Description
🔧 Fanuc A06B-6111-H002 Servo Amplifier Module – Description
A06B‑6111‑H002 is a FANUC spindle drive / spindle amplifier module from the αi (Alpha i) series, specifically designed for spindle motor control in CNC machines. It’s often sold with suffixes like #H550, #H553, #H570, but the base module is the same underlying hardware model.
📌 What This Module Is
- Type: Spindle amplifier / spindle drive unit
- Series: FANUC A06B‑6111
- Model: SPM‑2.2i (Alpha i series)
- Purpose: Controls and powers the spindle motor on a CNC machine — converting electrical power into precise spindle rotation control.
👉 In CNC systems, the spindle amplifier (sometimes called spindle drive) is a specialized drive that manages:
- Spindle motor speed and torque
- Acceleration / deceleration profiles
- Smooth high‑speed rotation
- Feedback signals for stable spindle operation
This unit replaces or repairs the part of the machine that directs power and control to the spindle motor — the component that rotates the cutting tool or workpiece.
⚙️ Key Characteristics
- ⭐ Servo Spindle Drive: Part of FANUC’s Alpha i family for spindle control
- ⚡ Power Handling: ~2.7 kW output with ~13 A output current (typical on H550 variants)
- 📊 Input: Often ~200–240 VAC (depending on machine configuration)
- 🌀 Control: Interfaces with the CNC control unit and spindle motor feedback systems for precise speed control
- 🔄 Versions: Common suffix variants include:
- #H550 – Standard SPM‑2.2i spindle module
- #H553 / #H570 – Other internal versions/revisions of the same model
🧩 Typical Use Case
This amplifier module is used on CNC machines where the main spindle (central rotating shaft) needs to be driven at precise speed and torque. It’s essential for milling machines, turning centers, machining centers, and other CNC equipment.
📌 Summary
A06B‑6111‑H002 is a FANUC Alpha i SPM‑2.2i spindle amplifier module used in CNC machines to drive and precisely control spindle motors. It is a crucial part of the machine’s motion and power system, ensuring controlled spindle rotation and smooth machining performance.

