Yaskawa Motoman AR3120 Review: Specs, Price and Applications of the 20 kg Arc Welding Robot
Updated: 2 days ago

The Yaskawa Motoman AR3120 is a 6-axis arc welding robot with a maximum payload of 20 kg, a reach of 3124 mm and ±0.07 mm repeatability, listed from USD 32,000. This review covers its full specifications, design, programming options, applications and price, so you can decide whether it fits your automation project.
Quick Verdict
The Yaskawa Motoman AR3120 is a 6-axis arc welding robot with a maximum payload of 20 kg, a horizontal reach of 3124 mm and a repeatability of ±0.07 mm. It belongs to Yaskawa's AR series of arc welding robots. The arm weighs 560 kg and is installed on the floor, wall, ceiling or tilted, and it runs on the YRC1000 controller. It is listed from USD 32,000.
Yaskawa Motoman AR3120 at a Glance
Maximum payload: 20 kg
Reach: 3124 mm
Axes: 6
Repeatability: ±0.07 mm
Weight: 560 kg
Controller: YRC1000
Price: from USD 32,000
Yaskawa Motoman AR3120 Technical Specifications
The table below lists the published specifications of the Yaskawa Motoman AR3120.
Specification | Yaskawa Motoman AR3120 |
Manufacturer | Yaskawa Motoman |
Model | AR3120 |
Robot type | 6-axis arc welding robot |
Maximum payload | 20 kg |
Reach | 3124 mm |
Axes | 6 |
Repeatability | ±0.07 mm |
Controller | YRC1000 |
Interfaces | EtherNet/IP, PROFINET, PROFIBUS, DeviceNet, CC-Link, EtherCAT, Modbus TCP, AS-Interface, OPC UA, 2 Ethernet ports, 40 digital inputs / 40 digital outputs |
Starting price | From USD 32,000 |
Detailed Technical Data
6 controlled axes
Max. payload 20 kg
Horizontal reach 3124 mm
Repeatability ±0.07 mm
Mass 560 kg
Installation floor, wall, ceiling, tilted
Controller YRC1000
Design and Build Quality

The AR3120 belongs to the Motoman AR-series. Published build data: mass 560 kg; installation floor, wall, ceiling, tilted.
Programming and Software
INFORM and MotoSim
The AR3120 runs on the YRC1000 controller and is programmed from the teach pendant in Yaskawa's INFORM language. Yaskawa's MotoSim software is available for offline programming and simulation.
Industrial Communication
Published interfaces are EtherNet/IP, PROFINET, PROFIBUS, DeviceNet, CC-Link, EtherCAT, Modbus TCP, AS-Interface, OPC UA, 2 Ethernet ports and 40 digital inputs / 40 digital outputs.
Yaskawa Motoman AR3120 Applications and Use Cases
Typical applications for the AR3120 are arc welding, spot welding, cutting, material handling and machine tending.
Arc welding

The AR3120 carries an arc welding torch along the seam with ±0.07 mm repeatability.
Spot welding
The AR3120 carries a spot welding gun for sheet-metal joining in body and frame production.
Cutting
The AR3120 is used for cutting within its 20 kg payload and 3124 mm reach.
Yaskawa Motoman AR3120 Price and Value
The Yaskawa Motoman AR3120 is listed from USD 32,000 on All Things Cobots. The controller, end effectors, safety equipment and integration affect the final price and are quoted separately. Prices are indicative, are not final and may change.
Pros and Cons
Pros
20 kg maximum payload with a 3124 mm reach
±0.07 mm repeatability
Several installation options: floor, wall, ceiling, tilted
Wide choice of industrial fieldbus interfaces
Cons
Needs safety fencing or equivalent safeguarding
The 20 kg maximum payload includes the end effector
End effectors, safety equipment and integration are quoted separately
Who Should Buy the Yaskawa Motoman AR3120?
The Yaskawa Motoman AR3120 fits fabricators and manufacturers that are automating arc welding.
See the full Yaskawa Motoman AR3120 product listing on All Things Cobots.
Yaskawa Motoman AR3120 FAQ
How much does the Yaskawa Motoman AR3120 cost?
The Yaskawa Motoman AR3120 is listed from USD 32,000 on All Things Cobots. The price is indicative and may change, and it does not include end effectors, safety equipment or integration.
What is the payload and reach of the Yaskawa Motoman AR3120?
The AR3120 has a maximum payload of 20 kg and a reach of 3124 mm.
How accurate is the Yaskawa Motoman AR3120?
Its published repeatability is ±0.07 mm.
How many axes does the Yaskawa Motoman AR3120 have?
The AR3120 has 6 axes.
How is the Yaskawa Motoman AR3120 programmed?
It is programmed from the teach pendant in Yaskawa's INFORM language, and MotoSim is available for offline programming and simulation.
Which controller does the Yaskawa Motoman AR3120 use?
It runs on the YRC1000 controller.
How much does the Yaskawa Motoman AR3120 weigh?
Published mass 560 kg.
How can the Yaskawa Motoman AR3120 be mounted?
Published installation options: floor, wall, ceiling, tilted.
What is the Yaskawa Motoman AR3120 used for?
Typical applications are arc welding, spot welding, cutting, material handling and machine tending.
Specifications and prices are based on manufacturer and distributor information. Prices are indicative, are not final and may change.





