1FK7042-2AF71-1RG0 1FK7 Compact Servo Motor 3Nm AM20DQI

The 1FK7042-2AF71-1RG0 is a 1FK7 Compact permanent-magnet synchronous servo motor designed for positioning, speed-control and cyclic machine axes.

It provides a static torque of 3 Nm, a rated speed of 3000 rpm and an output rating of approximately 0.82 kW.

The main distinguishing feature of the RG0 configuration is its AM20DQI multiturn absolute encoder. This feedback system combines 20-bit angular resolution within each motor revolution with a 12-bit multiturn measurement range.

The encoder communicates with the compatible drive system through DRIVE-CLiQ, supporting motor identification, rotor-position feedback, speed regulation and absolute axis-position measurement.

The motor is supplied with a plain shaft, IP64 protection and no integrated holding brake. This configuration is particularly suitable for horizontal axes, precision clamping couplings and machines that already use an external holding mechanism.

Unlike the CG0 version, which uses the higher-resolution AM24DQI encoder, this RG0 model uses AM20DQI feedback. This encoder distinction should be the primary focus of the page.

Key Features

• 3 Nm static torque
• 3000 rpm rated speed
• 0.82 kW rated output
• AM20DQI multiturn absolute encoder
• 20-bit position resolution
• 12-bit multiturn measurement
• DRIVE-CLiQ communication
• Plain shaft
• No integrated holding brake
• IP64 protection

Typical Applications

• Packaging machine feeders
• Conveyor positioning
• Printing registration
• Small rotary indexing
• Assembly-machine axes

3 Nm Compact Servo Motor

The 1FK7042-2AF71-1RG0 belongs to the compact 3 Nm torque class.

Typical machine functions include:

• Product feeding
• Label positioning
• Conveyor adjustment
• Small rotary tables
• Printing registration
• Pick-and-place movement
• Gearbox-driven positioning

The motor must be selected according to the full torque-speed curve, load inertia and operating cycle.

3000 rpm Rated-Speed Configuration

The AF71 winding configuration provides a rated speed of 3000 rpm.

This speed class offers a balance between:

• Continuous torque
• Dynamic acceleration
• Machine-cycle speed
• Gearbox input speed
• Thermal performance
• Positioning response

It should be distinguished from lower-speed and higher-speed winding versions within the 1FK7042 family.

AM20DQI Multiturn Encoder

The RG0 motor configuration uses an AM20DQI absolute encoder.

Encoder Resolution per Revolution

20 Bit

Multiturn Measurement Range

12 Bit

Communication

DRIVE-CLiQ

The encoder provides both the absolute shaft angle and the number of completed revolutions within its multiturn range.

20-Bit Position Resolution

A 20-bit resolution provides 1,048,576 distinguishable encoder positions within one mechanical revolution.

This supports:

• Rotor-angle feedback
• Motor commutation
• Closed-loop speed control
• Position regulation
• Low-speed stability
• Repeatable axis movement

The final machine accuracy also depends on the coupling, gearbox, mechanical backlash, drive tuning and control project.

12-Bit Multiturn Measurement

The 12-bit multiturn function provides a measurement range of up to 4096 motor revolutions.

This allows the drive system to retain absolute position information across multiple shaft rotations within the encoder range.

Typical advantages include:

• Reduced homing requirements
• Absolute position after power restoration
• Revolution counting
• Position tracking through gearboxes
• Easier machine restart

The actual machine-axis range depends on the configured gear ratio and mechanical transmission.

AM20DQI vs AM24DQI

AM20DQI

20-bit angular resolution

12-bit multiturn range

Used in the 1RG0 configuration

AM24DQI

24-bit angular resolution

12-bit multiturn range

Used in the 1CG0 and 1CG1 configurations

Both are multiturn absolute encoders, but the AM24DQI provides higher angular resolution within each motor revolution.

DRIVE-CLiQ Integration

The encoder communicates with a compatible servo-drive system through DRIVE-CLiQ.

Typical functions include:

• Automatic motor identification
• Electronic motor-data transfer
• Encoder-position communication
• Speed-feedback transmission
• Temperature-data communication
• Drive commissioning support
• Fault diagnostics

A compatible Motor Module, Control Unit and approved motor cable are required.

Plain Shaft Configuration

The motor is supplied with a plain shaft rather than a feather-key shaft.

A plain shaft is commonly used with:

• Clamping couplings
• Bellows couplings
• Shrink-disc couplings
• Precision gearbox inputs
• Direct-coupled mechanisms

Correct clamping torque and shaft alignment are required to prevent slipping or vibration.

No Integrated Holding Brake

The 1FK7042-2AF71-1RG0 does not include an integrated holding brake.

It is most suitable for:

• Horizontal axes
• Mechanically self-locking systems
• Applications with an external brake
• Axes that do not require shaft holding after shutdown

Vertical or gravity-loaded applications require an appropriate external holding and safety arrangement.

IP64 Protection

The motor is specified with an IP64 degree of protection.

IP64 provides protection against:

• Dust ingress
• Splashing water from different directions

It does not mean the motor is suitable for direct water jets, immersion or aggressive washdown.

The complete protection level depends on properly installed connectors, cables and shaft seals.

Natural Cooling

The motor dissipates heat through its housing and mounting flange without a separate cooling fan.

Reliable operation requires:

• Firm flange installation
• Adequate heat transfer
• Unobstructed surrounding airflow
• Approved ambient temperature
• Correct drive parameters
• Operation within rated limits

Motor and Drive Integration

A complete operating axis normally includes:

• Compatible Control Unit
• Motor Module
• Line or power-supply module
• Motor power cable
• DRIVE-CLiQ feedback connection
• 1FK7042-2AF71-1RG0 motor
• Mechanical coupling or gearbox
• Approved motor parameters

The 600 V DC value refers to the compatible drive-system DC link. The motor must not be connected directly to a 600 V DC power supply.

Replacement Identification

Correct Model Number

1FK7042-2AF71-1RG0

Motor Family

1FK7 Compact

Static Torque

3 Nm

Rated Speed

3000 rpm

Encoder

AM20DQI Multiturn Absolute

Encoder Resolution

20 Bit + 12 Bit

Shaft

Plain Shaft

Holding Brake

Not Included

Protection

IP64

Before replacement, confirm:

• Complete order number
• RG0 suffix
• AM20DQI encoder requirement
• Shaft design
• Brake requirement
• IP64 protection
• Connector orientation
• Mounting dimensions
• Motor cable
• Drive firmware
• Mechanical coupling

Do not select a replacement using only the 1FK7042 motor family.

Installation Guidelines

Disconnect and secure the drive-system power.

Wait for the DC link to discharge fully.

Verify the absence of hazardous voltage.

Support the motor during removal.

Record all power and encoder connections.

Confirm the complete order number.

Inspect the flange and shaft.

Check the clamping coupling.

Install the motor without striking the shaft.

Align the driven load correctly.

Connect the motor power cable.

Connect the DRIVE-CLiQ feedback cable.

Restore the approved motor parameters.

Test the motor at reduced speed.

Check encoder direction and absolute position.

Monitor vibration, current and temperature.

Validate all machine safety functions before production use.

Installation should be completed by qualified servo-drive personnel.

FAQ

Q1: What is 1FK7042-2AF71-1RG0?

A1: It is a 1FK7 Compact synchronous servo motor with 3 Nm static torque, 0.82 kW output and a 3000 rpm rated speed.

Q2: Which encoder does it use?

A2: It uses an AM20DQI 20-bit plus 12-bit multiturn absolute encoder.

Q3: Is the encoder single-turn or multiturn?

A3: It is a multiturn absolute encoder. The 20-bit value describes position within one revolution, while the 12-bit value describes the multiturn range.

Q4: How many revolutions can the encoder measure?

A4: A 12-bit multiturn range represents up to 4096 motor revolutions.

Q5: Does the motor include a holding brake?

A5: No. This configuration is supplied without an integrated holding brake.

Q6: What shaft type does it have?

A6: It has a plain shaft with tolerance N.

Q7: What is the protection rating?

A7: The motor is specified with IP64 protection.

Q8: What is the difference between RG0 and CG0?

A8: The RG0 uses a 20-bit AM20DQI multiturn encoder, while the CG0 uses a higher-resolution 24-bit AM24DQI multiturn encoder.

Q9: Can it connect directly to a 600 V DC source?

A9: No. It requires a compatible servo-drive system. The 600 V DC value refers to the drive-system DC link.

Q10: What distinguishes this model from other 1FK7042 motors?

A10: Its defining combination is AM20DQI multiturn feedback, 3000 rpm speed, plain shaft, no holding brake and IP64 protection.