CACR-SR03SZ1SS is discontinued original Yaskawa 0.3kW AC Servopack belonging to classic CACR-SR series, specially matched with Yasnac VS-800 CNC system for feed-axis driving of old CNC lathes and small precision machining equipment. This standard universal servo driver is designed to pair with Yaskawa USAF series 300W incremental encoder servo motors without OEM parameter locking; all core gain and control parameters support free onsite modification during commissioning, mainly used for old machine maintenance replacement and aftermarket spare parts supply.

CACR = general series code of Yaskawa early AC servo amplifier; SR = multi-control platform configurable for speed, position and torque control via internal parameter setup; 03 = rated rated output power 0.3kW; SZ = customized main power board specification for 200V grade input with dedicated internal circuit layout distinct from SB/BB variants; 1SS = exclusive S-type control board plus standard SS-spec incremental encoder feedback interface dedicated for USAF-series servo motors.

Main circuit input: three-phase AC 200V~230V, voltage tolerance +10%/-15%, 50Hz/60Hz; independent single-phase AC 200~230V for control circuit power supply. Rated continuous output current: 3.0Arms, transient peak overload output current reaches 8.5Arms for acceleration and deceleration short-time load. Working ambient temperature: 0℃~40℃, storage temperature: -20℃~85℃, permissible operating humidity ≤80%RH with no condensation; protection class IP20, only allowed to be installed inside electrical cabinet away from corrosive gas, heavy dust and oil mist; max applicable working altitude below 1000m above sea level. It adopts IGBT sine-wave PWM drive technology and receives ±10VDC analog speed/position command signal from Yasnac CNC controller as main control instruction.

Three optional control modes (speed, position, torque) selectable by internal parameter setting. Standard ±10V analog voltage command input for CNC host linkage, incremental encoder closed-loop feedback matching default 5000PPR USAF servo motor as factory preset configuration. Complete full-range protection functions including overcurrent, overvoltage, undervoltage, overheat, regenerative circuit breakdown, encoder signal loss and CPU abnormal alarm protection; single seven-segment digital display on front panel displays real-time running state and numeric fault codes for quick field troubleshooting; P and N reserved terminals on power terminal block for external regenerative braking resistor wiring per mechanical design requirement.

R/S/T terminals connect three-phase main input AC power; U/V/W terminals link three-core power cable of matched USAF 300W servo motor; PE terminal must implement reliable protective grounding complying with local electrical safety codes; P/N terminals are used for external brake resistor wiring connection. Control terminal block receives analog command signal from CNC system together with digital input signals for servo enable and fault reset; built-in dry-contact relay outputs fault alarm feedback signal to CNC cabinet; dedicated round aviation connector serves as fixed wiring port for incremental encoder following SS pin definition standard.

Mount the servo vertically inside control cabinet with sufficient upper and lower gap reserved for heat dissipation, keep proper distance from heat-generating components such as transformers and AC contactors. Execute full wiring inspection before power-on to avoid short-circuit damage caused by wrong wiring. No fixed locked factory parameters for standard CACR-SR03SZ1SS, complete no-load jog test to verify motor rotation direction and stable operation before connecting mechanical load, adjust gain parameters onsite according to actual running performance if needed.

Cut off all input power and wait no less than 10 minutes to fully discharge residual high voltage of internal electrolytic capacitors before any disassembly and maintenance work to prevent electric shock risk. Regularly clean cooling ventilation openings and retighten loose terminal screws every three months. Once alarm code pops up, sequentially check input power fluctuation, motor mechanical blocking, loose encoder wiring and insufficient cabinet heat dissipation; eliminate hidden faults thoroughly before repeated power-up operation.