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- Siemens
- 1FK7042-2AF71-1RH0
- Synchronous Motor
- Germany
- 48 mm
- 4.9 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 1FK7042-2AF71-1RH0 is a SIMOTICS S synchronous motor used in servo-controlled machine axes where rotary movement needs to follow a defined motion profile. It belongs to the 1FK7 motor family and is intended to operate as part of a complete Siemens motion-control system rather than as an independently controlled motor.
In practical machine applications, this type of motor can drive mechanisms such as indexing units, feed axes, rotary positioning systems, automated tooling, and production equipment that repeatedly moves between defined positions. It can also be used in multi-axis machinery where several motors must operate in coordination.
The motor works with a compatible Siemens servo drive and motion controller. The controller determines the required axis movement, the drive regulates the electrical power delivered to the motor, and the motor feedback system reports actual motor behavior back into the control loop. This arrangement allows the machine to respond to changing movement commands during production cycles.
For maintenance or replacement, the motor should be evaluated as one part of the complete servo axis. The drive configuration, feedback connection, mechanical transmission, controller settings, and machine load all need to be considered before commissioning.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 1FK7042-2AF71-1RH0 |
| Product Type | Synchronous Motor |
| Product Family | SIMOTICS S |
| Series | 1FK7 |
| Motor Technology | Permanent-Magnet Synchronous Motor |
| Motion Type | Servo Motion |
| Control Method | Closed-Loop Motion Control |
| Application | Industrial Machine-Axis Motion |
| System Integration | Siemens Servo Drive and Motion Controller |
| Feedback | Motor Feedback System |
| Mechanical Function | Rotary Machine-Axis Drive |
| Installation | Machine-Mounted |
| Shaft Height | 48 mm |
| Weight | 4.9 kg |
Product Features
- SIMOTICS S synchronous motor for industrial servo-axis applications
- 1FK7 family motor architecture for controlled rotary movement
- Suitable for positioning, indexing, feeding, and coordinated machine motion
- Operates within a closed-loop servo control system
- Works with a compatible Siemens servo drive and motion controller
- Motor feedback supports monitoring of actual axis movement
- Suitable for repetitive machine cycles requiring controlled movement
- Can be connected to suitable mechanical transmission components
- Applicable to individual servo axes and coordinated multi-axis equipment
- Suitable for automation systems requiring repeatable rotary machine movement
Working Principle
The 1FK7042-2AF71-1RH0 operates as the motor stage of a servo-controlled axis. A motion controller generates the required movement command based on the machine sequence, while the servo drive converts that command into controlled electrical output for the motor.
The motor produces rotary movement from the controlled electrical input. Its shaft then transfers this movement directly or through a coupling, gearbox, belt, or other mechanical transmission to the machine mechanism.
During operation, the motor feedback system supplies actual movement information to the servo control loop. The drive uses this information to regulate the motor response and keep the axis aligned with the commanded movement.
A typical signal and power path is:
Motion Controller → Siemens Servo Drive → 1FK7042-2AF71-1RH0 → Mechanical Transmission → Machine Axis
The final axis performance depends on the complete system. Incorrect feedback configuration, mechanical misalignment, excessive load, or unsuitable drive parameters can affect movement even when the motor itself is operating normally.
Role in a Servo Motion Control Architecture
The 1FK7042-2AF71-1RH0 forms the motor layer of a Siemens servo axis. It converts controlled electrical power from the servo drive into mechanical rotation while its feedback system contributes actual motor information to the closed-loop control process.
| Control Architecture Layer | Function | Relationship to 1FK7042-2AF71-1RH0 |
|---|---|---|
| Motion Controller | Creates and coordinates machine movement commands | Defines the required axis behavior |
| Servo Drive | Regulates motor power and servo control | Controls the motor |
| Motor Layer | Produces controlled rotary movement | 1FK7042-2AF71-1RH0 |
| Feedback Layer | Reports actual motor behavior | Supports closed-loop regulation |
| Mechanical Transmission | Transfers motor movement | Connects the motor to the machine mechanism |
| Machine Axis | Performs the required mechanical operation | Receives the motor output |
| Supervisory System | Provides machine operation and status functions | Coordinates the broader automation process |
Industrial Applications
| Application | Typical Use |
|---|---|
| Packaging Machinery | Drives indexing, feeding, and positioning mechanisms |
| Automated Assembly | Controls tooling and repeatable assembly-axis movement |
| Machine Tools | Supports controlled movement of selected machine axes |
| Material Handling | Drives transfer and positioning mechanisms |
| Production Machinery | Supports programmed movement sequences during automated production |
| Printing Equipment | Controls selected feed and synchronization mechanisms |
| Converting Machinery | Drives controlled material-processing and positioning functions |
| Robotics and Automation | Provides rotary movement within automated machine mechanisms |
Installation and Maintenance
- Verify servo drive compatibility — Confirm that the connected Siemens servo drive supports the selected motor and intended machine-axis application.
- Check mechanical mounting — Ensure the motor mounting arrangement is secure and properly aligned with the machine structure.
- Inspect the motor before installation — Examine the housing, shaft, connectors, and accessible surfaces for physical damage or contamination.
- Verify feedback compatibility — Check that the motor feedback connection and drive configuration correspond to the installed motor.
- Inspect motor power cabling — Confirm that power cables and connectors are correctly installed and free from visible damage.
- Route feedback wiring correctly — Keep feedback connections properly routed and separated from potential electrical interference where required by the machine installation.
- Check the driven mechanism — Make sure the connected machine mechanism moves freely without binding, obstruction, or unexpected resistance.
- Verify servo parameters — Check motor selection, feedback settings, direction, scaling, and other applicable axis parameters before enabling motion.
- Inspect shaft coupling — Confirm that the coupling or transmission component is correctly aligned and does not place excessive mechanical stress on the motor.
- Perform a controlled test movement — Start with a limited movement to verify direction, basic response, and communication between the controller, drive, and motor.
- Monitor operating behavior — Check for unusual vibration, noise, temperature increase, positioning deviations, or servo faults during commissioning.
- Record maintenance information — Document the installed motor model, drive configuration, feedback arrangement, and relevant axis settings for future service work.
Related Components
| Component | Function |
|---|---|
| Siemens SINAMICS Servo Drive | Controls motor power and closed-loop servo operation |
| Siemens Motion Controller | Generates and coordinates machine-axis commands |
| Motor Power Cable | Carries controlled electrical power between drive and motor |
| Motor Feedback Cable | Transfers feedback information from the motor |
| Mechanical Coupling | Connects the motor shaft to the driven mechanism |
| Gearbox | Adapts motor rotation to the mechanical requirements of the machine |
| HMI / Engineering System | Supports machine operation, diagnostics, and configuration |
| Industrial Control Network | Connects motion-control and automation equipment |
Recommended Related Models
| Model | Product Type | Series | Typical Relationship |
|---|---|---|---|
| Siemens 1FK7042-2AF71-1CG0 | Synchronous Motor | 1FK7 | Related 1FK7042 motor variant |
| Siemens 1FK7042-2AF71-1CH1 | Synchronous Motor | 1FK7 | Related configuration within the same motor family |
| Siemens 1FK7042-2AF71-1CH2 | Synchronous Motor | 1FK7 | Related 1FK7042 variant for servo-axis applications |
| Siemens 1FK7042-2AF71-1RA0 | Synchronous Motor | 1FK7 | Closely related motor configuration |
| Siemens 1FK7042-2AF71-1RG0 | Synchronous Motor | 1FK7 | Related 1FK7042 motor variant |
Key Advantages
- SIMOTICS S platform for industrial servo applications
- 1FK7 architecture for controlled rotary machine movement
- Closed-loop operation with motor feedback
- Suitable for positioning and coordinated axis motion
- Integrates with Siemens servo drive and motion-control systems
- Applicable to automated production and machine-axis applications
- Suitable for maintenance and replacement within compatible 1FK7 systems
Technical FAQs
What is the role of the 1FK7042-2AF71-1RH0 in a machine?
It serves as the rotary motor within a servo-controlled machine axis. The motor converts controlled electrical output from the servo drive into mechanical rotation for the connected machine mechanism.
Can this motor operate without a servo drive?
The motor is intended to function as part of a compatible servo system. The servo drive supplies controlled motor power and manages the closed-loop operation, so the motor should be evaluated together with its associated drive and control architecture.
Why should the mechanical load be checked before commissioning?
A servo motor may respond correctly electrically while the machine mechanism still has excessive resistance, binding, or alignment problems. These mechanical conditions can affect positioning, increase motor loading, and generate servo faults.
What should be verified after replacing this motor?
Check the motor and feedback connections, servo parameters, rotation direction, mechanical coupling, and basic axis movement. After the initial test, verify the required positioning or coordinated movement while monitoring the axis for abnormal behavior.