The 12 common types of robots include articulated, Cartesian, cylindrical, polar, SCARA, delta, collaborative (cobots), humanoid, autonomous mobile, medical, industrial, and service robots.
They are designed for different tasks and industries.
Each type varies in structure, movement, and application.
In this article:
What are the 12 types of robots?
Robots can be classified based on their mechanical structure, movement, application, control system, or operating environment. In manufacturing and robotics studies, a common classification identifies 12 major types of robots, each designed for specific tasks and industries.
These robots differ in degrees of freedom, motion capability, work envelope, flexibility, and applications.
The 12 commonly discussed types are:
- Cartesian robots
- Cylindrical robots
- Spherical (Polar) robots
- SCARA robots
- Articulated robots
- Delta robots
- Collaborative robots (Cobots)
- Autonomous mobile robots (AMRs)
- Automated guided vehicles (AGVs)
- Humanoid robots
- Industrial robots
- Medical robots
1. Cartesian Robots
Cartesian robots move along three linear axes:
- X-axis
- Y-axis
- Z-axis
Movement occurs in straight lines.
Structure
Three mutually perpendicular slides.
Characteristics
- High precision
- Simple control
- Rectangular work envelope
Applications
- CNC machines
- Pick-and-place systems
- 3D printing
- Packaging
Advantages
- High accuracy
- Easy programming
Limitations
- Limited flexibility
2. Cylindrical Robots
Cylindrical robots combine:
- Rotational motion
- Linear movement
Work area resembles a cylinder.
Applications
- Material handling
- Machine loading
- Assembly
Advantages
- Good reach
- Compact design
3. Spherical (Polar) Robots
These robots operate with:
- Rotational joints
- Linear arm extension
Work envelope resembles part of a sphere.
Applications
- Welding
- Material handling
- Die casting
Advantages
- Large workspace
4. SCARA Robots
SCARA means:
Selective Compliance Assembly Robot Arm
Designed for:
- High-speed assembly
Characteristics
- Rigid vertically
- Flexible horizontally
Applications
- Electronics assembly
- Packaging
- Pick-and-place operations
Advantages
- Fast operation
- High precision
5. Articulated Robots
These robots resemble a human arm.
They contain multiple rotary joints.
Typical range:
- 4–6 axes
- Sometimes more
Applications
- Welding
- Painting
- Assembly
- Material handling
Advantages
- Highly flexible
- Large movement range
Limitations
- More complex programming
6. Delta Robots
Delta robots have parallel arms connected to a common base.
Designed for:
- Very high-speed movement
Applications
- Food packaging
- Sorting
- Electronics
Advantages
- Extremely fast
- Lightweight moving parts
7. Collaborative Robots (Cobots)
Cobots work safely alongside humans.
Unlike traditional industrial robots:
- No large safety cages often required
Features:
- Sensors
- Force limitation
- Collision detection
Applications
- Assembly
- Inspection
- Small manufacturing operations
Advantages
- Safe interaction
- Flexible deployment
8. Autonomous Mobile Robots (AMRs)
AMRs navigate independently using:
- Sensors
- Cameras
- AI
- Mapping systems
They make decisions in real time.
Applications
- Warehouses
- Logistics
- Hospitals
Advantages
- Flexible movement
- Dynamic navigation
9. Automated Guided Vehicles (AGVs)
AGVs transport materials automatically.
Navigation methods:
- Magnetic strips
- QR codes
- Laser guidance
Applications
- Factories
- Warehouses
Advantages
- Efficient transport
Limitation
- Fixed routes
10. Humanoid Robots
Humanoid robots resemble humans.
They may include:
- Head
- Arms
- Legs
- Vision systems
Applications
- Research
- Customer service
- Education
Advantages
- Human-like interaction
11. Industrial Robots
Industrial robots are general-purpose programmable machines used in manufacturing.
Tasks:
- Welding
- Painting
- Assembly
- Material handling
Characteristics
- High repeatability
- Heavy-duty operation
12. Medical Robots
Medical robots assist healthcare professionals.
Applications:
- Surgery
- Rehabilitation
- Diagnostics
Examples include robotic surgical systems.
Advantages
- High precision
- Minimally invasive procedures
Comparison table
| Robot type | Main application |
|---|---|
| Cartesian | Linear motion tasks |
| Cylindrical | Material handling |
| Spherical | Welding and casting |
| SCARA | High-speed assembly |
| Articulated | Flexible industrial work |
| Delta | Fast pick-and-place |
| Cobot | Human collaboration |
| AMR | Autonomous transport |
| AGV | Guided transport |
| Humanoid | Human interaction |
| Industrial | Manufacturing |
| Medical | Healthcare |
Factors influencing robot selection
Engineers select robot types based on:
- Payload capacity
- Workspace
- Speed
- Precision
- Degrees of freedom
- Cost
- Application requirements
Conclusion
The 12 types of robots differ in structure, movement, and application. Some focus on industrial automation, others on mobility, healthcare, or human interaction. Understanding robot types helps engineers choose the most suitable system for manufacturing and operational needs.
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