Description
The A20B‑3300‑0247 is an axis/servo control printed circuit board (PCB) used inside industrial FANUC CNC controller systems. It belongs to the A20B‑3300 series of control boards, which provide motion control functions by coordinating servo motors and axis movements in CNC machines.
📌 What It Is
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Part Number: A20B‑3300‑0247
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Category: Servo/Axis Control Module (PCB) — dedicated motion control board.
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Function: Controls and executes servo axis movement by interpreting motion commands from the main controller CPU and communicating with servo amplifiers and feedback devices (like encoders).
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Series: Part of the FANUC A20B‑3300 family — motion control hardware used in FANUC CNC systems.
🧠 Typical Role in CNC Systems
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📊 Motion Control: Interfaces with the controller’s CPU and other modules to manage precise motion for one or more axes — essential for multi‑axis machining (e.g., milling machines, lathes, machining centers).
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🔌 Integration: Installed on the controller backplane or PCB rack along with other boards (CPU, I/O, display modules).
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🛠 Usage: Supports accurate position, speed, and trajectory control for servo motors based on CNC program instructions.
⚙️ Notes & Practical Information
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📦 These modules are typically supplied new, refurbished, or repaired by industrial parts vendors (availability depends on stock).
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⚠️ When replacing a servo/axis control PCB, it’s important to power off the controller, swap the board, and restore machine parameter backups afterward to preserve proper motion settings.