The CACR-SR15BB1AF is a compact AC servo drive manufactured by Yaskawa, belonging to the classic CACR-SR series servo controller platform. This unit is designed for matching small-to-medium inertia Yaskawa servo motors, adopting fully digital closed-loop control architecture with high-speed response and stable torque output. It integrates power drive, position loop, speed loop and current loop control circuits in one integrated cabinet, featuring small installation footprint, strong anti-interference performance and flexible control mode switching. It is widely used in precision automation equipment that requires low speed constant torque and high positioning accuracy, and supports analog signal and pulse command dual control modes to meet different host controller docking demands.

CACR stands for Yaskawa standard servo drive series code; SR represents the medium capacity general servo sub-series with built-in standard braking circuit; 15 indicates the rated matching motor capacity of 1.5kW; BB stands for the hardware specification class including standard power circuit, single-phase/three-phase dual power input support and basic I/O terminal configuration; 1 means the first version of internal control firmware hardware; AF defines the global general specification variant, covering industrial standard voltage grade, no special customized function modification, compatible with international mainstream industrial control signal levels, without regional exclusive functional limitations.

The drive supports dual power input modes: single-phase 200V to 230V AC and three-phase 200V to 230V AC with allowable voltage fluctuation range of ±10%. The rated output current is 9.6A, maximum instantaneous output current reaches 28.8A for peak torque acceleration. Control loop response bandwidth can reach 400Hz, position loop resolution supports up to 1,310,720 pulses per rotation with high-precision encoder feedback matching. The operating ambient temperature ranges from 0°C to 55°C during continuous operation, storage temperature spans -20°C to 70°C, and relative humidity is limited within 5% to 90% non-condensing environment. Vibration resistance meets 10 to 2000Hz standard industrial vibration grade, and the protection level of the main unit is IP20 suitable for cabinet internal installation. Built-in overvoltage, undervoltage, overcurrent, overload, overheat, encoder disconnection and emergency stop multi-layer fault protection logic, with hardware fast interlock shutdown function. The weight of the whole servo drive is approximately 3.2 kilograms, with natural air cooling as the standard heat dissipation method.

Control command interfaces include differential pulse input channel for position command, analog voltage input channel covering 0 to ±10V for speed and torque command switching, and isolated digital input terminals for servo enable, alarm reset, origin search, limit switch signal reception. Digital output terminals provide servo ready, position completion, alarm output, speed arrival status signal feedback with relay isolation for external load driving. Encoder dedicated interface adopts dedicated shielded wiring terminal supporting incremental encoder signal reception with A/B/Z phase differential signal transmission. Standard communication configuration is built-in RS422 serial port for parameter setting, real-time status reading and fault record query via Yaskawa dedicated operator panel. No fieldbus communication card is equipped as standard; optional expansion modules can be installed on the internal slot to support serial bus communication docking upon demand. Power terminals include main power input, motor power output, external braking resistor connection terminals and grounding terminal, all equipped with lockable wiring terminals to prevent loose wiring during long-term operation. All signal interfaces are equipped with common-mode noise suppression circuits to reduce electromagnetic interference impact in complex factory wiring environments.

Multi-loop full digital closed-loop control realizes independent adjustable gain parameters for current, speed and position loops, supporting automatic gain tuning function to complete mechanical resonance suppression and gain matching without manual complex parameter adjustment. Three core control modes can be freely switched via parameter setting: position control for high-precision fixed-length positioning, speed control for stable constant speed operation, torque control for tension winding and pressure holding applications. Built-in electronic gear function allows arbitrary setting of electronic gear ratio to match different mechanical reduction structures without modifying mechanical parts. Origin return function supports multiple origin search modes including near-point dog and Z-phase signal trigger, with adjustable return speed and offset position parameters. Vibration suppression function filters mechanical low-frequency resonance through built-in notch filter to eliminate oscillation during high-speed start-stop. Instantaneous overload torque output function provides three times rated torque within short time to meet equipment rapid acceleration and heavy load startup requirements. Fault self-diagnosis function automatically records fault codes and operating status before alarm trigger for rapid troubleshooting, and supports alarm reset without power cycle in most minor fault scenarios.

This servo drive is applicable to medium-load precision automation machinery in general manufacturing industries. Typical equipment includes small stamping feeding machines, textile winding and unwinding equipment, packaging filling and cutting mechanisms, electronic product assembly indexing turntables, printing equipment paper feeding and registration axes, small CNC auxiliary feed axes, and automated testing positioning platforms. It fits production lines requiring medium power output, moderate dynamic response and flexible command signal docking, such as food processing automation equipment, rubber and plastic molding auxiliary motion axes, and logistics light load sorting conveying mechanisms. It can be deployed in workshop assembly lines, indoor automated test stations and enclosed cabinet integrated equipment, and is not suitable for high-dust, corrosive gas or continuous high-temperature severe industrial environments without additional protective measures.

Before power-on installation, confirm power supply voltage matches the drive rated specification, check all wiring terminals for firm connection, and separate power cables and signal cables with shielded wiring to avoid signal interference. Complete parameter initialization and automatic gain tuning after first installation, adjust limit speed, torque upper limit and soft start-stop parameters according to mechanical load characteristics to reduce mechanical impact. During daily operation, regularly observe drive panel indicator lights to judge operating status, green steady light indicates normal servo operation, red flashing light represents fault alarm. Regular maintenance cycle is set every three months for general working conditions: clean the heat dissipation air duct to remove accumulated dust blocking heat dissipation, check terminal wiring tightness, inspect encoder cable sheath for wear and damage. When faults occur, record fault code first, cut off power supply after confirming motor stops completely, then check corresponding wiring and load mechanical jamming problems according to fault definition. Long-term shutdown requires cutting off main power supply, and re-power on after 30 minutes of power-off storage to avoid internal circuit condensation short circuit. Do not disassemble the drive internal power module without professional maintenance authorization, internal high-voltage residual charge exists after power cut, wait at least 10 minutes before opening the cabinet cover for inspection. Avoid frequent repeated power-on and power-off operation within short intervals to prevent damage to the power rectifier circuit. Replace the built-in cooling fan when abnormal noise or slow rotation appears to prevent overheat shutdown failure. Store spare drives in dry, constant temperature warehouse with moisture-proof packaging to prevent circuit board oxidation failure.