Fanuc A06B-0115-B804 βis Series AC Servo Motor
Brushless AC servo motor from Fanuc's βis series, designed for entry-level CNC machines and cost-effective automation builds where Fanuc-grade quality and ecosystem integration are required without the full αi-class performance overhead.
Product Overview
The Fanuc A06B-0115-B804 is a purpose-built, cost-optimized servo motor targeting smaller machines, lighter axes, and applications requiring reliable, repeatable motion at competitive system costs. The B804 suffix defines the specific encoder specification and connector configuration, making exact part number matching essential for compatibility.
Key Specifications
| Parameter |
Value |
| Model Number |
A06B-0115-B804 |
| Motor Type |
Brushless AC Servo |
| Series |
Fanuc βis |
| Feedback System |
Serial Encoder |
| Drive Compatibility |
Fanuc βi Series Servo Amplifier |
| Cooling Method |
Self-Cooled (Natural Convection) |
| Mount Type |
Flange Mount |
| Application Focus |
Entry-Level CNC / Light Industrial Automation |
Technical Characteristics
Serial Encoder Technology
Digital serial transmission reduces sensitivity to electrical noise in machine tool environments, providing clean, reliable feedback in electrically noisy cabinets.
Amplifier Auto-Identification
Compatible βi series servo amplifiers automatically read motor identity data and load corresponding parameters on powerup, simplifying setup and reducing configuration errors.
Self-Cooled Operation
Natural convection cooling eliminates external fans or liquid cooling circuits, simplifying installation while requiring consideration of thermal envelope limitations for sustained high-load operations.
Flange Mount Construction
Standard servo motor flange interface ensures predictable mechanical installation with shaft coupling or gearhead connections.
Common Applications
- Two-axis and three-axis CNC lathe feed and cross-slide drives
- Small vertical machining center X, Y, and Z axis drives
- CNC turret punch axis positioning
- Wire EDM axis control on smaller machines
- Semi-automated assembly station linear axis drives
- Conveyor and transfer system positioning axes
- Small-format plasma and waterjet cutting axis drives
- Educational and training CNC machine axis control
Compatibility & Integration
Designed to pair with Fanuc βi series servo amplifier modules in CNC cabinets running Series 0i-D, 0i-F, and related βi system controller configurations. The serial encoder interface handles motor identification, position feedback, and fault reporting through a single cable.
Replacement & Procurement Guidelines
Exact Part Number Matching
The B804 suffix is mandatory - adjacent codes (B800, B802, etc.) have incompatible connector geometries or encoder protocols.
Parameter Backup Procedure
Always backup the CNC controller's full parameter set before motor removal. Axis-specific tuning data resides in the controller and must be restored from backup.
Replacement Unit Considerations
New units available through authorized distribution; remanufactured units should include bearing replacement, encoder validation, and performance testing documentation.
Frequently Asked Questions
What servo amplifier is the A06B-0115-B804 designed to work with?
Designed for Fanuc βi series servo amplifier modules in CNC cabinets running Series 0i-D, 0i-F, and related βi system controller configurations. Confirm specific amplifier module type and power rating before installation.
How does the βis series differ from Fanuc's αis series?
βis series is Fanuc's cost-optimized tier for lighter-duty applications with more modest performance requirements. αis series targets higher-performance applications with greater dynamic response and torque density. They pair with different amplifier families and are not interchangeable.
Is the B804 suffix interchangeable with other B8xx suffix variants?
No. The suffix defines encoder specification and connector configuration. Different B8xx codes have incompatible connector geometries or encoder protocols. Always use the exact full part number from the original motor's nameplate.
Does the replacement motor need manual configuration in the CNC controller?
βi series amplifiers auto-load standard motor parameters from encoder ID. Axis-specific parameters (travel limits, torque clamp values, acceleration settings) stored in the CNC controller must be restored from parameter backup after motor replacement.
What should be verified when purchasing a remanufactured A06B-0115-B804?
Confirm bearing replacement, serial encoder inspection and validation, and functional performance testing against Fanuc specifications. Request written documentation covering rebuild scope and test results, especially for production-critical applications.
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