1FK7042-2AF71-1CG1 1FK7 Compact Servo Motor 3Nm Multiturn Encoder

The 1FK7042-2AF71-1CG1 is a compact permanent-magnet synchronous servo motor designed for positioning, feeding and speed-controlled 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 defining feature of this CG1 configuration is its 24-bit plus 12-bit multiturn absolute encoder with DRIVE-CLiQ communication.

The multiturn feedback system supplies both the angular position within one motor revolution and the number of completed revolutions within its measurement range. This makes the motor suitable for applications that need absolute axis-position information after power restoration.

The motor is supplied with a plain shaft and does not include an integrated holding brake. It is therefore particularly suitable for horizontal axes, direct coupling arrangements and mechanisms that already include an external holding device.

Its naturally cooled compact construction avoids the need for a separately powered cooling fan under normal rated operating conditions.

Key Features

• 3 Nm static torque
• 3000 rpm rated speed
• 0.82 kW rated output
• 24-bit + 12-bit multiturn absolute encoder
• AM24DQI feedback system
• DRIVE-CLiQ communication
• Plain shaft with tolerance N
• No integrated holding brake
• Natural cooling
• IP65 motor protection

Typical Applications

• Packaging machine feeders
• Conveyor positioning
• Printing equipment
• Rotary indexing axes
• Pick-and-place mechanisms

3 Nm Compact Torque Class

The 1FK7042-2AF71-1CG1 belongs to the 3 Nm static-torque class.

This output level is suitable for smaller machine axes such as:

• Product feeding mechanisms
• Label positioning systems
• Small rotary tables
• Conveyor adjustment axes
• Printing registration units
• Light handling mechanisms

The motor must be selected according to the complete torque-speed curve, acceleration demand and reflected load inertia.

3000 rpm Winding Configuration

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

This speed class offers a practical balance between:

• Continuous torque
• Axis acceleration
• Machine-cycle speed
• Gearbox input speed
• Motor thermal loading

It should be distinguished from 2000 rpm and 4500 rpm versions in the same motor frame.

Multiturn Absolute Encoder

The motor uses a 24-bit plus 12-bit multiturn absolute encoder.

The encoder provides:

• Absolute rotor angle within one revolution
• Multiturn revolution counting
• Motor commutation feedback
• Closed-loop speed information
• Axis-position feedback
• Direction-of-rotation detection

The 24-bit component provides high angular resolution within one revolution, while the additional multiturn information records completed revolutions within the encoder range.

Multiturn vs Single-Turn Encoder

Multiturn Encoder

Provides angular position and revolution count.

Useful when the machine needs absolute position after power restoration.

Single-Turn Encoder

Provides absolute angular position only within one revolution.

The machine may need additional homing to determine the total axis position.

This distinction is the main difference between the CG1 configuration and otherwise similar single-turn versions.

DRIVE-CLiQ Feedback

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

Typical functions include:

• Automatic motor identification
• Electronic motor-data transfer
• Encoder feedback transmission
• Temperature-data communication
• Drive commissioning support
• Fault diagnostics
• System topology detection

The motor requires a compatible Motor Module, Control Unit and suitable power and feedback cabling.

Plain Shaft Configuration

The 1FK7042-2AF71-1CG1 is supplied with a plain shaft.

A plain shaft is commonly used with:

• Clamping couplings
• Shrink-disc couplings
• Precision bellows couplings
• Direct-drive mechanical connections
• Low-backlash gearbox inputs

Compared with a keyed shaft, a plain shaft can support more uniform coupling contact and reduced imbalance when correctly installed.

No Integrated Holding Brake

This configuration does not include an integrated holding brake.

It is suitable for:

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

Vertical or gravity-loaded axes require a separate validated holding arrangement.

Holding Brake vs No-Brake Version

No-Brake Version

Simpler motor construction

No brake power wiring

Suitable where mechanical holding is unnecessary

Brake Version

Provides a static holding function after the axis stops

Requires brake control and power supply

Often selected for vertical or suspended loads

A motor holding brake is not intended as a continuous dynamic stopping brake unless specifically approved.

Natural Cooling

The motor dissipates heat through its housing and mounting flange.

Reliable operation requires:

• Firm flange mounting
• Adequate heat transfer
• Unobstructed surrounding airflow
• Approved ambient temperature
• Correct drive parameterization
• Operation within the permitted torque-speed range

The motor should not be described as externally fan-cooled.

IP65 Protection

The motor is specified with IP65 protection for the applicable motor configuration.

This means the housing provides protection against dust ingress and water jets under the defined test conditions.

IP65 does not automatically make the motor suitable for:

• Continuous water immersion
• Aggressive chemical washdown
• Outdoor exposure without additional protection
• Incorrectly sealed cable connections

Final protection depends on correct connectors, cables and installation.

Compact Motor Architecture

The 1FK7 Compact design is intended for machine axes where installation length and dynamic response are important.

Typical advantages include:

• Compact axial dimensions
• Moderate rotor inertia
• Responsive acceleration
• Easier integration into small machines
• Suitability for cyclic positioning

Actual dynamic performance depends on the driven load, coupling, gearbox and drive tuning.

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
• 1FK7042-2AF71-1CG1 motor
• Coupling or gearbox
• Approved motor parameters

The motor cannot be connected directly to a standard AC mains supply.

Replacement Identification

Correct Model Number

1FK7042-2AF71-1CG1

Motor Family

1FK7 Compact

Static Torque

3 Nm

Rated Speed

3000 rpm

Encoder

24-Bit + 12-Bit Multiturn Absolute

Encoder Interface

DRIVE-CLiQ

Shaft

Plain Shaft

Holding Brake

Not Included

Before replacement, confirm:

• Complete order number
• AF71 winding code
• CG1 encoder and mechanical suffix
• Motor power and torque
• Encoder configuration
• Shaft design
• Brake requirement
• Connector orientation
• Mounting dimensions
• Motor cable
• Drive firmware compatibility

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

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 the power and encoder connections.

Confirm the complete order number.

Inspect the flange and shaft.

Check the coupling condition.

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 position and direction.

Verify vibration and operating current.

Validate machine safety functions before production use.

Installation should be completed by qualified servo-drive personnel.

FAQ

Q1: What is 1FK7042-2AF71-1CG1?

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

Q2: What is its rated power?

A2: The rated output is approximately 0.82 kW.

Q3: Which encoder does it use?

A3: It uses a 24-bit plus 12-bit multiturn absolute encoder with DRIVE-CLiQ communication.

Q4: Is this a single-turn encoder?

A4: No. The CG1 configuration uses a multiturn absolute encoder.

Q5: Does the motor include a holding brake?

A5: No. This specific 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 cooling method is used?

A7: The motor uses natural cooling.

Q8: What is the protection rating?

A8: The motor configuration is specified with IP65 protection.

Q9: Can it connect directly to an AC mains supply?

A9: No. It requires a compatible servo-drive and Motor Module.

Q10: What distinguishes it from other 1FK7042 motors?

A10: Its main distinguishing combination is the 3000 rpm winding, AM24DQI multiturn encoder, plain shaft and no-brake construction.