CACR-SR03BE12M is a 0.3kW original Yaskawa AC Servopack from the traditional CACR-SR series, designed to cooperate with Yasnac VS-800 CNC system for feed axis driving on old CNC lathes and small machining centers. Mass production has been stopped, and this servo unit is mostly used as replacement spare part for equipment maintenance. It is matched with Yaskawa USAM and USAF series 300W incremental encoder servo motors with fixed encoder pin definition for M version control board.

CACR is the general series code of Yaskawa AC servo amplifier. SR stands for basic speed control platform supporting speed, position and torque control via internal parameter adjustment. 03 means rated output power of 0.3kW. BE refers to dedicated 200V-class main power board with unique internal power circuit layout. 12 represents 12-pin standard aviation connector for encoder wiring. M indicates customized control board with exclusive preset internal parameters and dedicated encoder signal processing circuit different from G type.

Three-phase AC 200V~230V is used for main power input with voltage tolerance of +10%/-15% and 50/60Hz frequency, while the control circuit adopts independent single-phase AC 200~230V power supply. The rated continuous output current is 3.0Arms and peak instantaneous overload current reaches 8.5Arms for short-time acceleration and deceleration. Operating ambient temperature ranges from 0℃ to 55℃ and storage temperature from -20℃ to 85℃, with working humidity below 80%RH without condensation. The unit is IP20 rated and only allowed to be installed inside control cabinet, avoiding surroundings with corrosive gas, heavy dust and oil mist. IGBT sine-wave PWM driving technology is adopted.

Three control modes including speed control, position control and torque control are available. Partial core parameters are preset and fixed by factory for M version to match original CNC equipment, and arbitrary parameter change is not recommended. The control board features optimized anti-interference circuit for stable encoder signal transmission under complex workshop environment.Built-in complete protection functions cover overcurrent, overvoltage, undervoltage, overheat, regenerative circuit error, encoder signal loss and CPU abnormal protection. Single seven-segment digital display on front panel shows real-time running status and numeric fault codes. Terminals P and N are reserved for external regenerative braking resistor connection.

Terminals R, S, T connect three-phase input power source; U, V, W connect three-phase lines of matched servo motor; PE terminal must be reliably connected to equipment protective ground in accordance with local electrical safety regulations; P and N are used for external brake resistor wiring.Control terminals receive ±10VDC analog command signal from Yasnac CNC controller, equipped with digital input for servo enable and fault reset as well as dry-contact relay output for external fault alarm feedback. A dedicated 12-core round aviation connector is configured for encoder wiring following M-version specification.

Mount the servo vertically inside electrical cabinet and reserve enough clearance at top and bottom for heat dissipation, keep away from heat-generating parts such as transformers and contactors. Inspect all power and control wiring thoroughly before power supply to prevent short circuit. No large-scale parameter modification is needed for normal replacement due to factory preset parameters. Complete no-load jog test to confirm motor rotation direction and operating stability before connecting mechanical load.

Cut off main power and wait more than 10 minutes for internal capacitor residual high voltage discharge before any maintenance work to prevent electric shock. Clean cooling vents and tighten terminal screws regularly every quarter. When alarm code appears, check input power stability, motor mechanical jamming, loose encoder cable and poor heat dissipation in sequence, stop repeated startup until the fault is removed.

CACR-SR03BE12M is a 0.3kW original Yaskawa AC Servopack from CACR-SR series, specially configured for Yasnac VS-800 CNC system and used as feed axis driver on conventional CNC lathes and small machining centers. Original production has been discontinued, and this servo is mainly applied as replacement spare part for old equipment maintenance. It matches Yaskawa USAM and USAF 300W incremental encoder servo motors with exclusive M-version control board setting.

CACR refers to Yaskawa AC servo amplifier series code. SR is basic speed control platform supporting speed, position and torque control by parameter setup. 03 stands for rated output power 0.3kW. BE represents 200V grade main power board with dedicated internal circuit design. 12 means 12-pin round aviation connector for encoder cable. M denotes customized control board with factory pre-set fixed parameters and exclusive encoder signal circuit different from standard G-type version.

Main power input is three-phase AC 200V~230V with ±10%/-15% tolerance at 50/60Hz; control power uses independent single-phase AC 200~230V. Rated continuous output current is 3.0Arms and peak overload current reaches 8.5Arms for short-time acceleration and deceleration. Operating temperature ranges 0℃~55℃, storage temperature -20℃~85℃, working humidity ≤80%RH without condensation. IP20 protection grade for cabinet indoor installation only; environments with corrosive gas, dust and oil mist are forbidden. It adopts IGBT sine-wave PWM drive technology.

Three optional control modes: speed, position and torque control. Key parameters are pre-locked at factory for M customization to match designated CNC equipment, random parameter modification is not allowed. The control board is optimized for anti-interference to ensure stable encoder signal transmission in complicated industrial environment.Full protection functions include overcurrent, overvoltage, undervoltage, overheat, regenerative circuit failure, encoder disconnection and CPU fault protection. Front single digit display shows operating status and fault codes; P and N terminals are reserved for external regenerative braking resistor connection.

R, S, T connect three-phase input power; U, V, W connect servo motor three-phase leads; PE must connect reliable protective ground complying with local electrical codes; P/N for external brake resistor wiring.Control terminals receive ±10VDC analog command from CNC controller, with digital input for servo enable and fault reset, dry-contact output for external alarm feedback. The 12-core dedicated circular connector follows M-version pin definition for encoder connection.

Install vertically inside control cabinet and reserve enough top and bottom space for heat dissipation, away from heat-generating components such as transformers. Check all wiring before power on to avoid short circuit. Factory preset parameters eliminate large-scale parameter setting during replacement; perform no-load jog test to check rotation direction and stability before loading mechanical structure.

Disconnect main power and wait more than 10 minutes for capacitor residual high voltage discharge before maintenance to avoid electric shock. Clean cooling slots and tighten terminal screws quarterly. When alarm occurs, check input voltage fluctuation, motor mechanical jam, loose encoder wiring and poor heat dissipation sequentially; do not restart repeatedly until faults are fixed.