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- Siemens
- 1FK7042-2AF71-1CH1
- Synchronous Motor
- Germany
- 48 mm
- 4.9 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 1FK7042-2AF71-1CH1 is a SIMOTICS S synchronous motor from the 1FK7 family, intended for controlled rotary motion in industrial automation and machine systems. It serves as the motor element in a servo axis, working with a compatible Siemens drive, feedback system, and motion controller to convert electrical control commands into mechanical rotation.
The motor can be applied to automated machinery where the axis must follow defined movement profiles rather than simply operate at a fixed speed. Typical equipment includes packaging machines, assembly systems, material-handling equipment, machine tools, production machinery, and other automated mechanisms requiring repeatable rotary movement.
For replacement and retrofit work, the motor should be evaluated together with the complete axis. The servo drive, feedback connection, mechanical coupling, driven load, and motion parameters all affect how the installed motor performs in the actual machine.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 1FK7042-2AF71-1CH1 |
| 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 motion-control applications
- Part of the Siemens 1FK7 motor family
- Suitable for controlled rotary movement in automated machinery
- Operates with a compatible Siemens servo drive and motion controller
- Supports closed-loop machine-axis operation with appropriate feedback
- Suitable for positioning, speed regulation, and coordinated axis movement
- Can be connected to couplings, gear mechanisms, belts, or other suitable transmissions
- Applicable to single-axis and multi-axis automation systems
- Suitable for repetitive production cycles and machine sequencing
- Appropriate for replacement and maintenance projects where the complete servo-axis configuration is compatible
Working Principle
The 1FK7042-2AF71-1CH1 operates as the motor stage of a controlled Siemens motion axis. The motion controller establishes the required movement based on the machine program, while the servo drive regulates the electrical power supplied to the motor.
The synchronous motor converts the controlled electrical input into rotary mechanical movement. The resulting rotation is transferred through the machine’s mechanical connection to the driven mechanism. Depending on the machine, this connection may include a direct coupling, gearbox, belt transmission, or another mechanical arrangement.
Motor feedback supplies actual operating information to the servo control system. The drive uses this information together with the commanded movement to regulate the motor and maintain the required axis behavior. This closed-loop arrangement allows the motor to participate in controlled positioning, speed regulation, and coordinated machine movement.
The main motion path can be represented as:
Motion Controller → Siemens Servo Drive → 1FK7042-2AF71-1CH1 → Mechanical Transmission → Machine Axis
Feedback information travels back through the motor feedback interface to support closed-loop control.
Role in a SIMOTICS S Servo Motion Control Architecture
The 1FK7042-2AF71-1CH1 occupies the motor layer within a Siemens SIMOTICS S motion-control architecture. It converts regulated electrical power from the servo drive into mechanical rotation while contributing feedback information to the closed-loop axis.
| Control Architecture Layer | Typical Component | Function |
|---|---|---|
| Motion Control | Siemens Motion Controller | Generates and coordinates machine-axis commands |
| Drive Layer | Siemens Servo Drive | Regulates motor power and servo operation |
| Motor Layer | 1FK7042-2AF71-1CH1 | Produces controlled rotary mechanical movement |
| Feedback Layer | Motor Feedback System | Reports actual motor behavior to the control loop |
| Mechanical Layer | Coupling / Gear / Belt | Transfers motor rotation to the machine |
| Machine Axis | Automated Mechanism | Performs the required production movement |
| Supervisory Layer | HMI / Engineering System | Provides operation, configuration, and diagnostics |
Industrial Applications
| Application | Typical Use |
|---|---|
| Packaging Machinery | Controlled rotary movement for indexing and production sequences |
| Automated Assembly | Precise movement of assembly mechanisms and machine axes |
| Material Handling | Servo-controlled positioning and coordinated movement |
| Machine Tools | Controlled rotary motion within automated machine mechanisms |
| Production Machinery | Repeatable movement during manufacturing cycles |
| Robotics and Automation | Rotary servo-axis movement within integrated equipment |
| Printing Equipment | Synchronized movement of production mechanisms |
| Converting Machinery | Controlled movement during material-processing operations |
Installation and Maintenance
- Verify drive compatibility — Confirm that the 1FK7042-2AF71-1CH1 is suitable for the connected Siemens drive and intended motion-axis configuration.
- Check mechanical mounting — Verify that the motor mounting interface and machine structure are appropriate before installation.
- Inspect the motor — Check the housing, shaft, connectors, and accessible surfaces for damage before mounting the motor.
- Verify feedback compatibility — Confirm that the motor feedback arrangement and associated cable match the connected drive system.
- Inspect power connections — Check the motor power cable, connectors, routing, and insulation condition before energizing the axis.
- Protect feedback wiring — Route feedback wiring appropriately and keep it away from potential sources of electrical interference where required by the machine installation.
- Check the mechanical load — Verify that the connected machine mechanism can move freely and does not impose unexpected resistance on the motor.
- Confirm drive parameters — Check motor identification, feedback settings, direction, scaling, and applicable servo-axis parameters.
- Inspect shaft and coupling alignment — Ensure correct alignment between the motor shaft and mechanical transmission and avoid unnecessary mechanical loading.
- Perform a controlled movement test — Start with a low-risk movement to verify rotation direction, feedback response, and basic servo operation.
- Monitor operating behavior — Watch for abnormal vibration, noise, temperature increase, positioning deviations, or servo alarms during commissioning.
- Document the installation — Record the motor model, drive configuration, feedback arrangement, wiring changes, and commissioning results for future maintenance.
Related Components
| Component | Function |
|---|---|
| Siemens SINAMICS Servo Drive | Regulates electrical power and servo operation |
| Siemens Motion Controller | Generates and coordinates machine-axis movement |
| Motor Power Cable | Provides the motor power connection |
| Motor Feedback Cable | Transfers feedback information between motor and drive |
| Mechanical Coupling | Connects the motor shaft to the machine mechanism |
| Gearbox | Adapts motor rotation to the machine requirements |
| HMI / Engineering System | Supports operator control and drive configuration |
| Industrial Control Network | Connects motion-control and automation equipment |
Recommended Related Models
| Model | Product Type | Series |
|---|---|---|
| Siemens 1FK7022 Series | Synchronous Servo Motor | SIMOTICS S |
| Siemens 1FK7032 Series | Synchronous Servo Motor | SIMOTICS S |
| Siemens 1FK7042 Series | Synchronous Servo Motor | SIMOTICS S |
| Siemens 1FK7045 Series | Synchronous Servo Motor | SIMOTICS S |
| Siemens 1FK7063 Series | Synchronous Servo Motor | SIMOTICS S |
Key Advantages
- SIMOTICS S platform for industrial motion applications
- 1FK7 series synchronous motor architecture
- Suitable for controlled rotary machine-axis movement
- Supports closed-loop servo operation with compatible drive and feedback hardware
- Applicable to positioning, speed control, and coordinated motion
- Integrates into Siemens motion-control architectures
- Suitable for automated production and machine-axis maintenance applications
Technical FAQs
What is the Siemens 1FK7042-2AF71-1CH1 used for?
The 1FK7042-2AF71-1CH1 is a SIMOTICS S synchronous motor used as part of a controlled industrial motion axis. It is suitable for machinery requiring regulated rotary movement and coordinated axis operation.
What components are required for operation with this motor?
The motor is normally used as part of a complete motion system that includes a compatible Siemens servo drive, motion controller, feedback connection, motor cabling, and mechanical machine interface.
What should be checked before replacing a 1FK7042 motor?
The replacement should be checked against the existing servo drive, feedback arrangement, mechanical mounting, shaft connection, machine load, and configured motion parameters. A matching series designation alone does not establish complete compatibility.
Why should the mechanical system be checked after motor replacement?
The motor operates together with the machine’s mechanical transmission and load. Incorrect coupling alignment, excessive resistance, mechanical backlash, or other transmission problems can affect axis movement even when the electrical motor and drive connections are correct.