How to Choose the Industrial Robots Core Parameters ?

In the era of intelligent manufacturing, industrial robots have become the core workforce on production lines. Robots for 3C precision assembly, automotive body welding, food sorting/packaging, heavy machinery handling—accurate task completion across all industrial scenarios.

However, whether a robot can be competent depends on its core parameters. Choose the right robot: a "capable assistant" that doubles efficiency.Choose wrong parameters: cost waste + production downtime.

This article breaks down RBTC industrial robot—help you match needs & choose the right RBTC robot.

Industrial Robot Decoded: Choose the Right Core Parameters to Double Production Efficiency!

1.What Are the Motion Parameters of Industrial Robots?

Choose an industrial robot: start with motion parameters—they’re the foundation of its "motion capability".

Motion parameters are the primary consideration for selection. They determine if the robot completes specific movements, covers the workspace, and achieves high-efficiency production beats.

1.1 What Is the Degrees of Freedom (DOF) of an Industrial Robot?

Degrees of freedom (number of axes) is the "synonym" for the flexibility of an industrial robot.

Degrees of freedom (number of axes) refers to the number of joints that a robot can move on its own. Common types: 3-axis robots, 4-axis robots, 6-axis robots and 7-axis robots.

The more axes robot has, the more flexible its movements, enabling it to avoid obstacles and realize complex trajectories. The fewer axes it has, the simpler and more stable its structure, and the lower its cost.

For example, 3-axis/4-axis robots: Ideal for simple tasks (handling, loading/unloading) with linear/fixed trajectories.6-axis/7-axis robots: Multi-joint linkage enables complex processes (welding, assembly, grinding) requiring precise posture adjustment.

For instance, car body welding relies on the high flexibility of 6-axis robots.

1.2 How Does the Working Range of an Industrial Robot Affect Production?

The working range of an industrial robot is the "boundary line" of its operation coverage.

The working range: the spatial area reachable by the robot’s end effector—including horizontal radius and vertical stroke. It directly determines the operation coverage area of the robot and also affects the layout of the production line.

Small working range robots (≤500mm radius): Ideal for small-parts desktop assembly.

Large working range robots (≥2000mm radius): Fit for large equipment welding, cross-station handling.

Note: A larger working range leads to greater robot motion inertia and harder precision control.

1.3 What Is the Motion Speed of an Industrial Robot?

The motion speed of an industrial robot is the "accelerator" for production beats.

Robot motion speed includes two key metrics: joint rotational angular velocity and end effector linear velocity.

Faster speed shortens single-process time and tightens production line beats—directly enhancing efficiency.

Speed and precision involve a trade-off: faster robot speed increases inertia, often causing positioning deviations.

Moreover, high speed places higher requirements on the drive and braking systems.

High-speed robots: Ideal for efficiency-focused, low-precision tasks (sorting, handling).

Precision assembly/micro-welding: Prioritize accuracy—reduce speed appropriately.

2. What Is the Core Determinant of Industrial Robot Work Quality?

The core of robot work quality: Precision parameters.

Motion parameters define "what movements the robot can make."Precision parameters define "how accurately it makes them."In mass production, precision directly impacts product yield—critical for quality control.

2.1 Positioning Precision: "Accuracy" of Target Position

Positioning precision: Deviation between end effector’s actual & target position (unit: mm).

The higher the precision, the more accurate the robot's movements, which can ensure the consistency of processing or assembly.

For RBTC robots:

Precision electronics (chip packaging, micro-part assembly): ±0.01mm positioning precision.

General handling/packaging: ±0.1mm positioning precision suffices.

2.2 Repeatability Precision: "Stability" in Mass Production

Repeatability precision: Deviation when end effector reaches the same position via repeated motion trajectories.

It is one of the core precision indicators of industrial robots.

Repeatability precision = mass production consistency.

Smaller deviation → more uniform product quality → higher yield.

Auto parts welding (same-batch consistent weld points): Robot needs ±0.05mm repeatability precision.

Trash can handling (low-precision needs): ±1mm repeatability precision suffices—controls equipment costs.

3. The Relationship Between Load Parameters and Industrial Robots

Load parameters: The key determining the robot's "load-bearing capacity".

Rated load: Maximum weight the robot’s end effector can bear (fixtures + workpieces included).

This directly determines whether the robot can lift the workpiece and also affects its speed and precision.

The larger the load, the higher the requirements for the strength and torque of the robot's body structure, drive motor, and reducer. Usually, it is necessary to sacrifice part of the speed and precision to ensure stability.

According to different loads, the application scenarios of robots are also clearly divided:

Light-load robots (≤5kg) are suitable for 3C assembly and small part handling;

Medium-load robots (5-50kg) can be used for auto interior assembly and home appliance part processing;

Heavy-load robots (≥100kg) are the "main force" for car body welding and large workpiece handling.

4. What Other Parameters Affect the Operation of Industrial Robots?

4.1 Protection Level (IP Rating): "Resistance" to Harsh Environments

Protection level: Represented by IPXX (IP rating standard).

The first digit indicates dustproof capability, and the second digit indicates waterproof capability. The higher the level, the stronger the resistance to harsh environments and the lower the failure rate.

4.2 Control Method and Communication Interface: "Connection Point" for Production Line Collaboration

Advanced motion control algorithms: Boost robot stability + trajectory planning.Universal protocols (Profinet, EtherCAT): Enable fast linkage with PLCs, conveyor belts.

Real-time communication robots: Integrate into automated collaborative systems—seamless process connection (intelligent production lines).

Dedicated control robots: Fit simple, single-equipment linkage scenarios.

5. How to Choose the Right Industrial Robots ?

Core Parameter Selection Comparison Table for Industrial Robots

Application Scenario	Degrees of Freedom (Number of Axes)	Working Range(Arm Length)	Repeatability Precision	Rated Load	Key Requirements
3C Product Precision Assembly	6-7 Axes	Small (≤800mm)	±0.005-±0.02mm	≤5kg	High Precision, High Flexibility
Automotive Body Welding	6 Axes	Large (≥1500mm)	±0.03-±0.05mm	50-200kg	High Load, High Repeatability, Weld Spatter Resistance
Food Sorting and Packaging	4-6 Axes	Medium (800-1500mm)	±0.05-±0.1mm	5-10kg	Waterproof and Dustproof, Sanitary Design
General Part Handling	3-4 Axes	Adjustable According to Workstation	±0.05-±0.2mm	5-50kg	High Speed, Stability
Automotive Painting	6-7 Axes	Large (≥1800mm)	±0.1-±0.2mm	10-30kg	Corrosion Resistant, Smooth Trajectory
Heavy Workpiece Handling (e.g., Machine Tool Loading/Unloading)	4-6 Axes	Large (≥2000mm)	±0.1-±0.5mm	≥100kg	High Load, High Rigidity

In conclusion, there is no "optimal solution" for industrial robot parameter selection, only the "most suitable one".

Robot selection: Match core parameters to your production scenario (operation content, workpiece characteristics, environmental conditions) → maximize robot value.

If your factory has a demand for industrial robots, please contact RBTC immediately. Our professional team can provide you with more accurate selection suggestions and corresponding solutions and services.