Comparative analysis of Cartesian robot and joint robot

First, rectangular coordinate robot

1. Concept:

Based on the spatial XYZ Cartesian coordinate system programming, with three axes and above degrees of freedom, it can realize automatic control, repeatable programming and repeated application, suitable for different tasks of automation equipment.

It is capable of carrying objects and operating tools to perform a variety of tasks. With regard to the definition of robots, with the continuous development of technology, continuous improvement, the Cartesian robot as a kind of robot, its meaning is constantly improving.

2. Features:

1) Arbitrarily combined into various styles to form two-axis to six-axis different structural forms.
2) Extra large stroke: The maximum length of a single root is 6 meters, but it can be easily connected to a large stroke, such as 50 meters long.
3) Strong load capacity: usually up to 200 kg, but its load capacity can be increased to several tons when multiple multi-slider structures are used.
4) High dynamic characteristics: at light load, its maximum operating speed is 8 meters per second and the acceleration is 5 meters per second.
5) High precision: Repeat positioning accuracy can reach 0.05mm~0.01mm.
6) Strong scalability: It is easy to change the structure or to adapt to new applications through programming.
7) Simple economy: Simple programming is similar to CNC milling machine, easy to train employees and maintenance, making it very economical.
8) Long life: The life of a Cartesian robot is generally more than 10 years, and it can be maintained for 40 years.
9) Wide range of applications: It can be easily assembled with various types and sizes of grips. It can be used for many common tasks such as welding, cutting, handling, loading and unloading, packaging, palletizing, testing, flaw detection, sorting, assembly, and sticking. Tasks such as marking, coding, coding and painting.

Figure 1 is a typical 3D Cartesian robot consisting of an X-axis, a Y-axis, a Z-axis, and a drive motor. In addition, a complete robotic system requires a control system and a hand grip.

Second, joint robot

1. Concept:

Also known as the articulated arm robot or the articulated arm, it has a high degree of flexibility, usually 5 to 6 axes, and is suitable for almost any trajectory or angle.

2. Features:

1) Have a high degree of freedom, flexibility, and work from different angles and orientations.
2) Speed ​​up to 6 m / s, acceleration 10 m / sec; high efficiency,
3) I often see it on the Internet or on TV, which is more familiar and acceptable to the world.
4) 6-axis robots are mainly used in automotive spot welding, arc welding, assembly (screwing), and inspection of these lightweight tasks.
5) People have developed 4-axis palletizing robots.

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