Description
🔧 Model Overview
A06B-6117-H256 is a FANUC Alpha i (αi) dual-axis servo amplifier module used in CNC and industrial automation systems.
⚙️ Full Technical Description
👉 A06B-6117-H256 = Alpha i Servo Amplifier (Model AiSV-20/40L), 2-axis
- Series: Alpha i (αi) Servo System
- Type: AC Servo Amplifier / Drive
- Axes: 2-axis (L & M channels)
- Model Class: 20/40L (unequal capacity with low-speed optimization)
This module:
- Drives two servo motors simultaneously
- Controls position, speed, and torque
- Interfaces with FANUC CNC via FSSB (fiber optic servo bus)
- Provides precise motion control for machine tool axes
🔩 Key Specifications (Typical)
- Configuration: Dual-axis (L & M channels)
-
Capacity Type:
- L-axis → 20 class (medium load)
- M-axis → 40 class (higher load)
- Model Variant: “L” type → optimized for low-speed, high-torque performance
- Series: A06B-6117 (αi servo amplifier family)
- Cooling: Fan-cooled (typical for αi drives)
🏭 Applications
- CNC machining centers
- CNC lathes
- Milling machines
- Industrial automation systems
- Machines where one axis requires higher torque than the other
🔍 Key Features
- ✔ Dual-axis amplifier (2 motors, one module)
- ✔ Mixed load capability (20/40)
- ✔ Low-speed torque optimization (“L” version)
- ✔ High precision and fast response
- ✔ Reliable for continuous industrial use
- ✔ Often supplied with core exchange requirement
📊 Position in A06B-6117 Series
| Model | Capacity |
|---|---|
| H255 | 20 / 20L |
| H256 | 20 / 40L |
| H205 | 20 / 20 |
| H206 | 20 / 40 |
| H207 | 40 / 40 |


