Description
🔧 A20B-2100-0800 — Description
📌 Full Technical Description
A20B-2100-0800 is a FANUC Alpha i spindle drive control PCB used in CNC spindle amplifier modules (aiSP / SPM series).
- Manufacturer: FANUC
- Part Number: A20B-2100-0800
- Type: Spindle drive control board (Type A / Type 1 PCB)
- Series: A20B-2100
- Application: CNC spindle amplifier (Alpha i series)
⚙️ Function (What it does)
- Acts as the main control PCB inside the spindle amplifier
- Handles:
- Spindle motor control logic
- Communication between CNC controller and spindle drive
- Internal signal processing and monitoring
- Coordination of power and feedback systems
👉 In simple terms:
It is the “brain board” of the spindle drive, controlling how the spindle motor operates.
🔍 Technical Role (Confirmed)
- Identified as:
- “Spindle drive control PCB”
- “Alpha i spindle module control PCB (Type A)”
- Used specifically in:
- Alpha i spindle modules (aiSP / SPM series)
- Power range: approx. 2.2 kW to high-power spindle systems
🏭 Where it is used
- Installed inside:
- FANUC Alpha i spindle amplifiers
- Systems like:
- A06B-6141 series
- A06B-6111 series
- Used in:
- CNC machining centers
- CNC lathes
- Milling machines
🧩 Key Characteristics
- Internal PCB (not standalone)
- Type: Type A spindle control board
- Works with:
- CNC controller (A20B / A16B boards)
- Spindle motor via amplifier
- Often paired with:
- Power supply modules (Alpha i PS)
- Servo systems (aiSV)
⚠️ Important Notes
- ❗ Discontinued by manufacturer
- ❗ Not supplied separately in many cases (part of full amplifier)
- ❗ Must match:
- Exact spindle amplifier model
- Machine configuration
Common failure symptoms:
- Spindle not rotating
- Spindle drive alarm
- CNC–spindle communication fault
👍 Summary
A20B-2100-0800 = FANUC Alpha i spindle drive control PCB
➡️ Core control board inside spindle amplifier
➡️ Controls spindle motor operation and communication
➡️ Used in A06B-6141 / aiSP spindle systems