinet. Connect DC bus cable from Alpha power supply, motor power cable and encoder feedback cable. Wire brake resistor to brake terminals. Set servo parameters and perform axis tuning with SERVO GUIDE. Verify movement, overtravel and emergency stop function before machining test. Keep fan and air filter clean regularly.

Interface

DC bus input terminals, motor three-phase output terminals, encoder feedback connector, brake resistor terminals, control signal and alarm I/O terminals.

Diagnostic

Overcurrent alarm: Motor insulation damage, power cable short or mechanical jam. Overtemperature alarm: Fan failure, filter clogging or continuous heavy overload. Encoder alarm: Encoder cable breakage, loose connector or encoder damage. Excessive vibration: Improper gain tuning, mechanical resonance or coupling misalignment.

Product Brief

FANUC A06B-6079-H106 Alpha SVM1-130 single-axis servo amplifier, 9.1kW, 52.2A, 283-325V DC input, analog control with built-in brake chopper, used for CNC machine feed axis and Alpha model 22 servo motor drive.