Product Core Brief

• Model: A06B-6122-H045#H570
• Brand: Fanuc (发那科)
• Series: Alpha Series Spindle Amplifier Module (SPM)
• Core Function: Delivers high-power, high-precision variable frequency drive control for heavy-duty CNC spindle motors.
• Product Type: Spindle Amplifier Module
• Key Specs: 45kW Power Class | 400V Input | Modular Design | High Dynamic Response
• Condition: New Surplus / Original OEM

Key Technical Specifications

• Manufacturer: Fanuc
• Part Number:570
• Product Category: Spindle Amplifier Module (SPM)
• System Architecture: Fanuc Alpha / Alpha-i Series
• Power Rating: 45 kW (Continuous)
• Input Voltage: AC 400V (3-Phase)
• Control Method: PWM (Pulse Width Modulation)
• Protection Features: Overcurrent, Overvoltage, Undervoltage, Overheat, IPM Fault
• Communication: FSSB (Fiber Optic) / Serial Servo Bus
• Operating Temp Range: Standard Industrial CNC Range
• Compliance: CE / UL

 

Product Introduction (No Fluff)

The Fa# is a high-performance 45kW spindle amplifier module designed for heavy-duty machining centers requiring exceptional torque and speed control. It utilizes advanced PWM technology to provide stable three-phase AC power, enabling precise closed-loop current, speed, and position control for Fanuc spindle motors.

This module features a highly reliable modular architecture that simplifies system integration and maintenance. Sourcing this exact OEM replacement prevents catastrophic production halts and ensures seamless integration with existing Fanuc power supply modules and CNC controllers.

 

QA & Testing SOP (Dynamic & Transparent)

Spindle amplifiers demand rigorous electrical and functional validation. Ev# undergoes a strict inspection process:

1. Anti-Counterfeit Inspection: Verify Fanuc factory labels, PCB silkscreen, and IGBT module markings against OEM baselines.
2. Power Stage Test: Verify DC bus charging, IGBT switching integrity, and output phase balance using a dedicated spindle test bench.
3. Control Logic Validation: Connect to a Fanuc CNC or test simulator to confirm FSSB communication, parameter loading, and alarm-free operation.
4. Protection Function Test: Simulate overcurrent and overvoltage conditions to verify the amplifier trips within specified microseconds.
5. Burn-In: 4-hour continuous operation under nominal load to identify marginal power components.
6. Packaging: Shipped in anti-static shielding with a printed QA test report.

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Power Supply Module (PSM) Sizing: This 45kW spindle amplifier requires a compatible power supply module with sufficient capacity. Verify the PSM rating matches or exceeds the total connected load. An undersized PSM will cause DC bus undervoltage alarms during heavy cutting.

❗ FSSB Fiber Optic Handling: The FSSB connection uses fragile fiber optic cables. Never bend the cable beyond its minimum radius or pull on the connector. A damaged fiber will cause #196 or #197 FSSB communication alarms. Always handle by the connector body.

❗ Overload Margin: When selecting or replacing this amplifier, always ensure there is at least a 20% overload margin for the connected spindle motor. Continuous operation at maximum rated capacity will drastically reduce the amplifier’s lifespan.

❗ EMI Suppression: PWM drive technology generates significant electromagnetic interference. Ensure the amplifier chassis is properly grounded to the machine frame. Motor power cables must be shielded and grounded at the amplifier end only to prevent interference with the CNC controller.

Replacement Protocol:

1. Pre-Install: Lock out the CNC machine power. Wait at least 15 minutes for the DC bus capacitors to fully discharge. Verify 0 VDC at the amplifier terminals.
2. Removal: Disconnect the FSSB fiber, spindle motor power (U, V, W), and control power cables. Release the retaining screws and extract the amplifier straight out. Inspect the backplane connector for bent pins.
3. Install: Align the # with the guides. Seat it firmly and secure the faceplate screws. Reconnect all cables, ensuring the FSSB fiber clicks securely into place.
4. Power-on Test: Restore power. Verify the “READY” LED illuminates. Check the CNC diagnostic page for zero spindle alarms. Run a low-speed rotation test to verify direction. Gradually ramp up to operating speed while monitoring the spindle load meter.

 

Technical FAQ

Yes, provided the full part num# matches exactly. The “#” suffix denotes specific hardware revision, firmware version, or optional features (e.g., built-in regenerative braking specifications). Verify the nameplate matches your existing unit before installation.

Why is this listed as “New Surplus” instead of factory-new?
This is genuine Fanuc stock that was never installed on a machine. It has been stored in climate-controlled inventory rather than exposed to coolant mist, vibration, and continuous thermal cycling. You receive the exact same performance and lifespan as a factory-fresh unit, typically at a significantly lower cost without the 12-16 week OEM lead time.

Can I hot-swap this spindle amplifier while the machine is powered?
No. Never disconnect or connect a spindle amplifier under power. Doing so can cause voltage transients that will destroy the IGBT modules or the FSSB communication interface. Always follow proper lockout/tagout procedures and wait for the DC bus to discharge.

What is the warranty coverage on this part?
We provide a standard 12-month functional warranty. If the amplifier fails due to IGBT failure, control board fault, or communication error under normal operating conditions within that window, we replace it. Our QA testing proves the amplifier passed all power and control tests before it left our bench.

My spindle amplifier is showing an IPM alarm. Is it defective?
Not necessarily. An IPM (Intelligent Power Module) alarm typically indicates an internal short circuit, but it can also be triggered by a shorted spindle motor, damaged motor cables, or a failed regenerative resistor. Before replacing #, perform a megger test on the motor and check the motor cables for insulation breakdown. Only replace the amplifier if the motor and cabling test good.

Need me to pull up # wiring diagram or the Fanuc spindle parameter setup guide? That usually comes up right before final commissioning.