CACR-SR07AC1ER
CACR refers to classic Yaskawa Yasnac VS800 full digital AC SERVOPACK servo amplifier series for conventional CNC machine tools. SR stands for universal servo unit with three configurable control modes including position, speed and torque via internal parameter adjustment. 07 represents rated matched motor power of 0.7kW with continuous rated output current at 7.6A RMS. A denotes standard universal main control PCB without customized hardware design. C means the drive accepts only ±10VDC analog speed or torque command input, and differential digital pulse positioning input is not available on this model. 1 indicates standard original factory firmware and universal default parameter group without OEM locked settings. E stands for encoder interface specially matched with Yaskawa USAREM series incremental encoder motors. R means rack type structural specification with exclusive mechanical outline for specified installation form and supporting corresponding R-type servo motors.
Description
1. Model Code Definition
CACR refers to classic Yaskawa Yasnac VS800 full digital AC SERVOPACK servo amplifier series for conventional CNC machine tools. SR stands for universal servo unit with three configurable control modes including position, speed and torque via internal parameter adjustment. 07 represents rated matched motor power of 0.7kW with continuous rated output current at 7.6A RMS. A denotes standard universal main control PCB without customized hardware design. C means the drive accepts only ±10VDC analog speed or torque command input, and differential digital pulse positioning input is not available on this model. 1 indicates standard original factory firmware and universal default parameter group without OEM locked settings. E stands for encoder interface specially matched with Yaskawa USAREM series incremental encoder motors. R means rack type structural specification with exclusive mechanical outline for specified installation form and supporting corresponding R-type servo motors.
2. Electrical Specifications
Main circuit power input is three-phase AC200V~230V with allowable voltage fluctuation between minus 15 percent and plus 10 percent, compatible with 50Hz and 60Hz power grid. Independent single-phase AC200~230V terminals are reserved for separated control circuit power supply. Continuous rated output current is 7.6A; 300% peak overload current can be maintained for maximum 3 seconds and 150% overload can continuously run for 60 seconds. Nominal DC bus voltage ranges DC280V~320V, and P/N spare terminals are prepared for external regenerative braking resistor connection for heavy-load frequent deceleration conditions. This model only supports analog ±10VDC control instruction without pulse command channel.
3. Environmental and Mechanical Parameters
Operating ambient temperature ranges from 0℃ to +55℃, storage temperature covers -20℃~+70℃. Working relative humidity keeps 5%~80%RH without condensation. Protection grade is IP20 and the unit must be installed vertically inside closed electrical cabinet. Maximum applicable installation altitude is below 1000 meters above sea level, and the drive can resist vibration of 10~55Hz with 0.5mm single amplitude. This R version adopts rack-mounted mechanical structure different from ordinary panel-mounted models, with exclusive dimension and fixed installation requirement. Net weight is approximately 2.0kg.
4. Control Performance
The servo applies IGBT sine-wave PWM dual closed-loop control of speed loop and current loop. Speed adjustment ratio reaches 1:5000 with full-load steady-state speed accuracy within ±0.01%. CN2 feedback port is exclusively designed for USAREM incremental encoder connection without absolute encoder supporting circuit. Built-in digital notch filter suppresses mechanical resonance and running vibration. Automatic motor parameter identification function optimizes closed-loop gain automatically after wiring completion. Three control modes can be switched freely by modifying available internal parameters.
5. Interface and Communication Configuration
R/S/T terminals connect three-phase main AC power input; U/V/W terminals link three-phase power wiring of matched servo motor; P/N spare terminals are used for external regenerative brake resistor wiring. CN1 is opto-isolated digital I/O terminal block with 8 input channels and 6 relay output channels, containing servo enable, forward/reverse overtravel limit, emergency stop, servo ready output and fault alarm output functions following standard universal definition. CN2 is dedicated connector for USAREM incremental encoder feedback wiring. Onboard RS422 serial port with Yaskawa proprietary communication protocol is used for parameter reading, writing and real-time operating status monitoring.
6. Core Functions
Three control modes of position, speed and torque can be flexibly switched, and electronic gear ratio setting supports multi-axis synchronous linkage for automation equipment. Internal integrated dynamic braking circuit absorbs most regenerative energy during deceleration, and external braking resistor is only required under heavy-duty frequent emergency stop scenarios. Segmented low and high speed gain parameters ensure stable low-speed operation and fast high-speed dynamic response. The drive automatically stores latest 10 groups of historical fault codes for maintenance reference. All parameters follow standard factory setting without OEM customized lock.
7. Applicable Scenarios
This rack-mounted analog-control servo drive is mainly matched with 0.7kW USAREM-R series incremental servo motors, widely used on old-type CNC auxiliary feed axes and standardized rack installation automation production equipment. Replacement needs identical full part number CACR-SR07AC1ER.
8. Operation and Routine Maintenance Instructions
Before power-on, inspect all power cables, encoder wires and I/O signal wiring to eliminate short circuit, loose terminals and wrong connection risks. Complete motor parameter matching and gain debugging based on actual mechanical load. Keep cabinet ventilation unobstructed during operation, prohibit long-time continuous running when inner cabinet temperature exceeds 55℃ and avoid frequent repeated power on/off within short intervals. Conduct periodic maintenance every three to six months: tighten all terminal screws, inspect cable insulation aging and clean dust accumulated on drive heat sink. Cut off main AC power and wait no less than 15 minutes for full discharge of internal DC bus capacitor before any internal disassembly maintenance to prevent electric shock hazard. Cut off power and stop equipment immediately upon continuous fault alarm, then check servo motor, connecting cables and mechanical jamming before restarting operation.
9. Basic Troubleshooting
Overheat alarm is generally caused by blocked heat sink, excessive cabinet ambient temperature or long-term overload running. Encoder error alarm mostly results from loose CN2 connector or damaged incremental encoder feedback cable. Overvoltage fault occurs under frequent rapid deceleration with heavy load; install external regenerative braking resistor on P/N terminals to solve the problem.
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