Simple Kinematics for Specialized Tasks
Cylindrical Robots
Cylindrical robots, also known as column robots, are characterized by a kinematic system based mainly on motion rotary around the vertical axis and linear in the Z-axis.. They often also have an additional reach axis, which allows them to precisely dispense, pick up or place elements at a short distance from the column. This mechanical design makes the cylindrical robot ideal for tasks requiring regular rotations and "up-down" operation, especially when production stations are arranged radially around the axis of rotation.
Why Consider Cylindrical Robots?
Simple Construction and Low Maintenance Costs: Fewer complex joints and simpler drives translate into reduced potential failures and lower servicing costs.
Ease of Integration: Thanks to the limited number of movements (rotation + vertical + possibly reach), a cylindrical robot can be easier to program and faster to implement in repetitive, rotational applications.
Space Saving: The columnar design does not take up much space in the horizontal plane, which can be an advantage in tight halls or with densely packed workstations.
Cylindrical Robots
Construction and Operating Principle
Unlike Cartesian or articulated robots, cylindrical robots are characterized by a vertical column (Z-axis) and the ability to rotate around this axis (rotation axis). Many designs also add a reach (radius), which allows the tool (e.g., gripper) to move horizontally.
Mechanical Design
- Column (Z-axis) The base of the robot is a vertical column, along which an arm or carriage moves. This enables movement up and down, allowing parts to be picked up or placed at different levels.
- Rotation Axis Most often located at the base of the column, it provides the robot with the ability to rotate in the horizontal plane. Thanks to this, a single robot arm can serve several workstations arranged in a circle. Reach / Radius (optional)
- Reach / Radius (optional) Allows the tool (e.g., gripper, sensor) to be moved further from the axis of the column, which increases the robot's reach horizontally. In some designs, this may be an additional linear or rotary axis.
Drive and Control
- Stepper Motors or Servo Drives They control movement in the axis of rotation and the vertical axis (Z). Depending on the accuracy requirements, stepper motors (cheaper but with limited precision) or servo motors (higher precision and dynamics) are used.
- Controllers and HMI Panels Cylindrical robots can be operated by standard PLC controllers or dedicated manufacturer controllers. The software is usually less complex than in articulated robots, which simplifies implementation.
- Sensors and Safety Systems Depending on the application, limit switches, light curtains, or vision systems can be integrated. However, simple safety solutions are often sufficient if the robot operates in a designated area.
Type of Movement
- Complex Cylindrical Movement A cylindrical robot combines linear movement in the vertical axis with rotation around its own base. This combination allows it to serve multiple workstations arranged around the robot, making it an ideal solution for processes requiring flexibility and repeatability.
- Precise Manipulation Thanks to the ability to adjust the arm's reach, a cylindrical robot can operate at various radii from the main axis. This allows the movement to be adapted to the specifics of the process, from simple part transport to more precise tasks such as packaging or assembly.
- Limited number of axes: typically 2-3 degrees of freedom (rotation + vertical + radius), compared to up to 6 in articulated robots.
- Ease of maintenance: fewer connection points and mechanical joints translate into fewer elements requiring maintenance.
- Intuitive programming: Movements defined in one rotational axis and vertical axis (plus possibly reach) are relatively easy to program.
Key Advantages
Key Advantages of Cylindrical Robots
Cylindrical robots may seem less versatile than articulated or Cartesian robots, but they have a number of features that make them very attractive in selected applications:
- Compact and Stable Design The main column takes up little space horizontally. This allows the robot to be placed near other machines without taking up valuable floor space.
- Low Operating Costs Fewer joints and a simplified mechanical design translate into a reduction in the number of parts that can wear out. This usually means lower servicing and spare parts costs.
- Ease of Operation and Configuration The simplicity of kinematics means a shorter learning curve for operators and engineers. Often, advanced offline systems or 3D simulations are not needed to program basic movements of a cylindrical robot.
- Stability in Rotation-Vertical In tasks requiring regular rotation around its own axis and up-down movement (e.g., dispensing, picking parts from a drum), a cylindrical robot provides very repeatable results.
Applications in Industry
Cylindrical Robots
Although cylindrical robots seem less advanced kinematically than their articulated or Cartesian counterparts, in some processes they turn out to be indispensable. Below we present the most common areas of their use:
Rotation and Dispensing
Rotary liquid dispensing
When the dispensing unit needs to rotate around a central axis and move vertically (Z) - a cylindrical robot guarantees simplicity and repeatability of work.
Automatic substance application
Paints, adhesives, lubricants - dispensing along the vertical axis and rotation to evenly distribute the medium on the rotating element.
Rotary Machines and Drums
Picking up parts from a drum
In processes where elements are randomly placed in a rotary drum, the cylindrical robot can rotate around the column axis, move vertically, and effectively extract the parts.
Radial sorting
If workstations are arranged around, the columnar robot can easily "switch" between points, performing rotational and vertical movement.
Simple Assembly Applications
Arranging elements in a vertical axis
When precise up-down movement and rotation are sufficient to fit parts into prepared sockets.
Screwing or tightening nuts
Limited rotation and height change may be sufficient for uniform assembly processes, without the need for complex maneuvering in multiple planes.
Machine Operation
Vertical load
The cylindrical robot can pick up raw materials from one zone, lift them (Z), rotate, and then place them into a machining machine or onto the next workstation.
Loading and unloading
Thanks to the simplicity of movements, it works well with machines with a circular layout or a small working area, where operators want to automate only a specific task.
Quality Control and Testing
Camera or sensor positioning
Limited rotation and vertical movement may be sufficient for sequential inspection of several points on a given part.
Simple pressing or tightening tests
When consistent clamping force in the Z-axis and the ability to rotate the element by a selected angle are key.
Cylindrical robots
Industries Where Cylindrical Robots Are Most Often Used
Thanks to their simple kinematics and stable movements in the vertical and rotational axes, cylindrical robots find application in various industries. Below are some examples of industries where this type of robot is particularly valued:
Picking up small parts from a drum and placing them on an assembly line.
Dispensing solder paste or applying small components in the vertical axis.
Transferring products from rotating drums, e.g., in packaging or sorting processes.
Applying additives or spices in a uniform, vertical dispensing movement.
Dispensing liquids (e.g., perfumes, creams, detergents) in rotational and vertical movement.
Picking up and placing bottles or jars arranged around the robot's axis.
Picking vials from circular magazines, dispensing medications, closing and labeling packages.
Quality control using the pressing or force measurement method.
Rotational manipulation of samples, dispensing reagents in the vertical axis.
Test applications requiring cyclic pressing or checking strength within a limited range of motion.
In industries where repetitive rotational and vertical movement is important, and the process does not require complex trajectories or high lifting capacity, cylindrical robots perform perfectly, reducing automation costs and accelerating the implementation of new production lines.
Cylindrical robots
Technical Requirements and Integration
Cylindrical robots, although they have a relatively simple kinematics, still require proper adaptation to working conditions and correct integration with the production line. Below are the most important aspects to keep in mind before implementation:
Operating Parameters
Rotation Range
How large an angle of rotation is needed to handle components arranged around the station? Some models offer up to 360° rotation, while others allow for full, multiple rotations.
Load Capacity and Speed
Although typical cylindrical robots are used with smaller loads, it is worth checking the maximum load capacity in the vertical axis (Z). The permissible rotational speed is also important to avoid vibrations during faster cycles.
Accuracy and Repeatability
In some processes (e.g., dispensing, testing), high precision is required in setting the Z-axis and rotation angle. The repeatability parameter is usually given in millimeters or micrometers.
Integration with Control Systems
PLC and Communication Protocol
Cylindrical robots often work with popular protocols (e.g., EtherCAT, Profinet, Modbus). For simple applications, a standard PLC is sufficient to control the Z-axis and rotary axis.
Software and Programming
Typically, suppliers offer their own environment for creating paths, although in many cases, simple sequential programming in a PLC is sufficient. Thanks to the limited number of axes, programming can be very intuitive.
Safety and Sensors
If human presence is not expected in the robot's work area, standard enclosures or light curtains are sufficient. In more complex applications, such as tool changing, it is worth considering additional positioning sensors or a vision system.
Environmental Conditions
Temperature and Humidity
Cylindrical robots must be adapted to the conditions prevailing in a given production environment (e.g., cold storage facilities in the food industry, higher humidity in laboratories).
Dust and Dirt
If the process generates dust, chips, or metal particles, appropriate shields and seals should be used (e.g., an IP rating adapted to the conditions).
Compatibility with Industry 4.0
When working with IoT systems (collecting data on robot operation), check whether the cylindrical robot can be equipped with communication modules for remote monitoring and diagnostics.
Cylindrical Robots
Comparison with Other Types of Robots
Cylindrical robots are devices with a simple and efficient design, enabling movement in a cylindrical system - rotation, vertical movement, and optional reach. Thanks to the small number of axes (usually 2-3), they are extremely easy to operate, maintain, and program. They are an ideal solution in applications requiring repeatability, precision, and reliable performance. To fully understand their capabilities and choose the best technology for your processes, it is worth comparing them with other types of robots, such as Cartesian, SCARA, articulated, Delta, collaborative robots (cobots), or Gantry.
Cylindrical Robots vs. Cartesian (XYZ)
Kinematics and Range of Motion
Cylindrical robots combine rotary motion (around a vertical axis) with linear motion along that axis (Z), and often also with an additional radial axis (reach). Cartesian robots (XYZ) operate in three linear axes, which makes it easier to define simple motion paths (e.g., along X, Y, Z). Cylindrical robots can be more compact in the rotary axis, while Cartesian robots often take up more space in the plane, but provide a clear, "orthogonal" motion.
Applications
Cylindrical robots are chosen where details or workstations are arranged around an axis of rotation - for example, in machines that service a cylindrical chamber, or in "pick and rotate, then lift (Z)" applications. Cartesian (XYZ) robots perform well in processes requiring long, straight movements (e.g., 3D printing, milling, precise pick & place in a large plane).
When to Choose?
If you need a simple and reliable robot for rotary motions around an axis and at the same time vertical (Z), and the layout of workstations is arranged around it - a cylindrical robot may be sufficient and economical. However, if you have a large working area in the X, Y axes and repeatability in linear movements is key, a Cartesian (XYZ) robot will prove to be more versatile.
Cylindrical vs. SCARA Robots
Construction and Dynamics
SCARA robots have two rotary joints in the horizontal plane and a rigid vertical axis (Z), which gives them very high speed and precision for assembly or pick & place tasks. Cylindrical robots, although they can also rotate around their own axis, usually do not achieve such high horizontal dynamics, focusing on servicing workstations arranged around it and movement in the vertical direction.
Applications and Typical Advantages
SCARA robots are masters of fast transfer of elements and assembly of small parts, especially in a limited area. Cylindrical robots, on the other hand, are suitable for applications where less complex kinematics is sufficient (rotation + reach + vertical), for example in simple dispensing or machine loading lines, where details are placed around it. SCARA usually require a precisely designed trajectory in the plane, but offer higher speed and cycle repeatability.
When to Choose?
If your application requires extremely short cycle times and primarily operates in a single plane (e.g., assembling small components, pick & place), SCARA will be the better choice. However, if the parts are distributed around the robot and simple rotation by a certain angle and movement in the vertical axis (Z) are important, a cylindrical robot may be sufficient and cheaper to maintain.
Cylindrical vs. Articulated (Robotic Arm) Robots
Degrees of Freedom and Range of Motion
Articulated (robotic arm) robots have 4 to 6 rotational axes, which provides impressive flexibility - they can perform complex trajectories in multiple planes. Cylindrical robots mainly offer rotational movement around their own axis plus vertical (Z) movement, possibly with additional reach. This means that the range of motion of a cylindrical robot is significantly more limited compared to an articulated robot.
Applications
Articulated (robotic arm) robots are excellent for tasks such as welding, painting, assembly in various orientations, and CNC machine operation. Cylindrical robots, on the other hand, perform well where vertical axis movement and limited rotation are sufficient - e.g., picking parts from a rotating drum and transferring them to one or two stations around the circumference.
When to Choose?
If you need versatility and the ability to work in many spatial directions, an articulated robot is unmatched. However, if the application only requires movements in the vertical direction and rotation within a radius around the base, a cylindrical robot will perform the task in a simpler and cheaper way.
Cylindrical vs. Delta Robots
Kinematics and Range of Motion
Delta robots are an advanced kinematics based on three (or four) arms attached to a common platform placed above the work area. This allows them to achieve exceptionally high speeds when transferring small components. Cylindrical robots have rotational movement around the vertical axis and the ability to move in the Z-axis (possibly with reach), which means that their range of motion is more limited, and the dynamics are usually lower.
Applications and Characteristics
Delta robots excel in ultra-short pick & place cycles, primarily with lightweight objects, such as in the food or pharmaceutical industry. Cylindrical robots are better suited for simpler tasks: they can rotate around their own axis, pick up an item from one station and move it to another - especially when the stations are arranged in a circle. However, they will not achieve the same high speeds and dynamic precision as Delta robots.
When to Choose?
If the priority is extremely fast transfer of small parts (hundreds of cycles per minute), choose a Delta robot. However, if the process is less dynamic and only requires vertical rotation and a simple path (e.g., up-down) without complex kinematics, a cylindrical robot will be sufficient and often cheaper to operate.
Cylindrical Robots vs. Cobots (Collaborative Robots)
Safety and Interaction with the Operator
Cobots were created for direct collaboration with humans (collaborative robots). They have built-in advanced safety systems that detect collisions and allow them to work side by side with an operator. Cylindrical robots are classic industrial designs that typically require enclosures or light curtains if they operate at higher speeds or payloads.
Applications
In tasks requiring human-robot interaction (e.g., assembly assistance, where the robot provides parts to the operator), cobots have an advantage due to their built-in safety mechanisms and ability to be quickly reprogrammed. Cylindrical robots perform best with constant, repetitive rotational and vertical movements without the need for a human to be in close proximity to the work area.
When to Choose?
If safe operation with an operator and quick changeover of the workstation for different tasks are key, choose cobots. However, if the process only requires simple axial movements and rotation, and the workstation can be enclosed, a cylindrical robot will be a simpler and often cheaper solution.
Cylindrical Robots vs. Gantry (Bridge) Robots
Design and Working Area
Gantry systems are based on several linear axes, often on a large scale (e.g., moving a crane across an entire hall). They enable the transport of heavy or oversized elements to many points distributed over a large area. A cylindrical robot has a more compact design: a column with a rotary axis and a guide (Z) - ideal for applications where workstations are arranged in a circle on a small area.
Applications
Gantry systems are definitely "on a larger scale" - they are often found in high-bay warehouses, the steel industry, or in handling production lines with large loads. Cylindrical robots are usually smaller, designed for tasks such as picking up parts from a drum, rotating them by a specific angle, positioning them vertically, and transferring them to the next station.
When to Choose?
Gantry systems work well where long reach and handling of heavy elements over a larger area are needed. However, if you want to automate processes in a small area, designed around a rotary axis, a cylindrical robot may be sufficient and incomparably simpler to install.
Cylindrical robots offer simple kinematics that work well in rotational-vertical tasks on a limited area. This is an economical and reliable solution in many "pick and place" processes arranged in a circular layout. At the same time, if the priority is ultra-fast pick & place, collaboration with an operator, or handling large areas, other robots (Delta, Cobots, Gantry) may prove more effective. The choice always depends on the specifics of the process, the range of motion, and the required operating parameters.
Frequently Asked Questions
Frequently Asked Questions about Cylindrical Robots
Usually, cylindrical models are designed for light and medium loads, although there are versions with slightly higher lifting capacity. If high lifting capacity is key, it is better to consider Gantry systems or articulated robots with a reinforced structure.
It depends on the drives used (servo or stepper motors) and the gearbox. In most cases, accuracy at the level of hundredths of a degree can be achieved, which is perfectly sufficient for dispensing and assembly applications.
Often, a PLC controller and simple movement sequences (rotation, linear movement in the Z-axis, possibly extension) are sufficient. Some companies provide their own software with a graphical interface, but for simple operations, programming can be less complex than, for example, in articulated robots.
The columnar design allows for compact installation. The entire "housing" of the robot usually takes up little space around the axis, but you need to take into account the safety zone if the robot rotates at high speed.
Thanks to the simplified mechanical system, servicing can be quite easy. It requires periodic inspection of bearings in the rotation axis, guides in the Z-axis, lubrication of elements, and checking the tightness of seals.
Yes, as long as it provides sufficient rigidity in the Z-axis and has programmed pressure parameters (which can be controlled, for example, by a servo motor with a torque sensor). If you need more complex movements (e.g., in multiple planes), consider an articulated robot.
Many models allow the addition of an extra rotary gripper or rotating tool, e.g., a screwdriver. In this case, the robot gains an additional axis (R), although this is not standard in all designs.
It depends on the mass of the load, the moment of inertia, and the power of the drives. Compared to SCARA or Delta robots, cylindrical robots do not achieve such extreme speeds, but they are usually sufficient for standard pick & place, dispensing, and machine handling tasks.
Yes, especially if you use common communication protocols and PLC controllers. Often, all that is needed is to adapt the input/output (I/O) system to the signals of the line and write short movement sequences.
Classic cylindrical robots are typical industrial robots that often require safety enclosures. If you need human-robot collaboration in the same workspace, consider dedicated cobots that have built-in safety systems (force and torque sensors) and are designed for direct interaction.
Do you have more questions?
Contact us or visit the FAQ section to get detailed answers to all your questions about cylindrical robots.
- Experience in Various Industries We implement projects for companies in the electronics, food, pharmaceutical, chemical, and many other sectors. We perfectly understand the specifics of various applications and can offer an appropriate model of a cylindrical robot and matching modules (e.g., grippers, dispensing systems).
- Individual Approach and Consulting We start each project with a detailed analysis of needs: what is the layout of the workstations, the type of parts, and the requirements for precision or speed. This allows us to deliver tailor-made solutions instead of imposing universal sets.
- Comprehensive Service - From Project to Maintenance We offer support at every stage of implementation - from technological consulting, through integration with the existing production line, to service and operator training. As a result, investment in cylindrical robots quickly brings the expected benefits.
- Innovative Technologies and Industry 4.0 Support We cooperate with manufacturers of the best drives and controllers, and our solutions can be easily integrated with IoT platforms or Big Data systems. This opens the way for remote monitoring, diagnostics, and continuous process improvement.
- Flexible Financing We understand that purchasing a robot is a significant investment. That's why we offer various financing models (leasing, long-term rental, Robot-as-a-Service) to tailor implementation costs to your capabilities and development plans.
Learn more about implementations and the results of our cooperation with clients in the Case Studies section. Contact us today, and together we will develop the best automation concept!
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NexaRob is a company with international reach, operating in over 100 countries. Whether you run a local production plant or are part of a global corporation, we guarantee:
- Expert Knowledge and Consulting Our engineers work with clients from various industries, sharing experiences and best practices for implementing cylindrical robots worldwide.
- Regional Service Support We have a network of qualified service technicians and local partners, which allows us to respond quickly to customer needs, minimizing downtime.
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By cooperating with NexaRob, you gain not only advanced robotic technology but also proven know-how with global reach, which ensures that your implementation is comprehensive and effective - regardless of location.
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At NexaRob, we believe that in the field of robotics and automation, synergistic cooperation between companies and specialists allows us to create innovative solutions that revolutionize production processes. If you supply components, AI technologies, IoT, vision systems or integrations for industrial robots, we invite you to cooperate!
Why is it worth cooperating with NexaRob?
Development and Innovation in the Robotics Industry
Together with our partners, we develop new modules for cylindrical robots and other types of robots, which allows us to continuously improve our offer and adapt to the growing demands of the market.
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We organize technical training sessions, webinars, and also provide promotional materials and contacts to a database of customers looking for automation solutions. Together we reach new audiences.
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With a presence in over 100 countries, NexaRob opens the way to markets with diverse characteristics. Our partners gain the opportunity to introduce their own products and services under a common banner of quality and innovation.
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Join the global NexaRob network!
Contact us so that we can discuss the details of cooperation and jointly develop the future of automation - including solutions based on cylindrical robots.
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