The A06B‑6121‑H030 spindle amplifier belongs to Fanuc’s Alpha iSP‑30HV (SPM‑30HVi) series, providing dedicated spindle control for high‑speed, high‑torque cutting applications. It receives three‑phase 565–679 V AC bus‑level input (via a matching 400‑V‑class power‑supply module) and outputs 480 V AC at up to 70 A to drive a single spindle motor, enabling high‑speed air‑cooling spindles and heavy‑cutting operations.
This Fanuc spindle amplifier includes advanced regenerative braking, torque control, and speed‑loop tuning to maintain precise spindle speed under load. It communicates with the CNC over Fanuc’s FSSB/serial bus and supports spindle‑sensor feedback for positioning‑mode spindle‑orientation. The compact module is panel‑mountable, typically paired with an Alpha i HV power supply (e.g., A06B‑6120‑Hxxx) in a shared drive rack.
Physically, the A06B‑6121‑H030 weighs about 12.0 kg and is built for high‑cycle, continuous‑duty use in metal‑cutting environments. It is manufactured in Japan and commonly sold with 12–24‑month warranties for new units and 3‑month warranties for tested or used modules. With in‑stock availability, it is suited for CNC rebuilds, spindle‑drive upgrades, and retrofit projects in machining centers, turning machines, and automation systems.
