Servo Motor In Good Condition A06B-0202-B000 A06B0202B000 AO6B-O2O2-BOOO

FANUC A06B-0202-B000 | Alpha iF 1/5000 AC Servo Motor — Taper Shaft / A1000 Absolute / No Brake

αiF 1/5000 — Where One Newton-Metre Is Exactly Right

Some axes do not need high stall torque. Tool magazine indexing mechanisms, ATC arm drives, compact rotary positioning tables, and secondary positioning axes on multi-axis machining centres move light loads quickly and stop precisely. The αiF 1/5000 is built for that requirement: 1 Nm of stall torque, 5,000 rpm maximum speed, 0.5 kW output in a compact package.

On a 5mm pitch ball screw in direct coupling, 4,000 rpm rated speed produces 20 m/min traverse. For a lightweight auxiliary axis, that is genuine axis speed without oversizing the motor and adding unnecessary mass to the driven mechanism. The 95% power factor means the motor draws minimal reactive current — a practical advantage on machines where multiple servo axes share a common supply.

The taper shaft self-centres the coupling hub during installation with a draw bolt through the shaft-end thread. The key transmits torque through positive mechanical engagement. At 1 Nm, the load is modest — but the coupling repeatability that comes from taper-plus-key is the practical benefit: when the motor is removed and reinstalled during maintenance, the hub reseats in the same geometry every time without realignment.

No brake is correct for horizontal axes and balanced mechanisms where FANUC servo lock maintains position at rest. The servo amplifier continuously corrects to the commanded shaft angle from 1,000,000 encoder counts per revolution. Vertical or gravity-loaded axes require the B300 variant with a spring-applied 24V brake.

Key Specifications

A1000 Absolute Encoder — No Homing at Power-Up

The A1000 is a serial absolute encoder retaining multi-turn shaft position through power-off via the backup battery in the αi servo amplifier. At power-on, the CNC reads the axis coordinate immediately — no reference-return cycle, no supervised homing traverse. For machines that cycle power between shifts or recover from a power interruption, this means the machine resumes exactly where it stopped.

The backup battery is in the servo amplifier, not in the motor. Replace it when the CNC issues a low-battery alarm — a depleted battery resets the multi-turn counter and requires a one-time position synchronisation before production resumes.

A06B-0202 Variant Summary

Match the exact suffix to the motor being replaced. Encoder type and brake configuration are not interchangeable without parameter changes and wiring modifications.

FAQ

Q1: What applications suit the αiF 1/5000 (A06B-0202-B000)?

Tool magazine indexing mechanisms, ATC arm drives, compact rotary positioning tables, and secondary positioning axes on multi-axis machining centres — applications where light loads move quickly and stop precisely. On a 5mm pitch ball screw in direct coupling, 4,000 rpm rated speed produces 20 m/min traverse. The αiF 1/5000 is for auxiliary and secondary axes, not primary cutting axis drives.

Q2: Does this motor require a homing cycle at every power-up?

No. The A1000 is a serial absolute encoder — multi-turn position is retained through power-off by the backup battery in the αi servo amplifier. The axis coordinate is available immediately at power-on without any axis movement. After installing a replacement motor, one position synchronisation is required to match the absolute counter to the machine coordinate — a standard commissioning step, not a recurring homing requirement.

Q3: Which amplifier pairs with the A06B-0202-B000?

FANUC αi series servo amplifiers (αiSV). At 0.5 kW / 1 Nm, the αiSV 4 covers the power level. Compatible CNC: Series 0i-D/F, 16i, 18i, 21i, 30i/31i/32i. Not compatible with original α series (non-i) amplifiers or FANUC β series drives.

Q4: Can this B000 (no brake) replace a B300 (brake version)?

Only if the original motor was confirmed to be a B000. The B300 brake is fitted on vertical or gravity-loaded axes where mechanical holding is required at servo-off. Removing the brake function from those axes creates a safety hazard. Confirm the failed motor's original suffix from the machine documentation before fitting a brakeless replacement.

Q5: Is the αiF 1/5000 the smallest motor in the FANUC αiF series?

Yes. The αiF family steps up through αiF 2/5000 (2 Nm, A06B-0205), αiF 4/5000 (4 Nm, A06B-0223), and larger models. All share the same αi serial encoder interface. If the axis demands more than 1 Nm sustained stall torque, the next step is αiF 2/5000. Confirm the amplifier current rating and motor type parameters are compatible with any larger motor before swapping.