What program control safety needs to be considered for robotic arm case packing?

The program control safety of robotic arm packing is the core link to ensure the stable operation of automated production lines and prevent accidents. The following are key control points:
1、 Program Logic Security Design
Signal interlocking mechanism
Realize signal linkage of equipment such as robotic arms, conveyor belts, and packing machines through PLC systems. For example, the robotic arm is only allowed to pick up parts after the injection molding machine is opened, and the robotic arm can only place boxes after the conveyor belt is in place. Any malfunction in any link will immediately trigger a shutdown to avoid collision or damage to the workpiece.
Adopting a dual safety design, if it is required to press two operation buttons simultaneously to unload the workpiece, it can prevent misoperation.
Action timing and speed control
The program needs to preset the motion trajectory, speed, and acceleration/deceleration curve of the robotic arm to avoid product tipping or mechanical impact caused by emergency stop or rapid lifting. For example, adjust the air pressure to 4-5kg/cm ², based on the principle that there is no vibration during arm movement.
Real time monitoring of joint axis speed, automatic deceleration or shutdown if exceeded, and prompt operator intervention.
2、 Security Protection and Emergency Response
Emergency stop system
Set up a hardware emergency stop button (response time<100ms) and software emergency stop command dual circuit, directly cut off the power or send a brake signal to motor 34. The emergency stop button should be placed in a location that is easily accessible to the operator.
The system should record emergency stop events for post analysis purposes.
Regional isolation and sensor protection
Install safety light curtains and protective barriers in the working area of the robotic arm to prevent personnel from entering the dangerous area by mistake.
Integrating data from multiple sensors (such as ultrasound and LiDAR) to achieve multi-level response:
Emergency stop triggered within the danger threshold (e.g. obstacle distance from robotic arm<0.5m);
Automatically decelerate and re plan path 4 within the warning threshold.
3、 Operation and maintenance standards
Permission Management and Training
Operators must undergo professional training and hold certification before taking up their posts. Unauthorized modification of program parameters is strictly prohibited.
Check the condition of mechanical arm joints, end effectors, cables, and other components before daily homework, and regularly lubricate and tighten them.
Fault handling and redundancy design
The program should include an abnormal self diagnostic function, such as automatic shutdown and alarm when detecting abnormal air pressure or position deviation.
The key control circuits adopt redundant design (such as backup sensors and dual power supplies) to ensure that single point failures do not affect overall safety.