The CACR-SR05BA1AM is a compact full-digital AC SERVOPACK from Yaskawa CACR-SR general servo series, designed to match 0.5kW low-inertia small servo motors for light-load precision automation equipment. It adopts three-loop full digital closed-loop control architecture, integrating power drive, signal processing and motion control circuits into a mini cabinet-mounted unit. This model supports dual AC power input and dual command control modes including analog signal and differential pulse, featuring ultra-low speed steady torque output, quick response and strong anti-interference performance. With simplified standard I/O terminals and small overall size, it is widely used for small positioning axes requiring high precision and low power, and offers stable motion control for light-duty automated production machinery.

CACR: Standard series code of Yaskawa AC servo drive SERVOPACKSR: General medium-speed response servo sub-series with internal standard braking circuit05: Rated matching motor power, 0.5kWBA: Universal standard hardware specification; dual single/three-phase 200V power input, basic simplified digital I/O terminal layout, wall-mounted cabinet structure1: First-generation main control board hardware versionAM: Global general industrial specification variant, standard international signal level, no customized OEM I/O definition, compatible with mainstream PLC and motion controllers worldwide

Input power supports single-phase 200–230V AC or three-phase 200–230V AC, with allowable voltage fluctuation of ±10%. Rated continuous output current is 4.2A, peak instantaneous output current reaches 12.6A to provide three times rated short-time overload torque for quick startup and acceleration. The maximum control loop bandwidth reaches 380Hz, compatible with high-resolution incremental encoders up to 1,310,720 pulses per rotation. Continuous operating ambient temperature ranges from 0°C to 55°C; storage temperature covers -20°C to 70°C, relative humidity limited to 5%–90% without condensation. The unit protection grade is IP20 for installation inside electrical cabinets, vibration resistance conforms to general industrial 10–2000Hz standard. Comprehensive built-in protection functions include overvoltage, undervoltage, overcurrent, overload, overheating, encoder disconnection, emergency stop hardware interlock and braking circuit fault detection. Standard heat dissipation is natural air convection, and the total weight of the servo drive is approximately 1.6kg.

Position command channel adopts differential pulse input with strong anti-interference for high-precision positioning. 0 to ±10V analog voltage input supports parameter switching between speed command and torque command modes. Isolated digital input terminals receive servo enable, alarm reset, origin search, positive and negative travel limit signals. Digital output terminals adopt relay isolation to feed back servo ready, positioning completion, speed arrival and fault alarm status signals to external control devices. A dedicated encoder terminal block is equipped for A/B/Z phase differential incremental encoder signals, matched with shielded wiring to reduce signal attenuation. The unit carries an embedded RS422 serial communication port, used together with Yaskawa dedicated handheld operator to complete parameter modification, real-time operating status reading and fault record query. No fieldbus communication card is pre-installed; optional expansion modules can be added to realize bus communication docking as required. Power terminal blocks include main power input, motor power output, external braking resistor interface and safety grounding terminal, all equipped with locking structures to prevent wiring loosening during long-term operation. All signal interfaces are fitted with independent common-mode noise suppression circuits to adapt to complex electromagnetic wiring environments on production lines.

Independent adjustable gain parameters for current, speed and position closed loops, equipped with automatic gain tuning function to quickly match mechanical characteristics and suppress low-frequency mechanical resonance without complicated manual parameter adjustment. Three control modes can be freely switched via parameter settings: position control for high-precision fixed-length positioning, speed control for stable constant-speed operation, torque control for tension control and pressure holding applications. Built-in electronic gear function supports arbitrary gear ratio setting to adapt to different mechanical reduction structures without modifying mechanical parts. Multiple homing modes are available including proximity switch homing and encoder Z-phase signal homing, with adjustable homing speed and position offset parameters. Multi-stage notch filters effectively eliminate mechanical oscillation during acceleration and deceleration. Short-time triple overload torque output meets the rapid acceleration demand of light-load small axes. Integrated fault self-diagnosis function automatically records fault codes and pre-alarm operating data to facilitate rapid troubleshooting; most minor faults support remote alarm reset without power cycle, while serious hardware faults require power-off restart to clear alarms. The internal braking circuit realizes energy consumption braking during deceleration, and external braking resistors can be expanded for equipment with frequent reciprocating motion.

This servo drive targets low-power light-load precision automation equipment in various manufacturing industries. Typical equipment includes small electronic component indexing turntables, miniature packaging cutting mechanisms, desktop automatic testing positioning platforms, small printing paper feeding axes, miniature textile winding equipment, and auxiliary feeding axes of small automation assembly lines. It is suitable for indoor closed electrical cabinet installation in ordinary workshop environments, applicable to light-load motion axes with low power demand and high positioning accuracy. Additional sealed protective enclosures must be configured if deployed in high-dust, corrosive gas or long-term high-temperature environments; it is not suitable for heavy-load, high-frequency impact mechanical equipment. As a general standard mass-production model, it can be used for both new equipment development and old equipment maintenance replacement.

Before power-on installation, confirm the power supply voltage matches the rated specification of the drive, fasten all wiring terminals tightly, and separate power cables and signal cables with full shielding to avoid signal interference. After initial installation, complete parameter initialization and automatic gain tuning, then adjust speed limit, torque upper limit and soft start-stop parameters according to actual mechanical load to reduce mechanical impact. During daily operation, judge the running state through front panel indicator lights: steady green light represents normal servo operation, flashing red light indicates fault alarm and displays corresponding fault codes. Under standard workshop conditions, perform routine maintenance every three months: clean the heat dissipation air duct to remove accumulated dust affecting heat dissipation, recheck the tightening torque of all wiring terminals, and inspect encoder cable outer sheath for abrasion and cracking. When a fault occurs, record the fault code first, cut off the main power supply after the motor completely stops, then check wiring faults, mechanical jamming and encoder damage according to fault definition descriptions. For long-term shutdown of equipment, disconnect the main power supply; wait more than 30 minutes before re-powering to prevent short circuits caused by internal circuit condensation. Do not disassemble the internal power module and control board without professional maintenance permission; high-voltage residual charge still exists inside after power cut, wait at least 10 minutes before opening the drive housing for inspection. Avoid frequent repeated power-on and power-off within a short time to protect the internal rectifier circuit. Store spare servo drives in dry constant-temperature warehouses with moisture-proof packaging to prevent circuit board oxidation and circuit failure.