The A04B‑0099‑B309 Series 31i‑A controller belongs to Fanuc’s Series 30i/31i/32i family, positioned as a compact, high‑performance CNC system for modern machine tools and automation cells. It is engineered to provide smooth, high‑speed machining, precise multi‑axis control, and seamless integration with Fanuc drives, I/O, and safety‑related functions, making it suitable for machining centers, turning machines, and complex multi‑axis production systems.
This 31i‑A CNC controller typically features an integrated color display and control panel (one‑piece unit), with advanced PMC and CNC processing for fast interpolation, large‑block lookahead, and rich canned cycles. It supports multiple communication interfaces such as Ethernet, RS232, and USB, enabling easy program transfer, remote diagnostics, and network‑based data management. The unit is also compatible with FSSB servo drives and I/O Link i for robust I/O handling and flexible machine‑control logic.
Physically, the Fanuc A04B‑0099‑B309 is built as a compact, panel‑mountable CNC controller with a streamlined housing suitable for dense control cabinets. It is manufactured in Japan and supplied as a high‑quality tested or reconditioned unit, generally with a 12‑month warranty for new and 3‑month for used controllers. With short lead time (typically 3–7 days) and strong compatibility within the 31i‑A ecosystem, this Fanuc CNC controller is an excellent choice for CNC machine rebuilds, upgrades, and new‑build automation projects requiring a compact yet powerful control brain.
