At present, China's robot market has entered a period of high-speed growth. The wave of "machine replacement" is unstoppable, and the application of products is emerging one after another. But at the same time, there are many safety accidents in the use of robots, resulting in casualties, property losses, information leakage, etc. Seemingly “safe” robots have many problems in function safety, electrical key parts, information safety, software quality, operating system, etc.

n response to the above issues, four ministries and commissions, including the national development and Reform Commission, the General Administration of quality supervision, inspection and quarantine, the Ministry of industry and information technology, and the certification and Supervision Commission, officially issued the "China robot certification (CR)" logo in Shanghai in November 2016. The CR Certification indicates that the robot has been recognized by the national authority in terms of product safety and reliability, and it is also a sign of qualified product quality.

As a leading brand of industrial robot servo drive in China, Tsino-dynatron has served many robot manufacturing enterprises to successfully pass CR certification and accelerate the layout of domestic market.

The following Q&A shows the knowledge points of CR certification

Q1: what kind of certification is required for CR certification?

A1: for industrial robots, function safety certification, electromagnetic compatibility certification or safety + electromagnetic compatibility certification are neccessary.

In addition, the certification mode is divided into product type test (mode A) and product type test + initial factory inspection + Post certification supervision (mode B).

Q2: What is the most difficult part to pass CR certification? What is the reason for the failure?

A2: In CR certification, the two items of radiation and conduction in EMC have low passing rate. In the robot certification (for robots sold in China), EMC has made requirements for the launch and immunity of robots.

The reasons for failure can be attributed to system design problems: cable selection, cabinet structure design, filter selection and other factors may lead to EMC failure.

Q3: Is there any professional suggestions for the manufacturers undergoing EMC rectification?

A3: In a word, there are three ways to solve EMI problems: shielding, filtering and grounding.

Firstly, shielding. The cable in the robot body pipeline package must be shielded wire, and the shielding layer shall be connected with the heavy-duty connector shell, and aviation plug shell with 360 ° coverage. The cables in the interconnection line between the robot body and the electrical cabinet shall be shielded wire, and the shielding layer shall be 360 ° coverage with the heavy-duty shell.

Secondly, the appropriate filter should be selected. The input end and output of the power filter shall be completely isolated, and the metal shell of the filter shall be closely combined with the shielding box to realize good grounding. Before certification, it is better to conduct the pre test in the field, which can save the time of field rectification.

Finally, grounding. The body and the electrical cabinet shall be reliably grounded, and the metal parts inside the electrical cabinet shall be reliably connected.

Q4: What about the rectification methods of conducted emission?

A4: the design and rectification methods of conduction emission generally start from the following points:

1. Select the appropriate filter.

2. The length of the power input wire in the shielding shell shall be shortened.

3. Input end and output of power filter shall be completely isolated.

4. The filter metal shell and the shielding box are closely combined to achieve good grounding.

5. Select appropriate magnetic ring for temporary adjustment.

The industrial robot industry is gradually realizing the importance of CR certification, which is of great value to the stable development of domestic industrial robots in the future.

Does your industrial robot get CR certification?