Description
🔧 FANUC A06B-6111-H026 – Description
The A06B-6111-H026 is a very high-power spindle amplifier module from FANUC’s Alpha i (αi) series, designed to control large-capacity spindle motors in heavy-duty CNC machines.
📌 Basic Identification
- Part Number: A06B-6111-H026
- Type: Spindle Amplifier / Spindle Drive
- Series: Alpha i (αiSP series)
- Model: SPM-26i (aiSP-26)
- Application: High-power CNC spindle motor control
⚙️ Function
This module is the power and control unit for the spindle motor, responsible for:
- 🌀 Spindle speed (RPM) control
- ⚡ High torque output for heavy cutting loads
- 🔄 Acceleration & deceleration management
- 🎯 Closed-loop control using encoder feedback
👉 In simple terms:
It converts electrical power into controlled high-torque rotation for the spindle.
⚡ Technical Overview
- Power Class: ~26 kW (SPM-26i category)
- Input Voltage: Typically 200–240 VAC
- Output Current: Very high current capacity
- Interface: FANUC serial communication (FSSB)
- Cooling: Heavy-duty cooling (fan + heat sink)
🧩 Typical Applications
Used in:
- Large CNC machining centers
- Heavy-duty milling machines
- Large turning centers (lathes)
- Industrial machines requiring continuous high torque and power
🔧 Internal Construction
Inside the module:
- Power PCB: A16B-2203 series
- Control PCB: A20B-2100 series
- IGBT power modules: Handle high-power switching
- Cooling system: Ensures thermal stability
⚠️ Typically serviced as a complete module, not individual boards in field conditions.
🚨 Common Fault Symptoms
When faulty, you may see:
- Spindle not rotating
- High-load trips / overload alarms
- SP / ALM spindle errors on CNC
- Sudden stops during heavy cutting
- Drive fault indications on amplifier LEDs
📊 Position in FANUC Range
| Model | Power Level |
|---|---|
| H002 | 2.2 kW |
| H006 | 5.5 kW |
| H011 | 11 kW |
| H015 | 15 kW |
| H022 | 22 kW |
| H026 | 26 kW (very high power) |