USAFED-09FA1S is a classic F-series three-phase permanent magnet AC servo motor manufactured by Yaskawa Electric, developed to match CACR-SR series VS800 servo amplifiers including customized firmware variants like CACR-SR30SB, CACR-SRCA30BB with Y-suffix marking such as Y119 and Y124. This non-brake, natural air-cooled servo unit is widely configured for feed axis positioning control on CNC lathes, vertical machining centers and special automated production equipment, designed for frequent start-stop cyclic operation and medium-precision continuous load working conditions. The model belongs to discontinued legacy VS800 system servo lineup with stable torque output and robust mechanical structure for traditional numerical control machine retrofitting and after-market replacement usage.

USAFED stands for Yaskawa F-frame fully enclosed CNC dedicated servo motor series; digit 09 is power specification code corresponding to 0.85kW rated power rating; letter F denotes natural casing heat dissipation without auxiliary cooling fan; letter A represents non-electromagnetic holding brake structure with no internal brake assembly inside motor housing; digit 1 refers to plain smooth solid output shaft without built-in keyway; suffix S indicates factory-standard incremental line-drive encoder configuration with fixed internal wiring definition matched exclusively for designated customized CACR servo drives.

The motor adopts three-phase AC200V~230V 50/60Hz industrial power input standard. Continuous rated output power reaches 0.85kW with rated continuous operating current of 6.2A under full-load condition. Nominal rated rotational speed is fixed at 1500rpm, continuous rated output torque hits 5.39Nm equal to 55kg·cm, and instantaneous peak overload torque can reach three times of rated continuous torque within three seconds to satisfy heavy-load startup and rapid acceleration requirement.It is equipped with UTOPI-600UA differential line-drive incremental rotary encoder delivering 6000 pulses per revolution feedback signal, which is specially calibrated to connect CN2 encoder port of matching CACR-SR servo pack; S-type factory preset parameter restricts normal closed-loop operation only with paired customized servo drivers while universal standard CACR amplifiers cannot realize full functional control without internal firmware modification. Stator winding applies Class F insulation standard to guarantee stable insulation performance under long-term continuous operation.

Whole motor adopts fully enclosed housing structure with IP50 ingress protection grade, relying on housing natural convection cooling without external cooling fan setup. Output shaft is smooth plain solid shaft without key slot and no rear-end brake housing, which effectively shortens overall motor axial length compared with brake-equipped C-type counterpart such as USAFED-09CS2K. Net unit weight is approximately 4.8kg with standard flange mounting dimension for direct coupling connection with ball screw or speed reducer of machine feed axes.Allowable operating ambient temperature ranges from 0℃ to +40℃, and permissible storage temperature spans -20℃ to +70℃. Working environment relative humidity is limited within 5%~80%RH without internal condensation inside motor casing. When installation elevation exceeds 1000 meters above sea level, continuous load capacity needs proper derating to prevent overheat damage during long-hour running. The unit tolerates working vibration of 10Hz~55Hz with vibration amplitude below 0.5mm, and installation environment with corrosive gas, dense dust or continuous liquid splashing is strictly prohibited.

This servo motor only supports matching Yaskawa CACR-SR30SB and CACR-SRCA30BB series customized servo packs including Y119/Y124 locked firmware versions; non-custom standard CACR servo drivers cannot complete normal encoder matching and closed-loop control due to fixed S-type encoder preset parameters. Two mainstream control command modes are available via matched servo drive: ±10V analog voltage speed command and differential pulse position command transmitted from external CNC controller, which satisfies different speed adjustment and precision positioning demands for numerical control equipment.

Built-in stator winding temperature monitoring function transmits overheat feedback signal to paired servo drive to trigger overload protection automatically. Abnormal working conditions including encoder cable disconnection, internal winding short-circuit and long-time overloaded operation will trigger corresponding fault alarm codes displayed on servo panel: encoder wiring failure corresponds to fault code 6, continuous motor overload triggers fault code7, and stator short-circuit overcurrent leads to fault code1 alert. Since the motor has no built-in holding brake, external mechanical locking device is required for axis positioning locking during equipment power-off to avoid free sliding of moving components.

Direct replacement requires identical original model USAFED-09FA1S; variant models like USAFED-09CS2K with brake or different shaft specifications cannot substitute directly unless paired servo drive completes factory firmware rewrite and parameter resetting. Before disassembling for bearing inspection or encoder maintenance, cut off three-phase main power supply fully and wait over 15 minutes for servo internal DC bus capacitor complete discharge to avoid electric shock risk. Regular maintenance items include fastening encoder wiring terminals every three months and supplementing bearing lubrication grease after every 8000 running working hours; arbitrary modification of internal encoder pin definition or motor wiring will result in servo runaway and permanent drive fault locking.

Primarily used for X/Y/Z feed axis driving of small and medium-sized CNC lathe, bench vertical machining center, automatic feeding mechanism and non-standard customized numerical control automation machinery, applicable to medium-load repetitive frequent start-stop and high-repeat-precision positioning processing scenarios.