AUBO-i20 vs FANUC CR-35iB: Robot Comparison

IN A NUTSHELL

AUBO-i20 vs FANUC CR-35iB is a choice about collaborative handling and cell integration. AUBO-i20 and FANUC CR-35iB 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.

AUBO-i20 vs FANUC CR-35iB: quick verdict

Shortlist AUBO-i20 for 20 kg collaborative-platform handling within the documented 1650 mm working reference. Shortlist FANUC CR-35iB for 35 kg collaborative-platform handling within the documented 1831 mm working reference. 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 AUBO-i20 against FANUC CR-35iB. 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

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.

AUBO-i20: design and configuration

The AUBO Robotics AUBO-i20 is a six-axis collaborative robot arm with a payload of 20 kg, a reach of 1650 mm and repeatability of ±0.1 mm. It is designed for heavy-payload, long-reach work such as palletizing, machine tending, material handling, packaging and welding. The arm weighs 63 kg. It runs on the AUBO CB-M control box and communicates over TCP/IP, Modbus RTU/TCP and PROFINET, with SDK and ROS support for integration. The AUBO-i hardware has six rotating joints and a model-specific load-deflection limit. The source review describes a CB-M control box; the current AUBO-i manual identifies CB-iS controllers, so match the arm and control generation explicitly. Power-and-force limits depend on the full application, tool contact geometry and safety settings, and do not prove unrestricted operation next to people. The current AUBO-i manual specifies ±0.05 mm repeatability for the i20, rather than the older review’s ±0.1 mm reference. Confirm the corresponding controller generation with the supplier.

FANUC CR-35iB: design and configuration

The FANUC CR-35iB is the named 6-axis configuration with 35 kg payload, 1831 mm horizontal reach and ±0.03 mm repeatability in the reviewed model scope. This is the green CR platform rather than the separate CRX range. The complete moving load, installation reactions, collision behaviour and safety settings need a task-specific validation. Do not transfer CRX software, arm weight or controller assumptions to this model. The control baseline is R-30iB Plus package; verify cabinet and supplied generation; cabinet, industrial-network licences, safety options and process software must be named in the quotation.

For this pair, FANUC CR-35iB offers 35 kg over the stated 1831 mm reference, compared with 20 kg and 1650 mm for AUBO-i20 example. FANUC CR-35iB has the larger stated distance by 181 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 16 kg: a 4 kg tool and adapter package carrying a 12 kg part or product group. This arithmetic leaves 4 kg below the AUBO-i20 example’s nominal limit and 19 kg below FANUC CR-35iB’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? AUBO-i20 is the lower-or-equal nominal payload choice in this pair. FANUC CR-35iB 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. AUBO-i20 provides a stated 1650 mm reference, while FANUC CR-35iB provides 1831 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 ±0.1 mm for AUBO-i20 and ±0.03 mm for FANUC CR-35iB. 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 AUBO-i20 over FANUC CR-35iB. Use a measured or validated application cycle before assigning a throughput benefit.

Programming, controls and production integration

AUBO-i20 is paired here with AUBO CB-M control box, while FANUC CR-35iB uses R-30iB Plus package; verify cabinet and supplied generation. Controller names identify the review baseline rather than a guarantee that all interface options are included. Compare the actual software revision, teaching workflow, diagnostic tools, fieldbus licences and recovery procedures. An existing trained team and reusable production code may outweigh a small dimensional advantage. Obtain a demonstration of the same machine handshake and interrupted-cycle recovery on both platforms.

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.

Configuration and communication detail

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.

Treat safe operation as a property of the complete task and installation. Include the tool, sharp workpiece edges, trapping points, dropped loads and machine access. A collaborative arm does not make an unrestricted-speed application safe. Validate the required speed, force and separation measures with the actual parts. Plan tool replacement and fault recovery without dismantling the whole installation, and include connector access, lubrication and spare-cable replacement in the maintenance layout.

Price and lifecycle value

Published arm list prices: AUBO-i20 is listed from $36,300 and FANUC CR-35iB is listed from $85,000. Request configuration-specific quotations for AUBO-i20 and FANUC CR-35iB. An arm-only number is not the price of a commissioned production cell. Ask for separate line items for controller, pendant, communication options, end effector, safety equipment, installation, acceptance, training and warranty. Price changes, regional support and included software can reverse an apparent hardware-cost advantage. Compare the same delivered scope before calculating payback.

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

Advance AUBO-i20 when 20 kg collaborative-platform handling within the documented 1650 mm working reference solves the real constraint and its selected configuration passes the load and access checks. Advance FANUC CR-35iB when 35 kg collaborative-platform handling within the documented 1831 mm working reference 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.

Motion architecture and functionality

AUBO-i20 has 6 arm axes and FANUC CR-35iB has 6 arm axes. Both have six arm axes; equal axis counts do not establish equal joint travel, inner workspace or fixture access. Compare tool detection, sensing, machine I/O and recovery as separate delivered functions.

Industries and application fit

For AUBO-i20 vs FANUC CR-35iB, use the actual part and process as the industry filter. Electronics, manufactured-component handling and machine tending are candidate uses when their tool mass, access and quality requirements fit the documented configurations. These are application-selection judgments, not claims that either exact model is installed at a named customer. A food, medical-device or clean-production application additionally requires the correct material, lubrication and protection package; the base model name does not establish hygienic or cleanroom compliance.

Frequently asked questions

Which robot is better for this application?

AUBO-i20 is the stronger starting point for 20 kg collaborative-platform handling within the documented 1650 mm working reference, while FANUC CR-35iB is worth shortlisting for 35 kg collaborative-platform handling within the documented 1831 mm working reference. 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 20 kg for the specified AUBO-i20 example and 35 kg for FANUC CR-35iB, 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 1650 mm for AUBO-i20 and 1831 mm for FANUC CR-35iB 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 ±0.1 mm for AUBO-i20 scope and ±0.03 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.

How should purchase prices be compared?

Use current written quotations for AUBO-i20 and FANUC CR-35iB with the same arm, controller, software, tooling and commissioning scope. This comparison does not represent an ATC sales offer or stock confirmation. Historical review figures are not a substitute for a configuration-specific purchase quotation.

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 AUBO-i20 and FANUC CR-35iB. 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

Read the AUBO-i20 review

Read the FANUC CR-35iB review

Specifications describe the model scope identified above. Purchase pricing requires a current configuration-specific quotation. Confirm current manufacturer documentation, local supply, controller compatibility and the exact configuration before purchase.