DRIVE AC SERVO
For your information
- We offer for this displayed device sale, exchange and repair services.
- Prices for Servo-/Spindle Drives Power Supplies are standard prices for standard repair
- Devices for sell or exchange, was preventively overhauled in our workshop.
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Detailed information about Yaskawa CACR Servopacks
We offer serial repairs for this product series
- Repair of many electronic assemblies according to standardized repair procedures with documentation.
- A larger repair capacity is possible for the same or similar orders
- Target group: machine manufacturers, service companies and distributors
Access to years of experience, specialists and equipment.
Find out more about our series repairs
Overview
The Yaskawa CACR-SR07BB1BM is a reliable AC servo amplifier of the proven SR series. These amplifiers have been used for decades in machine tools, automation systems, and handling systems, characterized by robust power sections, analog control technology, and very clear fault diagnostics via a 7-segment display. The SR07 model belongs to the 750 W power class and is particularly suitable for dynamic feed and auxiliary axes.
Overview
- Device category: AC Servo Amplifier (Speed Control Type)
- Series/Class: CACR-SR, 200 V class, 0.75 kW class
- Design: solid industrial housing, service-friendly architecture
Model Designation
- CACR = Yaskawa AC Servo Drive / Servopack
- SR = SR Series (Predecessor of the Sigma Series)
- 07 = Power class approx. 0.75 kW (750 W motor)
- B = Function/design variant of the series
- B = additional sub-variant (specification within the SR family)
- 1 = Power supply 200–230 V AC (single/three-phase)
- BM = Special or OEM configuration, machine-specific functions or parameters may be set ex works
Technical Data
| Feature | Value |
|---|
| Rated power | approx. 750 W |
| Supply | AC 200–230 V, 50/60 Hz |
| Input current | approx. 4–5 A (depending on load and application) |
| Output | 3-phase PWM output (U/V/W) |
| Control type | Analog speed control (±10 V) |
| Feedback | Incremental encoder or tacho feedback (motor dependent) |
| Protection functions | Overcurrent, overload, overvoltage, undervoltage, overheating |
| Braking/Regeneration | External regenerative resistor via B1/B2 |
| Cooling | Natural convection / cabinet ventilation required |
| Weight/Dimensions | n. a. |
Connections & Interfaces
- R/S/T: Mains input 200–230 V AC
- U/V/W: Motor output
- B1/B2 (RB): Connection for external braking/regenerative resistor
- PE: Protective earth connection
- Control terminals (CN1):
- ±10 V speed reference
- Servo-ON / Enable
- Alarm/Ready signals
- Monitor outputs for torque / speed
- Encoder/Tacho feedback: Feedback connection from the motor
- 7-segment display: Fault diagnostics with codes 1–8
Control Board / Assemblies
- Control board: Controller, analog processing, protection logic
- Power output stage: DC link, transistor output stage, rectifier
- Regeneration module: Brake chopper and resistor monitoring
- Power supply section: internal auxiliary voltages
- Thermal section: Heat sink monitoring
Alarms & Troubleshooting
| Code | Designation | Typical Finding | Check | Remedy |
|---|
| 1 | Over-current | Short circuit motor/output stage, defective transistors | Check U/V/W, insulation measurement | Repair power section, check motor |
| 2 | Circuit protector tripped | MCCB/fuse triggered | Check mains input | Fix short circuit, switch on correctly |
| 3 | Regenerative trouble | Brake resistor defective/missing, chopper disturbed | Check RB terminals, measure resistance | Connect/replace resistor, repair chopper |
| 4 | Over-voltage | DC link too high | Measure mains voltage | Stabilize mains, optimize braking ramps |
| 5 | Overspeed | Setpoint too high, encoder error | Check ±10 V reference, check encoder cable | Limit setpoint, repair encoder |
| 6 | Voltage drop | Undervoltage in the mains | Check voltage under load | Improve supply, check wiring paths |
| 7 | Overload | Continuous overload | Check axis mechanics, load profile | Reduce load, overhaul mechanics |
| 8 | Heat sink overheat | Heat sink too hot | Check cabinet ventilation, dust, airflow | Cleaning, improve ventilation |
Typical Applications
- Machine tools (Milling, turning – feed delivery 0.75 kW class)
- Packaging and handling machines
- Assembly and feeding systems
- Retrofit projects with existing SR servo technology
Service Notes
- Regularly clean the heat sink and ensure proper airflow
- Check the brake resistor for correct value and condition
- Perform motor insulation test only when the amplifier is disconnected
- Regularly check and tighten connectors
- Back up parameters – especially for OEM versions (BM)
Repair Description
- Initial inspection: Visual check, measurement of motor and mains cables, checking the condition of the feedback.
- Disassembly & Cleaning: Dismantling the device, cleaning the boards and the heat sink.
- Analysis: Checking the output stage, rectifier, capacitors, brake chopper, and control board.
- Repair: Replacement of defective transistor stages, rectifiers, capacitors; Reworking critical solder joints.
- Testing & Load Test: Test on the test bench motor, observation of temperatures, current behavior, and alarm triggering.
- Long-term Test & Conclusion: Controlled continuous operation under load; Documentation of all measured values and creation of a test report.
We Verify Your Drives and Electronic Components for Authenticity
Authenticity Check for Drives & Electronic Components: Confidence Before You Invest
Prevent failures caused by hidden counterfeits.
With our professional authenticity verification, you ensure
that your drives and system components truly meet original manufacturer quality before being installed in critical processes.
Why Authenticity Check Is Essential Today
The market for industrial drives, motors, and control components is globally interconnected. Components are traded through various channels, new, used, refurbished, or from warehouse stock.
As shown in our article Solutions Against Counterfeit Drive Components, products with unclear origin or altered substance repeatedly enter industrial supply chains.
For buyers, it is often not clearly recognizable:
- Whether it is an original product from the manufacturer
- Whether the device has been opened or technically modified
- Whether serial numbers and nameplates are authentic
- Whether all components correspond to the original condition
Especially in production-critical systems, unverified components can lead to downtime or consequential damage.
Professional authenticity verification provides clarity before the component is installed or resold.
What Exactly Is Checked During Authenticity Check?
Inspection of Nameplate and Serial Number
We compare serial numbers, production markings, and device designations with our technical reference data and manufacturer standards, checking them for plausibility and irregularities.
Visual and Mechanical Inspection
Our technicians professionally open the device and examine housing, screws, seals, connectors, and internal assemblies for signs of manipulation, replacement traces, or deviations from the original condition.
Electrical Measurements and Functional Testing
We test power and control units on our test benches under realistic conditions and verify whether the technical parameters comply with manufacturer specifications.
Software and Parameter Analysis
By reading firmware versions, parameters, and internal device data, we identify modifications, non-original configurations, or inconsistent software versions.
Comprehensive Technical Evaluation
Based on all inspections, we prepare a well-founded overall assessment, transparently document the device condition, and provide you with a clear recommendation for further use, repair, or replacement.
Who Our Authenticity Check Is the Right Choice For
Maintenance Personnel and Technicians
Safety before installation: verification of drives and motors to prevent unplanned downtime.
Purchasing and Procurement
Protection against incorrect purchases through technical inspection of serial numbers, condition, and authenticity.
Quality Management
Documented test results for internal quality assurance and audit purposes.
Machine and Plant Manufacturers
Reliable verification of components to safeguard customer projects and contractual commitments.
Distributors and Resellers
Transparent evaluation of device condition to enable trustworthy resale.
Learn More About Manipulation and Counterfeit Electronic Components in Our Blogs
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