CACR-SR03BY1SF-C is a 0.3kW original Yaskawa AC Servopack from classic CACR-SR series, specially OEM customized for Yasnac CNC machine tools. It serves as feed axis drive for traditional CNC lathes and small machining centers and is exclusively matched with Yaskawa USAF series 300W incremental encoder servo motors. Original production has been discontinued, and this model is mainly used as replacement spare part for maintenance of old customized machine equipment. The suffix C stands for dedicated OEM customized program locked by factory for specific machine application.

CACR represents general series code of Yaskawa AC servo amplifier. SR is basic control platform supporting speed, position and torque control via internal parameter setup. 03 means rated continuous output power of 0.3kW. BY refers to customized main power board for 200V input grade with unique internal circuit design different from BE/BB types. 1S indicates S-type customized control board with fixed factory preset parameters. F stands for exclusive circuit matching USAF series servo motor encoder specification. C denotes OEM customized version with locked internal application parameters for designated machine tool.

Main power supply is three-phase AC 200V~230V with voltage tolerance +10%/-15% at 50Hz or 60Hz. Independent single-phase AC 200~230V is supplied for control circuit. 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℃ while storage temperature is between -20℃ and 85℃. Working humidity shall not exceed 80%RH without condensation. IP20 protection grade allows installation only inside control cabinet; environments with corrosive gas, heavy dust and oil mist are prohibited. IGBT sine-wave PWM driving technology is adopted for smooth motor operation.

Three control modes including speed, position and torque control are available. Key operational parameters are pre-programmed and locked at factory due to C-version OEM customization, arbitrary parameter modification is forbidden to guarantee matching with original CNC system. Optimized anti-interference circuit is integrated on control board to secure stable encoder signal transmission under complex industrial workshop conditions.Full complete protection functions cover overcurrent, overvoltage, undervoltage, overheat, regenerative circuit fault, encoder signal loss and CPU abnormal shutdown protection. Single seven-segment digital display on front panel shows real-time operating status and numerical fault alarm codes. Terminals P and N are reserved for external regenerative braking resistor connection for high frequent start-stop operation.

R, S, T terminals connect three-phase AC input power; U, V, W terminals link three-phase power cables of matched USAF servo motor; PE terminal must connect reliable protective ground following local electrical safety codes; P and N terminals are used for external brake resistor wiring.Control terminals receive ±10VDC analog command signal from Yasnac CNC controller. Digital input pins are arranged for servo enable and fault reset signals, and dry-contact relay output provides external fault alarm feedback. Special circular aviation connector is equipped for encoder wiring complying with SF-C customized pin definition standard.

Mount the servo drive vertically inside electrical cabinet, reserve enough clearance space at top and bottom for heat dissipation and avoid installation beside heat-generating components such as transformers and contactors. Carry out comprehensive wiring inspection before power-on to eliminate short-circuit risk. Thanks to factory pre-solidified customized parameters of C version, no large-scale parameter setting is needed during normal replacement installation. Complete no-load jog test to verify motor rotation direction and running stability before connecting mechanical load formally.

Cut off total input power and wait more than 10 minutes for residual high voltage discharge of internal capacitors before any disassembly or maintenance work to prevent electric shock accident. Clean cooling ventilation holes and fasten terminal screws every quarter to avoid poor contact caused by long-term vibration. When fault alarm appears on display, check sequentially input power fluctuation, motor mechanical jamming, loose encoder wiring and insufficient cabinet heat dissipation; do not repeatedly restart equipment until all faults are completely eliminated.

CACR-SR03BY1SF-C is a 0.3kW original Yaskawa AC Servopack belonging to the classic CACR-SR series. It is an OEM customized servo driver exclusively developed for Yasnac CNC systems and widely used for feed axis control on conventional CNC lathes and small machining centers. This model has been out of production and mainly serves as replacement spare part for maintenance of aged special machine tools. It is specially paired with Yaskawa USAF series 300W incremental encoder servo motors. The suffix C represents factory-locked OEM customized parameters for specific machine configuration.

CACR: General part number for Yaskawa AC servo amplifier.SR: Basic control platform supporting speed, position and torque control via internal parameters.03: Rated output power of 0.3kW.BY: 200V-class customized main power board with exclusive internal circuit design different from BB and BE specifications.1S: S-type customized control board with factory preset fixed parameters.F: Encoder circuit specially designed for USAF series servo motors.C: OEM custom version with locked application parameters for designated machine tools.

Main power input: 3-phase AC 200V~230V, +10%/-15% tolerance, 50/60Hz. The control circuit uses independent single-phase AC 200~230V power supply. Rated continuous output current is 3.0Arms, and peak transient overload current reaches 8.5Arms for short-time acceleration and deceleration.Operating ambient temperature: 0℃~55℃; storage temperature: -20℃~85℃; working humidity ≤80%RH with no condensation. Protection grade IP20, only for indoor cabinet installation; keep away from corrosive gas, heavy dust and oil mist environments. It adopts IGBT sine-wave PWM drive technology.

Three selectable control modes: speed, position and torque control. Core parameters are pre-locked at factory for C-version OEM requirement; random parameter modification is prohibited to keep compatibility with original CNC host. The control board is equipped with optimized anti-interference design to ensure stable encoder signal transmission.Full protection includes overcurrent, overvoltage, undervoltage, overheat, regenerative circuit failure, encoder signal missing and CPU error protection. A single 7-segment display on front panel shows running status and fault codes. Terminals P and N are reserved for external regenerative braking resistor connection.

R, S, T connect three-phase input power; U, V, W connect matched servo motor power lines; PE terminal must be reliably grounded according to local electrical standards; P/N terminals for external brake resistor wiring.Control terminal block receives ±10VDC analog instruction from Yasnac CNC controller, with digital input for servo enable and fault reset, and dry-contact relay output for external fault alarm. A dedicated round aviation connector is used for encoder wiring following SF-C customized pin definition.

Install vertically inside control cabinet and reserve upper and lower clearance for heat dissipation, avoid mounting close to heat sources such as transformers. Check all wiring before power-on to prevent short circuit. Pre-set factory parameters allow direct replacement without extra parameter programming. Perform no-load jog test to confirm rotation direction and stability before connecting mechanical load.

Cut off all power and wait over 10 minutes for capacitor residual high voltage discharge before maintenance to avoid electric shock. Regularly clean cooling vents and tighten terminal screws every three months. Once an alarm appears, check power fluctuation, motor mechanical jamming, loose encoder cable and poor heat dissipation in order; never restart repeatedly until faults are fully fixed.