Description
🔧 Description: FANUC A06B‑6117‑H205
FANUC A06B‑6117‑H205 is a dual‑axis AC servo amplifier (servo drive) module from the Alpha i (αi) series used in industrial CNC and automation systems. It is often referred to as the AiSV‑20/20i servo amplifier because it provides two equal‑capacity output channels for controlling two servo motors.
⚙️ Technical Overview
👉 Part Type: AC servo amplifier / drive module
👉 Series: FANUC Alpha i (αi)
👉 Model: AiSV‑20/20i (2‑axis amplifier)
👉 Axes: Dual‑axis control – drives two servo motor axes simultaneously.
This module receives motion commands from a FANUC CNC controller and supplies controlled power (current and voltage) to servo motors, enabling precise motion control essential for CNC machines (like milling, turning, machining centers) and automation applications.
📊 Key Specifications (Typical)
- Rated Input Voltage: ~283–339 V AC (3‑phase)
- Configuration: 2‑axis (L & M channels)
- Model Class: 20/20i – balanced power on both channels
- Typical Output Power: ~5 kW total system (approximate)
- Rated Output Current (each axis): ~6.5 A
- Cooling: Forced air cooling (fan‑cooled)
- Encoder Supported: Incremental feedback (INC)
- Mounting: Flange mount
đź’ˇ Key Features
- ✔ Dual‑axis amplifier — controls two servo motors with a single module.
- ✔ High precision motion control — essential for CNC axes movement.
- ✔ Designed for stable, reliable industrial use with built‑in protections and monitoring.
- ✔ Widely used with FANUC controllers like 30i, 31i and other i‑series.
- âś” Often supplied on a core exchange or repair basis due to industrial service practices.
đź§ Simple Explanation
👉 FANUC A06B‑6117‑H205 is basically the “power and control unit” in a CNC system that takes commands from the CNC controller and precisely drives two servo motors — handling acceleration, deceleration, positioning, speed and torque control for two axes.

