The A06B-6088 series is a high‑performance Alpha series spindle amplifier module (SPM) for FANUC CNC systems. It drives FANUC Alpha spindle motors, providing precise speed, torque, and position control for high‑speed, high‑precision machining. Common models include A06B-6088-H222 (SPM‑22), A06B-6088-H226 (SPM‑26), and A06B-6088-H255 (SPM‑55).

Input is DC bus 283–325VDC supplied by a FANUC power supply module (PSM). Rated power varies by model: SPM‑22 (25.2kW), SPM‑26 (29.8kW), SPM‑55 (66kW). Maximum output voltage is 230VAC, with rated output current of 95A (SPM‑22), 111A (SPM‑26). It uses PWM control and supports power regeneration to feed energy back to the power supply, reducing power consumption.

Mounting is vertical inside the control cabinet. Cooling uses an internal fan (A90L‑0001‑0422) and an external fan (A90L‑0001‑0335/B). Operating temperature ranges from 0°C to 50°C. Dimensions for SPM‑22/26 are 150mm (width) × 380mm (height) × 307mm (depth).

It works with FANUC Alpha spindle motors (Alpha22, AlphaP40, AlphaP50, a60 series). Compatible CNC systems include 0i‑C/D, 16i/18i/21i‑A/B, and Power Mate series. It uses fiber‑optic communication for reliable connection to the CNC and servo amplifiers.

It delivers stable high torque at low speeds and smooth high‑speed operation for heavy cutting and high‑precision finishing. The compact, rugged design saves cabinet space and withstands industrial vibration. Built‑in diagnostics and LED indicators enable real‑time monitoring and quick fault identification. It supports spindle orientation, rigid tapping, and constant surface speed control. Multiple protection functions include overcurrent, overvoltage, undervoltage, overtemperature, and fan fault.

AL‑01 indicates overcurrent in the spindle amplifier. AL‑02 means the cooling fan has stopped. AL‑03 signals overtemperature of the heat sink. AL‑04 shows DC bus undervoltage. AL‑07 represents DC bus overvoltage. AL‑20 indicates spindle motor overload.

Disconnect all power before installation or maintenance. Ensure the “CHARGING” LED is off before handling the module to avoid electric shock. Provide adequate clearance for ventilation and cooling. Securely fasten mounting screws to prevent vibration‑related issues. Regularly inspect fan operation, terminal tightness, and heat sink cleanliness. If an alarm occurs, stop the equipment immediately and check the spindle motor, wiring, and connected power supply module.

This spindle amplifier series is designed for high‑power CNC machining centers, heavy‑duty lathes, grinding machines, and multi‑axis industrial robots. It is also suitable for other industrial automation equipment requiring high‑precision spindle control.