YASKAWA USAMED-06BS1 AC SERVO MOTOR SPECIFICATION

USAMED-06BS1 is a classic discontinued permanent magnet AC servo motor belonging to Yaskawa USAMED series, developed to cooperate with traditional CACR series servo drivers for small CNC machine feed axes and medium-precision industrial automation equipment. The motor is constructed with totally enclosed natural convection cooling structure without auxiliary external cooling fan, integrated with built-in DC24V power-off electromagnetic holding brake and BS customized specification incremental encoder. Thanks to compact frame layout, low cogging torque and stable continuous torque performance, this model is specially suitable for vertical installation occasions that need power failure anti-drop protection and frequent cyclic start-stop positioning movement. The suffix BS represents factory exclusive customized encoder pin assignment and unique rear connector wiring layout made for matching designated servo units instead of universal standard wiring definition.

USAMED is the base series code for fully enclosed natural-cooling medium inertia servo motor; numeric code 06 corresponds to 0.6kW rated power grade; letter B indicates built-in DC24V fail-safe electromagnetic brake configuration; letter S stands for custom incremental encoder and exclusive terminal wiring specification for OEM matching application; there is no extra shaft structure suffix for this model, adopting standard single key solid output shaft design by default.

The motor is applicable for three-phase AC 200V to 230V industrial power input with 50Hz and 60Hz dual frequency compatibility. Its continuous rated output power is 0.6kW, rated running current is around 4.0A under full-load condition, fixed rated rotational speed at 3000rpm, and continuous rated torque reaches 1.91Nm. Instantaneous peak overload torque can reach three times the rated torque to satisfy heavy startup acceleration and sudden transient impact load from mechanical jogging movement.The built-in electromagnetic brake is powered by independent DC24V auxiliary supply; the brake releases the output shaft when energized and mechanically locks the shaft immediately once auxiliary power is disconnected, effectively preventing vertical mechanical components from sliding down due to gravity after unexpected power cut. The equipped differential line-drive incremental rotary encoder follows BS exclusive customized pin definition, which can directly connect to matched CACR servo amplifier without rewiring or parameter modification. Stator winding is manufactured in compliance with Class F insulation standard, and internal embedded temperature sensing element transfers overheat abnormal signal to paired servo drive to trigger automatic overload shutdown protection and avoid winding burnout under long-term overloaded running. Internal wiring cavity is fitted with surge suppression components to enhance anti-interference capability against industrial field instantaneous power surge and electromagnetic noise generated by surrounding inverter devices.

The whole motor housing is fully sealed with IP54 protection rating and depends entirely on shell natural heat dissipation without additional cooling fan. The drive end output shaft is standard solid shaft with integrated flat keyway for rigid coupling connection with small ball screw or miniature speed reducer. Due to the built-in brake module installed at rear end, the overall axial length is longer compared with non-brake same-power servo motors, and the net weight of complete unit is approximately 3.2kg with unified standard flange mounting dimension for convenient direct installation on equipment frame without extra adapting parts.Valid continuous working ambient temperature ranges from 0°C to +40°C, permissible storage temperature spans -20°C to +70°C during spare part storage period; applicable working relative humidity keeps within 5%RH to 80%RH under non-condensation environment to prevent internal circuit short circuit caused by dew accumulation. When installation altitude is higher than 1000 meters above sea level, continuous rated load should be properly derated to offset reduced natural cooling efficiency under thin air condition. The motor can bear standard industrial vibration within 10Hz to 55Hz frequency range; installation environment with corrosive chemical gas, continuous liquid splashing and dense conductive dust accumulation is strictly forbidden to extend service life of bearing, brake friction sheet and internal winding.

USAMED-06BS1 is originally matched with Yaskawa CACR medium-small power series servo amplifier, supporting two mainstream external command input modes including ±10VDC analog voltage speed instruction and differential pulse position command transmitted from upper CNC controller or industrial PLC host. The servo system supports free switching among position closed-loop control, speed closed-loop control and torque closed-loop control according to different production process requirements. Since it is equipped with built-in power-off brake, vertical installed equipment does not need to configure extra external mechanical locking fixture for anti-drop protection. As the configured encoder belongs to incremental type, complete mechanical origin homing operation is required after full power interruption to restore accurate zero position before formal equipment startup and production running.

Complete multi-layer safety protection is realized through cooperation between motor built-in sensing components and matched servo driver. Winding over-temperature signal triggers servo overload stop protection to avoid thermal damage of winding; open circuit or poor contact of encoder cable will activate dedicated encoder fault alarm displayed on servo panel; stator winding short-circuit and abnormal input overcurrent leads to hardware overcurrent protection and instant power cutoff; abnormal open or short circuit of brake coil will output auxiliary warning prompt on corresponding servo unit. All internal signal circuits are equipped with noise absorption parts to restrain electromagnetic interference from on-site frequency conversion equipment and improve operational stability of feedback signal.

Direct field replacement must adopt identical original USAMED-06BS1 spare part; non-brake variant or standard non-BS customized wiring motors cannot be directly substituted unless servo drive finishes full parameter reset and complete connector wiring rearrangement after replacement. Before disassembling for bearing inspection, brake maintenance or encoder overhaul work, operators need to fully cut off three-phase main power supply and DC24V brake auxiliary power, then wait no less than 15 minutes for full discharge of servo internal DC bus capacitor to eliminate residual high voltage and prevent electric shock accident.Regular maintenance items include tightening rear connector terminal screws every three months, supplementing high-temperature resistant bearing lubricating grease after accumulating 8000 continuous working hours and cleaning dust accumulated on motor casing every half year to keep original heat dissipation performance. Random modification on BS-defined encoder pin layout or internal brake wiring will cause uncontrolled motor runaway and permanent fault locking of matched servo drive.

This servo motor is widely used for X/Y small feed axes of miniature CNC lathes and bench type drilling-milling machines, indexing rotary table of small automated assembly production line, precision positioning drive of compact packaging equipment and customized lightweight non-standard automation machinery, especially suitable for vertical mounting working condition with medium cyclic load, frequent start-stop movement and strict power-off anti-drop positioning requirement.