USAFED-09FB1-S is a discontinued classic three-phase permanent magnet AC servo motor belonging to Yaskawa F-series VS800 servo system, specially designed to match customized CACR-SR30 and CACR-SRCA30BB servo drivers marked with Y119/Y124 firmware suffix. Equipped with built-in electromagnetic holding brake and natural casing self-cooling structure, this servo motor is widely deployed on feed axes of CNC lathes, vertical machining centers and automated production machinery for precision positioning and intermittent cyclic operation. The S suffix denotes factory customized incremental encoder wiring definition exclusively paired with designated modified servo amplifiers, which cannot work normally with standard non-custom CACR drives without parameter and firmware revision.

USAFED stands for Yaskawa fully enclosed F-series CNC dedicated servo motor platform; numeric code 09 refers to rated 0.85kW power grade; letter F represents natural convection cooling without external cooling fan; letter B indicates integrated internal electromagnetic power-off holding brake assembly; digit 1 means solid smooth output shaft without shaft keyway; trailing S stands for original factory specified incremental encoder configuration and fixed cable pin assignment for special customized servo packs.

The motor is rated for three-phase AC 200V~230V input power at 50Hz and 60Hz industrial frequency. Its continuous rated output power is 0.85kW with rated full-load operating current at 6.2A, rated continuous rotational speed fixed at 1500rpm and continuous rated torque of 5.39Nm. Instantaneous peak overload torque can reach three times rated torque within short period to satisfy heavy-load startup and rapid acceleration requirements. It is fitted with UTOPI series differential line-drive incremental rotary encoder delivering 6000 pulses per revolution feedback signal, the S-type factory fixed encoder protocol limits closed-loop control only with matched customized CACR servo units. Stator winding adopts Class F insulation standard to guarantee stable dielectric performance under long continuous running status. The built-in electromagnetic brake uses independent single-phase brake power supply around AC90V~AC100V for reliable shaft locking after main power cut-off.

Full enclosed motor housing features IP50 protection rating and relies on housing natural heat dissipation without auxiliary fan installation. The output shaft is plain solid shaft without key slot, and extra rear brake housing extends overall axial length compared with non-brake counterpart USAFED-09FA1S. The net weight of whole unit is approximately 5.2kg with standard flange mounting dimension for direct coupling to ball screw or speed reducer of machine feed axes. Allowable working ambient temperature ranges 0℃ to +40℃, permissible storage temperature spans -20℃ to +70℃, and working relative humidity is controlled from 5% to 80%RH with no internal condensation allowed inside motor enclosure. Derating on continuous output load is required when installation altitude exceeds 1000 meters above sea level to avoid overheating failure. Operating environment with corrosive gas, excessive dust and continuous liquid splash is prohibited strictly.

This brake-type servo motor only supports paired Yaskawa CACR-SR30SB and CACR-SRCA30BB customized servo drivers with Y119/Y124 dedicated program code; regular standard CACR amplifiers fail to realize complete closed-loop positioning control due to exclusive S-series encoder definition. Two mainstream control command modes are available via matched servo drive: ±10V analog voltage speed instruction and differential pulse position command from external CNC controller, adapting different speed adjustment and high-precision positioning requirements of numerical control equipment. The internal brake is automatically powered off to release shaft when servo main power is energized and locks output shaft immediately once main supply cuts off for preventing axis sliding on machine tools.

Built-in winding temperature detection circuit transmits overheat signal to paired servo drive to activate automatic overload protection. Common abnormal conditions including encoder cable breakage, stator winding short-circuit and long-term overloaded operation trigger corresponding fault codes on servo panel: encoder disconnection corresponds to fault No.6, continuous overload triggers fault No.7, winding short-circuit overcurrent leads to fault No.1 alarm. Brake coil short or open circuit will also trigger auxiliary fault warning on matched driver. External mechanical auxiliary locking is unnecessary for power-off position holding thanks to integrated internal electromagnetic brake design.

Direct field replacement needs identical USAFED-09FB1-S original model; non-brake variant USAFED-09FA1S or different shaft specification motors cannot substitute directly unless paired servo drive completes factory firmware rewrite and full parameter reset. All three-phase main power and brake control power must be fully disconnected and wait over 15 minutes for servo internal DC capacitor full discharge before any disassembly maintenance on bearing, brake coil or encoder to prevent electric shock hazard. Periodic maintenance items include tightening encoder terminal wiring every three months and replenishing bearing grease after every 8000 cumulative operating hours; arbitrary modification on encoder pin definition and internal wiring will cause servo runaway and permanent drive lockout fault. Regular brake performance inspection is required every half year to check holding torque and release responsiveness of built-in brake structure.

Primarily applied on X/Y/Z feed driving axes of medium and small CNC lathes, bench machining centers, automatic feeding equipment and non-standard customized automation machinery, especially suitable for vertical-axis installation scenarios which need power-off anti-drop locking via internal brake, matching medium-load frequent start-stop and high repeat precision positioning processing working conditions.