Description
FANUC A20B‑3300‑0244 — Axis/Servo Control Module (Printed Circuit Board)
The A20B‑3300‑0244 is a servo/axis control printed circuit board (PCB) used inside industrial FANUC CNC controller systems. It’s part of the A20B‑3300 series of control boards, which are dedicated motion control modules that work with the CPU and I/O hardware in a CNC controller.
📌 What It Is
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Part Number: A20B‑3300‑0244
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Category: Axis/Servo Control Module (PCB) — motion control board.
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Function: Controls servo axis motion (position, speed, torque, and acceleration) in CNC machines by executing motion instructions from the controller CPU and communicating with servo amplifiers and feedback devices.
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Series: Part of the FANUC A20B‑3300 PCB family used in many FANUC i‑Series “B” CNC controllers (e.g., 16i‑B, 18i‑B, 21i‑B) and similar hardware setups.
🧠 Typical Role in CNC Systems
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📊 Motion Control: Works with other modules inside the controller rack to coordinate motion for one or more servo axes.
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🔌 Integration: Mounted on the controller’s backplane along with the main CPU board, display control cards, and I/O modules.
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🛠 Usage: Used in milling machines, lathes, machining centers, and other CNC machines where precise multi‑axis motion control is required.
⚙️ Notes & Practical Points
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📦 These modules are typically supplied new, refurbished, or repaired by industrial parts vendors.
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⚠️ If this board is replaced, machine parameters and backups should be managed carefully, because motion configuration data may need to be restored afterward.