CACR-SR03BC1KS-Y264 is a 0.3kW original Yaskawa AC servo driver from CACR-SR series, tailor-made with Y264 factory custom program for Yasnac VS-800 CNC system. It is specially configured for feed axis drive of customized CNC lathes and small machining centers. Production has been discontinued, and this model is mainly used as replacement spare part for repairing old machine tools. It supports matched 300W USAM and USAF series incremental encoder servo motors from Yaskawa.

CACR stands for Yaskawa AC servo amplifier series code. SR means basic speed control platform, which can switch to position and torque control by parameter setting. 03 refers to rated output power of 0.3kW. BC1 represents 200V grade main power board with unique circuit design different from BB1 version. KS is customized control board with exclusive encoder signal processing circuit. Y264 is OEM custom code with factory pre-locked internal parameters and fixed control logic for specified machine equipment.

The main power is three-phase AC 200V to 230V with voltage deviation of +10%/-15%, 50Hz or 60Hz. Control circuit uses independent single-phase 200~230V AC power. Its rated continuous output current is 3.0Arms and peak overload current reaches 8.5Arms for short-time acceleration and deceleration.The applicable operating temperature ranges from 0℃ to 55℃, storage temperature is from -20℃ to 85℃, and working humidity should be less than 80% without condensation. It is IP20 protection grade and only allowed to install inside control cabinet, away from corrosive gas, heavy dust and oil mist. IGBT sine-wave PWM drive is adopted to guarantee smooth motor running.

Three control modes including speed, position and torque control are available. Key parameters are solidified by Y264 factory setting to match ±10VDC analog instruction output from CNC host, and random parameter revision is not permitted. KS control board is optimized with good anti-interference performance for encoder signal transmission.Complete protection functions include overcurrent, overvoltage, undervoltage, overheat, regenerative fault, encoder missing signal and CPU failure protection. A single digital display on front panel shows running status and fault codes for quick maintenance. Terminals P and N are reserved for external regenerative braking resistor connection.

R, S, T connect three-phase input power, U, V, W connect servo motor three-phase lines, and PE terminal must connect reliable protective ground as required by safety rules. P and N are used for external brake resistor wiring.Control terminals receive ±10V analog command from CNC controller, with digital signals for servo enable and fault reset, and dry contact output for external alarm feedback. A special round connector is used for encoder wiring according to KS-Y264 customized definition.

Install the servo vertically inside cabinet and keep enough space up and down for heat dissipation, never install close to heating components such as transformers. Check all wiring before power on to avoid short circuit. No full parameter setting is needed during normal replacement due to fixed factory parameters. Carry out no-load test run to check rotation direction and stability before connecting mechanical load.

Cut off power and wait over 10 minutes for residual high voltage discharge before maintenance to prevent electric shock. Clean ventilation holes and fasten terminal screws regularly every quarter. When alarm appears, check power supply fluctuation, mechanical blocking, loose encoder wire and poor heat dissipation step by step, do not restart repeatedly until faults are removed.