ABB IRB 120 vs Epson N2: Robot Comparison
Updated: 5 hours ago
IN A NUTSHELL
🔎 THE KEY DIFFERENCE ABB IRB 120 has the higher stated load capacity and longer stated reach. Those figures help shortlist it for heavier loads or wider layouts, but do not prove a faster production cycle. |
→ CONSIDER ABB IRB 120 Consider it when additional load capacity and reach matter. This article compares 3 kg with a published reach of 580 mm; include the gripper and part in the load. |
→ CONSIDER Epson N2 Consider it when its stated load and reach already cover your task and its controls fit your equipment. This article compares 2.5 kg with a published reach of 450 mm; include the gripper and part in the load. |
💡 THE TAKEAWAY Choose the robot that handles your actual tool and part through the required path, with controls and support your team can use. Compare complete installation quotes, rather than arm-only prices. |
ABB IRB 120 vs Epson N2 is a choice about assembly and machine tending. ABB IRB 120 and Epson N2 differ in their working envelope, loading assumptions and engineering ecosystem. A useful decision starts with the exact mechanism and process, then checks whether either robot can execute the required path with the real tool attached. This comparison separates documented specifications from application-level engineering judgments.
ABB IRB 120 vs Epson N2: quick verdict
Shortlist ABB IRB 120 for the specified ABB configuration and RAPID engineering workflow. Shortlist Epson N2 for folding-arm access in a verified confined workcell. Neither is a universal winner: a robot that can carry the load may still fail the fixture-access, controller or maintenance requirements.
The numerical comparison below uses ABB IRB 120 against Epson N2. The stated model scope matters when comparing later revisions or differently equipped installations. Published repeatability describes return to a taught position under specified conditions; it does not establish complete-cell accuracy or prove a faster production cycle.
Specifications and exact configuration scope
Criterion | ABB IRB 120 | Epson N2 |
|---|---|---|
Comparison configuration | ABB IRB 120 | Epson N2 |
Maximum wrist payload | 3 kg | 2.5 kg |
Reach / motion-area reference | 580 mm | 450 mm |
Axes | 6 | 6 |
Repeatability for this scope | ±0.01 mm | ±0.020 mm |
Controller reference | ABB IRC5 | Epson RC700-A |
Historical ATC review starting reference | From USD 16,000 | From USD 15,000 |
Purchase pricing | From $16,000 (arm list price) | From $15,000 (arm list price) |
Read the reach row together with the geometric notes below. Manufacturers may specify an arm-link sum, a wrist-centre motion area or reach to the flange; those dimensions are not interchangeable. The table does not establish access to every point at every tool angle. Controller references identify reviewed packages, and actual compatibility must be confirmed by model, software version and region.
ABB IRB 120: design and configuration
The IRB 120 is a 3 kg, 580 mm robot in normal use. The review also identifies a conditional 4 kg capacity with the wrist vertically downward. This comparison uses the normal 3 kg rating so that an orientation-specific exception is not presented as unrestricted capacity. Its IRC5 generation matters when assessing service and software compatibility.
Epson N2: design and configuration
The N2-A450 folding-arm robot has a 2.5 kg maximum and a 450 mm Point-P reach; Epson gives 507 mm at the wrist flange. Folding geometry can improve access in a confined cell, but its benefit depends on the complete approach and retreat path. The reviewed controller is RC700-A.
For this pair, Epson N2 offers 2.5 kg over the stated 450 mm reference, compared with 3 kg and 580 mm for the ABB example. ABB IRB 120 has the larger stated distance by 130 mm, but this difference is only a preliminary layout indicator because reference points and joint envelopes can differ. Locate the actual fixture in each manufacturer model before treating this as usable extra working space.
Payload, tooling and a worked load example
Consider an illustrative total wrist load of 2 kg: a 0.5 kg tool and adapter package carrying a 1.5 kg part or product group. This arithmetic leaves 1 kg below the ABB IRB 120 example’s nominal limit and 0.5 kg below Epson N2’s nominal limit. These are mass differences, not safety factors or a validated load approval. A heavy camera, valve block or retained material must be included before recalculating the total.
The example exposes the practical question: is the application limited by mass, by tool offset or by wrist rotation? Epson N2 is the lower-or-equal nominal payload choice in this pair. ABB IRB 120 offers more or equal headline mass capacity, but that alone cannot approve an eccentric fixture. Moving the same mass farther from the flange increases the moment, and spreading it increases rotational inertia. Manufacturer load diagrams and the actual centre of gravity govern the final allowable motion.
Model the empty, partly loaded and fully loaded tool states separately. A vacuum layer gripper, a weld torch with hoses or an inspection head may change its effective loading during the cycle. Set the controller’s load data for each supported state and validate the transition logic. A payload table cannot predict acceleration derating, cable pull or transient reactions at a machine interface.
Reach, orientation and fixture access
Build the same cell model for both candidates: base height, machine opening, fixture datum, maximum part size, tool extension and access for maintenance. ABB IRB 120 provides a stated 580 mm reference, while Epson N2 provides 450 mm. Check the deepest production pose and the return path with the loaded tool. An arm that just touches the target at full extension may have little freedom left to turn, retract or avoid a door.
For assembly and machine tending, test the gripper jaws in their open and closed positions. Include feeder replenishment, rejected-part disposal and tool changes. Check wrist flips and singularity avoidance along the whole path. A compact robot can fit a small fixture well, while a longer arm can simplify station placement; neither geometric benefit can be assumed without the actual model.
Precision and throughput: compare the same task
The comparison uses ±0.01 mm for ABB IRB 120 and ±0.020 mm for Epson N2. These figures should be read in their documented configuration scope. Repeatability is not absolute accuracy, camera calibration accuracy or finished-part capability. Fixture variation, TCP calibration, thermal conditions and tool compliance can dominate the error at the process point, especially when the tool extends far from the flange.
Ask each integrator to execute the same representative path with the same payload model, tool length, process dwell and stop conditions. Report transfer time, settling time, process time and waiting time separately. Published standard cycles often use different loads and distances; dividing one catalogue cycle by another would not establish the production advantage of ABB IRB 120 over Epson N2. Use a measured or validated application cycle before assigning a throughput benefit.
Programming, controls and production integration
ABB installations use the RAPID and RobotStudio engineering workflow, with the quoted controller and software determining the available functions. Epson uses RC+ and SPEL+; the reviewed controller or integrated-control package determines option compatibility. Existing staff skills, reusable code, spare parts and local service can therefore matter as much as the arm’s dimensional specifications.
Specify the PLC handshakes before ordering: cycle request, ready, busy, complete, fault, part present and recovery authorization. Define how an interrupted operation resumes without repeating a dangerous or quality-critical action. Vision, force sensing, fieldbus communication and external-axis coordination must be checked as explicit included or optional functions. An Ethernet connector does not by itself prove that a particular industrial protocol or software interface is licensed and supported.
Protection, installation and maintenance
Match the precise protection package to the process. Standard, protected, cleanroom, foundry and washing configurations can have different seals, services and maintenance requirements. Do not transfer the best optional IP or cleanroom rating to an unprotected base model. Check the controller location, cable bend radius, available lifting access and base reactions with the installer.
Plan for tooling changes and fault recovery as normal operating tasks. A gripper that can only be removed after dismantling guarding creates a maintenance cost that the robot purchase price will not show. Include access to connectors, lubrication points, mastering references and spare cables. Use a task-specific risk assessment and validated safeguarding for the whole installation; these industrial-arm specifications do not authorize unguarded collaborative operation.
Price and lifecycle value
The source reviews list From USD 16,000 for ABB IRB 120 and From USD 15,000 for Epson N2. These are historical editorial starting references, not current sales offers, confirmed stock or matched quotations. Revision, supply condition and included controller can change the relevant price. Request a written quotation naming the arm, controller, pendant, cables, software options, warranty and commissioning scope.
Compare the installed production scope: tool, fixtures, sensing, guarding, machine interface, programming, acceptance and training. For small-parts automation, include feeders, vision calibration, nests and rejected-part handling. Keep purchase cost and recurring support costs separate. No payback figure is defensible until the actual cycle, yield, utilization and installation quotation are known.
Selection and acceptance plan
Decision gate | ABB IRB 120 | Epson N2 |
|---|---|---|
Strongest documented fit | the specified ABB configuration and RAPID engineering workflow | folding-arm access in a verified confined workcell |
Main boundary | Tool mass, wrist moments and access constrain the headline specification. | Confirm exact configuration, controller, wrist loading and installation envelope. |
Required approval | Exact ABB variant, tool load and validated process path | Exact competitor revision, tool load and validated process path |
Acceptance evidence | Agreed parts, path, quality and recovery results | The same agreed parts, path, quality and recovery results |
Advance ABB IRB 120 when the specified ABB configuration and RAPID engineering workflow solves the real constraint and its selected configuration passes the load and access checks. Advance Epson N2 when folding-arm access in a verified confined workcell provides the more suitable process arrangement. Reject either candidate if a mandatory pose, protection requirement or controller function cannot be demonstrated. A purchasing shortlist should preserve these conditions instead of converting a single catalogue advantage into a blanket recommendation.
Before acceptance, agree the representative parts, tool states, operating sequence and quality criteria with both suppliers. Demonstrate cold start, normal production, rejected parts, interrupted cycles and controlled recovery. Record the final tool data and software backup. This turns the comparison into a repeatable purchasing decision and helps prevent a later fixture change from invalidating the original robot selection.
Frequently asked questions
Which robot is better for this application?
ABB IRB 120 is the stronger starting point for the specified ABB configuration and RAPID engineering workflow, while Epson N2 is worth shortlisting for folding-arm access in a verified confined workcell. The final choice depends on the real loaded path, required protection, controls and acceptance results. Neither a higher payload nor a longer reach establishes a universal winner.
What payload should I use for the comparison?
Use 3 kg for the specified ABB IRB 120 example and 2.5 kg for Epson N2, subject to all documented load and orientation conditions. Include the tool, adapters, sensors and carried part. Confirm exact configuration, controller, wrist loading and installation envelope.
Does the stated reach guarantee access to my fixture?
No. The comparison gives 580 mm for ABB IRB 120 and 450 mm for Epson N2 using the stated model references. Joint limits, reach reference points, wrist orientation, tool length and collisions determine whether the actual fixture is accessible. Simulate the full approach and exit path.
Can I use the best specifications from every family variant?
No. Keep each named model and revision intact. A different arm length, controller generation or protection option can change the relevant specification. Do not combine one version’s maximum payload with another version’s maximum reach.
Is repeatability the same as finished-part accuracy?
No. The stated values are ±0.01 mm for the ABB scope and ±0.020 mm for the competitor scope. Finished-part results also depend on fixtures, TCP calibration, sensing, thermal conditions and tool compliance. Validate the actual process instead of treating catalogue repeatability as a complete accuracy guarantee.
Are the review starting prices current purchase quotations?
No. From USD 16,000 and From USD 15,000 are historical references from the linked ATC reviews. They are not current matched offers and do not establish stock or the installed-cell cost. Obtain configuration-specific quotations with the controller, software, tooling, safety and commissioning scope itemized.
Can these robots operate safely next to people without guarding?
These specifications do not establish a safe unguarded installation. Assess the complete task, tool, load and machine interface, then implement and validate the required safeguarding and operating procedures. Do not infer collaborative operation from a compact arm, limited payload or education setting.
What should an acceptance test compare?
Use the same parts, actual tool load, fixture locations, path and quality criteria for ABB IRB 120 and Epson N2. Check production timing, settling, interruptions and recovery. Include the most difficult loaded approach and retreat. Approve the exact delivered configuration and preserve its final settings.
Related ATC reviews
Specifications describe the model scope identified above. Prices are indicative historical review references and may change. Confirm current manufacturer documentation, local supply, controller compatibility and the exact configuration before purchase.
